{"id":3004,"date":"2022-07-08T11:25:57","date_gmt":"2022-07-08T11:25:57","guid":{"rendered":"http:\/\/the-codest.localhost\/blog\/9-mistakes-to-avoid-while-programming-in-java\/"},"modified":"2026-03-09T13:13:14","modified_gmt":"2026-03-09T13:13:14","slug":"9-%ce%bb%ce%ac%ce%b8%ce%b7-%cf%80%ce%bf%cf%85-%cf%80%cf%81%ce%ad%cf%80%ce%b5%ce%b9-%ce%bd%ce%b1-%ce%b1%cf%80%ce%bf%cf%86%ce%b5%cf%8d%ce%b3%ce%b5%cf%84%ce%b5-%ce%ba%ce%b1%cf%84%ce%ac-%cf%84%ce%bf%ce%bd","status":"publish","type":"post","link":"https:\/\/thecodest.co\/el\/blog\/9-mistakes-to-avoid-while-programming-in-java\/","title":{"rendered":"9 \u03bb\u03ac\u03b8\u03b7 \u03c0\u03bf\u03c5 \u03c0\u03c1\u03ad\u03c0\u03b5\u03b9 \u03bd\u03b1 \u03b1\u03c0\u03bf\u03c6\u03cd\u03b3\u03b5\u03c4\u03b5 \u03ba\u03b1\u03c4\u03ac \u03c4\u03bf\u03bd \u03c0\u03c1\u03bf\u03b3\u03c1\u03b1\u03bc\u03bc\u03b1\u03c4\u03b9\u03c3\u03bc\u03cc \u03c3\u03b5 Java"},"content":{"rendered":"<p><strong><a href=\"https:\/\/thecodest.co\/el\/blog\/top-programming-languages-to-build-e-commerce\/\">Java<\/a><\/strong> \u03b5\u03af\u03bd\u03b1\u03b9 \u03bc\u03b9\u03b1 \u03b4\u03b7\u03bc\u03bf\u03c6\u03b9\u03bb\u03ae\u03c2 \u03b3\u03bb\u03ce\u03c3\u03c3\u03b1 \u03bc\u03b5 \u03b5\u03b4\u03c1\u03b1\u03b9\u03c9\u03bc\u03ad\u03bd\u03b7 \u03b8\u03ad\u03c3\u03b7 \u03c3\u03c4\u03bf\u03bd \u03ba\u03cc\u03c3\u03bc\u03bf \u03c4\u03c9\u03bd <strong><a href=\"https:\/\/thecodest.co\/el\/blog\/8-key-questions-to-ask-your-software-development-outsourcing-partner\/\">\u03b1\u03bd\u03ac\u03c0\u03c4\u03c5\u03be\u03b7 \u03bb\u03bf\u03b3\u03b9\u03c3\u03bc\u03b9\u03ba\u03bf\u03cd<\/a><\/strong>. \u0395\u03af\u03bd\u03b1\u03b9 \u03bc\u03b9\u03b1 \u03b9\u03c3\u03c7\u03c5\u03c1\u03ae \u03ba\u03b1\u03b9 \u03b5\u03c5\u03ad\u03bb\u03b9\u03ba\u03c4\u03b7 \u03b3\u03bb\u03ce\u03c3\u03c3\u03b1 \u03c0\u03c1\u03bf\u03b3\u03c1\u03b1\u03bc\u03bc\u03b1\u03c4\u03b9\u03c3\u03bc\u03bf\u03cd. \u03a0\u03b5\u03c1\u03af\u03c0\u03bf\u03c5 3 \u03b4\u03b9\u03c3\u03b5\u03ba\u03b1\u03c4\u03bf\u03bc\u03bc\u03cd\u03c1\u03b9\u03b1 \u03c3\u03c5\u03c3\u03ba\u03b5\u03c5\u03ad\u03c2 \u03c0\u03b1\u03b3\u03ba\u03bf\u03c3\u03bc\u03af\u03c9\u03c2 \u03bb\u03b5\u03b9\u03c4\u03bf\u03c5\u03c1\u03b3\u03bf\u03cd\u03bd \u03bc\u03b5 <strong>Java<\/strong> \u03ba\u03b1\u03b9, \u03c9\u03c2 \u03b5\u03ba \u03c4\u03bf\u03cd\u03c4\u03bf\u03c5, \u03c4\u03bf\u03c5\u03bb\u03ac\u03c7\u03b9\u03c3\u03c4\u03bf\u03bd 3 \u03b4\u03b9\u03c3\u03b5\u03ba\u03b1\u03c4\u03bf\u03bc\u03bc\u03cd\u03c1\u03b9\u03b1 \u03bb\u03ac\u03b8\u03b7 \u03ad\u03b3\u03b9\u03bd\u03b1\u03bd \u03ba\u03b1\u03c4\u03ac \u03c4\u03b7 \u03c7\u03c1\u03ae\u03c3\u03b7 \u03c4\u03bf\u03c5. \u03a3\u03b5 \u03b1\u03c5\u03c4\u03cc \u03c4\u03bf \u03ac\u03c1\u03b8\u03c1\u03bf, \u03b1\u03c2 \u03b5\u03c0\u03b9\u03ba\u03b5\u03bd\u03c4\u03c1\u03c9\u03b8\u03bf\u03cd\u03bc\u03b5 \u03c3\u03c4\u03bf \u03c0\u03ce\u03c2 \u03bd\u03b1 \u03bc\u03b7\u03bd \u03ba\u03ac\u03bd\u03bf\u03c5\u03bc\u03b5 \u03ac\u03bb\u03bb\u03b1.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">1. \u0395\u03be\u03b1\u03af\u03c1\u03b5\u03c3\u03b7 \u03c4\u03b1\u03c5\u03c4\u03cc\u03c7\u03c1\u03bf\u03bd\u03b7\u03c2 \u03c4\u03c1\u03bf\u03c0\u03bf\u03c0\u03bf\u03af\u03b7\u03c3\u03b7\u03c2<\/h2>\n\n\n\n<p>\u0391\u03c5\u03c4\u03cc \u03b5\u03af\u03bd\u03b1\u03b9 \u03bc\u03b1\u03ba\u03c1\u03ac\u03bd \u03c4\u03bf \u03c0\u03b9\u03bf \u03c3\u03c5\u03bd\u03b7\u03b8\u03b9\u03c3\u03bc\u03ad\u03bd\u03bf \u03bb\u03ac\u03b8\u03bf\u03c2 \u03c0\u03bf\u03c5 \u03c3\u03c5\u03bd\u03ac\u03bd\u03c4\u03b7\u03c3\u03b1. \u03a3\u03c4\u03b9\u03c2 \u03b1\u03c1\u03c7\u03ad\u03c2 \u03c4\u03b7\u03c2 \u03ba\u03b1\u03c1\u03b9\u03ad\u03c1\u03b1\u03c2 \u03bc\u03bf\u03c5, \u03c4\u03bf \u03ad\u03ba\u03b1\u03bd\u03b1 \u03ba\u03b9 \u03b5\u03b3\u03ce \u03c0\u03bf\u03bb\u03bb\u03ad\u03c2 \u03c6\u03bf\u03c1\u03ad\u03c2. \u0391\u03c5\u03c4\u03cc \u03c4\u03bf \u03bb\u03ac\u03b8\u03bf\u03c2 \u03c3\u03c5\u03bc\u03b2\u03b1\u03af\u03bd\u03b5\u03b9 \u03cc\u03c4\u03b1\u03bd \u03c0\u03c1\u03bf\u03c3\u03c0\u03b1\u03b8\u03b5\u03af\u03c4\u03b5 \u03bd\u03b1 \u03c4\u03c1\u03bf\u03c0\u03bf\u03c0\u03bf\u03b9\u03ae\u03c3\u03b5\u03c4\u03b5 \u03c4\u03b7 \u03c3\u03c5\u03bb\u03bb\u03bf\u03b3\u03ae \u03b5\u03bd\u03ce \u03c4\u03b7\u03bd \u03b5\u03c0\u03b1\u03bd\u03b1\u03bb\u03b1\u03bc\u03b2\u03ac\u03bd\u03b5\u03c4\u03b5. \u03a4\u03bf <code>ConcurrentModificationException<\/code> \u03bc\u03c0\u03bf\u03c1\u03b5\u03af \u03b5\u03c0\u03af\u03c3\u03b7\u03c2 \u03bd\u03b1 \u03c0\u03c1\u03bf\u03ba\u03cd\u03c8\u03b5\u03b9 \u03cc\u03c4\u03b1\u03bd \u03b5\u03c1\u03b3\u03ac\u03b6\u03b5\u03c3\u03c4\u03b5 \u03bc\u03b5 \u03c0\u03bf\u03bb\u03bb\u03b1\u03c0\u03bb\u03ac \u03bd\u03ae\u03bc\u03b1\u03c4\u03b1, \u03b1\u03bb\u03bb\u03ac \u03c0\u03c1\u03bf\u03c2 \u03c4\u03bf \u03c0\u03b1\u03c1\u03cc\u03bd, \u03b1\u03c2 \u03b5\u03c0\u03b9\u03ba\u03b5\u03bd\u03c4\u03c1\u03c9\u03b8\u03bf\u03cd\u03bc\u03b5 \u03c3\u03b5 \u03ad\u03bd\u03b1 \u03b2\u03b1\u03c3\u03b9\u03ba\u03cc \u03c3\u03b5\u03bd\u03ac\u03c1\u03b9\u03bf.<\/p>\n\n\n\n<p>\u0391\u03c2 \u03c5\u03c0\u03bf\u03b8\u03ad\u03c3\u03bf\u03c5\u03bc\u03b5 \u03cc\u03c4\u03b9 \u03ad\u03c7\u03b5\u03c4\u03b5 \u03ad\u03bd\u03b1 <code>\u03a3\u03c5\u03bb\u03bb\u03bf\u03b3\u03ae<\/code> \u03c7\u03c1\u03b7\u03c3\u03c4\u03ce\u03bd, \u03cc\u03c0\u03bf\u03c5 \u03ba\u03ac\u03c0\u03bf\u03b9\u03bf\u03b9 \u03b1\u03c0\u03cc \u03b1\u03c5\u03c4\u03bf\u03cd\u03c2 \u03b5\u03af\u03bd\u03b1\u03b9 \u03b5\u03bd\u03ae\u03bb\u03b9\u03ba\u03b5\u03c2 \u03ba\u03b1\u03b9 \u03ba\u03ac\u03c0\u03bf\u03b9\u03bf\u03b9 \u03cc\u03c7\u03b9. \u03a4\u03bf \u03ba\u03b1\u03b8\u03ae\u03ba\u03bf\u03bd \u03c3\u03b1\u03c2 \u03b5\u03af\u03bd\u03b1\u03b9 \u03bd\u03b1 \u03c6\u03b9\u03bb\u03c4\u03c1\u03ac\u03c1\u03b5\u03c4\u03b5 \u03c4\u03b1 \u03c0\u03b1\u03b9\u03b4\u03b9\u03ac.<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code lang=\"java\" class=\"language-java\">for (User : users) {\n\n   if (!user.isAdult()) {\n\n       users.remove(user),\n\n   }\n\n}\n<\/code><\/pre>\n\n\n\n<p>\u0395\u03ba\u03c4\u03b5\u03bb\u03ce\u03bd\u03c4\u03b1\u03c2 \u03c4\u03bf \u03c0\u03c1\u03bf\u03b1\u03bd\u03b1\u03c6\u03b5\u03c1\u03b8\u03ad\u03bd <a href=\"https:\/\/thecodest.co\/el\/dictionary\/what-is-code-refactoring\/\">\u03ba\u03c9\u03b4\u03b9\u03ba\u03cc\u03c2<\/a> \u03ba\u03b1\u03c4\u03b1\u03bb\u03ae\u03b3\u03b5\u03b9 \u03c3\u03c4\u03bf \u03bd\u03b1 \u03c0\u03ac\u03c1\u03b5\u03b9 <code>ConcurrentModificationException<\/code>. \u03a0\u03bf\u03cd \u03ba\u03ac\u03bd\u03b1\u03bc\u03b5 \u03bb\u03ac\u03b8\u03bf\u03c2; \u03a0\u03c1\u03b9\u03bd \u03bf\u03bb\u03bf\u03ba\u03bb\u03b7\u03c1\u03ce\u03c3\u03bf\u03c5\u03bc\u03b5 \u03c4\u03b7\u03bd \u03b5\u03c0\u03b1\u03bd\u03ac\u03bb\u03b7\u03c8\u03ae \u03bc\u03b1\u03c2, \u03c0\u03c1\u03bf\u03c3\u03c0\u03b1\u03b8\u03ae\u03c3\u03b1\u03bc\u03b5 \u03bd\u03b1 \u03b1\u03c6\u03b1\u03b9\u03c1\u03ad\u03c3\u03bf\u03c5\u03bc\u03b5 \u03bf\u03c1\u03b9\u03c3\u03bc\u03ad\u03bd\u03b1 \u03c3\u03c4\u03bf\u03b9\u03c7\u03b5\u03af\u03b1. \u0391\u03c5\u03c4\u03cc \u03b5\u03af\u03bd\u03b1\u03b9 \u03c0\u03bf\u03c5 \u03c0\u03c1\u03bf\u03ba\u03b1\u03bb\u03b5\u03af \u03c4\u03b7\u03bd \u03b5\u03be\u03b1\u03af\u03c1\u03b5\u03c3\u03b7.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u03a0\u03ce\u03c2 \u03bc\u03c0\u03bf\u03c1\u03ce \u03bd\u03b1 \u03c4\u03bf \u03b1\u03c0\u03bf\u03c6\u03cd\u03b3\u03c9;<\/h3>\n\n\n\n<p>\u03a5\u03c0\u03ac\u03c1\u03c7\u03bf\u03c5\u03bd \u03b4\u03cd\u03bf \u03c0\u03c1\u03bf\u03c3\u03b5\u03b3\u03b3\u03af\u03c3\u03b5\u03b9\u03c2 \u03c0\u03bf\u03c5 \u03bc\u03c0\u03bf\u03c1\u03bf\u03cd\u03bd \u03bd\u03b1 \u03b2\u03bf\u03b7\u03b8\u03ae\u03c3\u03bf\u03c5\u03bd \u03c3\u03b5 \u03b1\u03c5\u03c4\u03ae \u03c4\u03b7\u03bd \u03c0\u03b5\u03c1\u03af\u03c0\u03c4\u03c9\u03c3\u03b7. \u03a0\u03c1\u03ce\u03c4\u03b1 \u03b1\u03c0' \u03cc\u03bb\u03b1, \u03b5\u03c0\u03c9\u03c6\u03b5\u03bb\u03b7\u03b8\u03b5\u03af\u03c4\u03b5 \u03b1\u03c0\u03cc <strong>Java<\/strong> \u0397 \u03ba\u03b1\u03bb\u03bf\u03c3\u03cd\u03bd\u03b7 \u03c4\u03bf\u03c5 8 - <code>\u03a1\u03b5\u03cd\u03bc\u03b1<\/code>.<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code lang=\"java\" class=\"language-java\">List adults = users.stream()\n\n       .filter(User::isAdult)\n\n       .toList(),\n<\/code><\/pre>\n\n\n\n<p>\u03a7\u03c1\u03b7\u03c3\u03b9\u03bc\u03bf\u03c0\u03bf\u03b9\u03ce\u03bd\u03c4\u03b1\u03c2 \u03ad\u03bd\u03b1 <code>Predicate<\/code> \u03c6\u03af\u03bb\u03c4\u03c1\u03bf\u03c5, \u03ba\u03ac\u03bd\u03b1\u03bc\u03b5 \u03c4\u03bf \u03b1\u03bd\u03c4\u03af\u03c3\u03c4\u03c1\u03bf\u03c6\u03bf \u03c4\u03b7\u03c2 \u03c0\u03c1\u03bf\u03b7\u03b3\u03bf\u03cd\u03bc\u03b5\u03bd\u03b7\u03c2 \u03c3\u03c5\u03bd\u03b8\u03ae\u03ba\u03b7\u03c2 - \u03c4\u03ce\u03c1\u03b1 \u03ba\u03b1\u03b8\u03bf\u03c1\u03af\u03b6\u03bf\u03c5\u03bc\u03b5 \u03c4\u03b1 \u03c3\u03c4\u03bf\u03b9\u03c7\u03b5\u03af\u03b1 \u03c0\u03bf\u03c5 \u03c0\u03c1\u03ad\u03c0\u03b5\u03b9 \u03bd\u03b1 \u03c3\u03c5\u03bc\u03c0\u03b5\u03c1\u03b9\u03bb\u03b7\u03c6\u03b8\u03bf\u03cd\u03bd. \u03a4\u03bf \u03c0\u03bb\u03b5\u03bf\u03bd\u03ad\u03ba\u03c4\u03b7\u03bc\u03b1 \u03bc\u03b9\u03b1\u03c2 \u03c4\u03ad\u03c4\u03bf\u03b9\u03b1\u03c2 \u03c0\u03c1\u03bf\u03c3\u03ad\u03b3\u03b3\u03b9\u03c3\u03b7\u03c2 \u03b5\u03af\u03bd\u03b1\u03b9 \u03cc\u03c4\u03b9 \u03b5\u03af\u03bd\u03b1\u03b9 \u03b5\u03cd\u03ba\u03bf\u03bb\u03bf \u03bd\u03b1 \u03b1\u03bb\u03c5\u03c3\u03b9\u03b4\u03c9\u03b8\u03bf\u03cd\u03bd \u03ac\u03bb\u03bb\u03b5\u03c2 \u03c3\u03c5\u03bd\u03b1\u03c1\u03c4\u03ae\u03c3\u03b5\u03b9\u03c2 \u03bc\u03b5\u03c4\u03ac \u03c4\u03b7\u03bd \u03b1\u03c6\u03b1\u03af\u03c1\u03b5\u03c3\u03b7, \u03c0.\u03c7. <code>\u03c7\u03ac\u03c1\u03c4\u03b7\u03c2<\/code>. \u0391\u03bb\u03bb\u03ac \u03b3\u03b9\u03b1 \u03cc\u03bd\u03bf\u03bc\u03b1 \u03c4\u03bf\u03c5 \u0398\u03b5\u03bf\u03cd, \u03bc\u03b7\u03bd \u03c0\u03c1\u03bf\u03c3\u03c0\u03b1\u03b8\u03ae\u03c3\u03b5\u03c4\u03b5 \u03bd\u03b1 \u03ba\u03ac\u03bd\u03b5\u03c4\u03b5 \u03ba\u03ac\u03c4\u03b9 \u03c3\u03b1\u03bd \u03c4\u03bf \u03c0\u03b1\u03c1\u03b1\u03ba\u03ac\u03c4\u03c9:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code lang=\"java\" class=\"language-java\">users.stream()\n\n       .filter(v -&gt; !v.isAdult())\n\n       .forEach(users::remove),\n<\/code><\/pre>\n\n\n\n<p>\u0398\u03b1 \u03bc\u03c0\u03bf\u03c1\u03bf\u03cd\u03c3\u03b5 \u03b5\u03c0\u03af\u03c3\u03b7\u03c2 \u03bd\u03b1 \u03ba\u03b1\u03c4\u03b1\u03bb\u03ae\u03be\u03b5\u03b9 \u03c3\u03c4\u03bf <code>ConcurrentModificationException<\/code> \u03b5\u03c0\u03b5\u03b9\u03b4\u03ae \u03c4\u03c1\u03bf\u03c0\u03bf\u03c0\u03bf\u03b9\u03b5\u03af\u03c4\u03b5 \u03c4\u03b7\u03bd \u03c0\u03b7\u03b3\u03ae \u03c1\u03bf\u03ae\u03c2. \u039c\u03c0\u03bf\u03c1\u03b5\u03af \u03b5\u03c0\u03af\u03c3\u03b7\u03c2 \u03bd\u03b1 \u03c3\u03b1\u03c2 \u03b4\u03ce\u03c3\u03b5\u03b9 \u03bc\u03b5\u03c1\u03b9\u03ba\u03ad\u03c2 \u03b1\u03ba\u03cc\u03bc\u03b7 \u0395\u03be\u03b1\u03b9\u03c1\u03ad\u03c3\u03b5\u03b9\u03c2 \u03c0\u03bf\u03c5 \u03b4\u03b5\u03bd \u03b8\u03b1 \u03b5\u03af\u03bd\u03b1\u03b9 \u03b5\u03cd\u03ba\u03bf\u03bb\u03bf \u03bd\u03b1 \u03b5\u03bd\u03c4\u03bf\u03c0\u03b9\u03c3\u03c4\u03bf\u03cd\u03bd.<\/p>\n\n\n\n<p>\u0393\u03b9\u03b1 \u03bd\u03b1 \u03bb\u03cd\u03c3\u03b5\u03c4\u03b5 <code>ConcurrentModificationException<\/code> \u03c3\u03b5 \u03ad\u03bd\u03b1 \u03c3\u03b5\u03bd\u03ac\u03c1\u03b9\u03bf \u03b5\u03bd\u03cc\u03c2 \u03bd\u03ae\u03bc\u03b1\u03c4\u03bf\u03c2. \u03b8\u03b1 \u03bc\u03c0\u03bf\u03c1\u03bf\u03cd\u03c3\u03b1\u03c4\u03b5 \u03b5\u03c0\u03af\u03c3\u03b7\u03c2 \u03bd\u03b1 \u03bc\u03b5\u03c4\u03b1\u03b2\u03b5\u03af\u03c4\u03b5 \u03c3\u03c4\u03b7 \u03c7\u03c1\u03ae\u03c3\u03b7 \u03b1\u03c0\u03b5\u03c5\u03b8\u03b5\u03af\u03b1\u03c2 <code>\u0395\u03c0\u03b1\u03bd\u03b1\u03bb\u03ae\u03c0\u03c4\u03b7\u03c2<\/code> \u03ba\u03b1\u03b9 \u03c4\u03bf <code>remove()<\/code> \u03ae \u03bc\u03c0\u03bf\u03c1\u03b5\u03af\u03c4\u03b5 \u03b1\u03c0\u03bb\u03ac \u03bd\u03b1 \u03bc\u03b7\u03bd \u03b1\u03c6\u03b1\u03b9\u03c1\u03b5\u03af\u03c4\u03b5 \u03c3\u03c4\u03bf\u03b9\u03c7\u03b5\u03af\u03b1 \u03ba\u03b1\u03c4\u03ac \u03c4\u03b7 \u03b4\u03b9\u03ac\u03c1\u03ba\u03b5\u03b9\u03b1 \u03c4\u03b7\u03c2 \u03b5\u03c0\u03b1\u03bd\u03ac\u03bb\u03b7\u03c8\u03b7\u03c2. \u03a9\u03c3\u03c4\u03cc\u03c3\u03bf, \u03b7 \u03c3\u03cd\u03c3\u03c4\u03b1\u03c3\u03ae \u03bc\u03bf\u03c5 \u03b5\u03af\u03bd\u03b1\u03b9 \u03bd\u03b1 \u03c7\u03c1\u03b7\u03c3\u03b9\u03bc\u03bf\u03c0\u03bf\u03b9\u03ae\u03c3\u03b5\u03c4\u03b5 <code>\u03a1\u03b5\u03cd\u03bc\u03b1\u03c4\u03b1<\/code> - \u03b5\u03af\u03bd\u03b1\u03b9 \u03c4\u03bf 2022.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">2. \u0391\u03c0\u03bf\u03b8\u03ae\u03ba\u03b5\u03c5\u03c3\u03b7 \u03ba\u03c9\u03b4\u03b9\u03ba\u03ce\u03bd \u03c0\u03c1\u03cc\u03c3\u03b2\u03b1\u03c3\u03b7\u03c2 \u03c9\u03c2 \u03c3\u03c5\u03bc\u03b2\u03bf\u03bb\u03bf\u03c3\u03b5\u03b9\u03c1\u03ad\u03c2<\/h2>\n\n\n\n<p>\u039a\u03b1\u03b8\u03ce\u03c2 \u03b1\u03c3\u03c7\u03bf\u03bb\u03bf\u03cd\u03bc\u03b1\u03b9 \u03cc\u03bb\u03bf \u03ba\u03b1\u03b9 \u03c0\u03b5\u03c1\u03b9\u03c3\u03c3\u03cc\u03c4\u03b5\u03c1\u03bf \u03bc\u03b5 \u03c4\u03b7\u03bd \u03ba\u03c5\u03b2\u03b5\u03c1\u03bd\u03bf\u03b1\u03c3\u03c6\u03ac\u03bb\u03b5\u03b9\u03b1, \u03b4\u03b5\u03bd \u03b8\u03b1 \u03ae\u03bc\u03bf\u03c5\u03bd \u03c0\u03b9\u03c3\u03c4\u03cc\u03c2 \u03c3\u03c4\u03bf\u03bd \u03b5\u03b1\u03c5\u03c4\u03cc \u03bc\u03bf\u03c5 \u03b1\u03bd \u03b4\u03b5\u03bd \u03b1\u03bd\u03ad\u03c6\u03b5\u03c1\u03b1 \u03c4\u03bf\u03c5\u03bb\u03ac\u03c7\u03b9\u03c3\u03c4\u03bf\u03bd \u03ad\u03bd\u03b1 <strong>\u039b\u03ac\u03b8\u03bf\u03c2 \u03c4\u03b7\u03c2 Java<\/strong> \u03c0\u03bf\u03c5 \u03bc\u03c0\u03bf\u03c1\u03b5\u03af \u03bd\u03b1 \u03bf\u03b4\u03b7\u03b3\u03ae\u03c3\u03b5\u03b9 \u03c3\u03b5 \u03b6\u03ae\u03c4\u03b7\u03bc\u03b1 \u03b1\u03c3\u03c6\u03ac\u03bb\u03b5\u03b9\u03b1\u03c2. \u0397 \u03b1\u03c0\u03bf\u03b8\u03ae\u03ba\u03b5\u03c5\u03c3\u03b7 \u03c4\u03c9\u03bd \u03ba\u03c9\u03b4\u03b9\u03ba\u03ce\u03bd \u03c0\u03c1\u03cc\u03c3\u03b2\u03b1\u03c3\u03b7\u03c2 \u03c0\u03bf\u03c5 \u03bb\u03b1\u03bc\u03b2\u03ac\u03bd\u03bf\u03bd\u03c4\u03b1\u03b9 \u03b1\u03c0\u03cc \u03c4\u03bf\u03c5\u03c2 \u03c7\u03c1\u03ae\u03c3\u03c4\u03b5\u03c2 \u03c3\u03b5 \u03ad\u03bd\u03b1 <code>\u03a3\u03c5\u03bc\u03b2\u03bf\u03bb\u03bf\u03c3\u03b5\u03b9\u03c1\u03ac<\/code> \u03b1\u03bd\u03c4\u03b9\u03ba\u03b5\u03af\u03bc\u03b5\u03bd\u03bf \u03b5\u03af\u03bd\u03b1\u03b9 \u03b1\u03ba\u03c1\u03b9\u03b2\u03ce\u03c2 \u03ba\u03ac\u03c4\u03b9 \u03c0\u03bf\u03c5 \u03c0\u03c1\u03ad\u03c0\u03b5\u03b9 \u03bd\u03b1 \u03c6\u03bf\u03b2\u03ac\u03c3\u03c4\u03b5.<\/p>\n\n\n\n<p>\u03a4\u03bf \u03b6\u03ae\u03c4\u03b7\u03bc\u03b1 (\u03ae \u03af\u03c3\u03c9\u03c2 \u03c4\u03bf \u03c0\u03bb\u03b5\u03bf\u03bd\u03ad\u03ba\u03c4\u03b7\u03bc\u03b1) \u03c4\u03b7\u03c2 <code>\u03a3\u03c5\u03bc\u03b2\u03bf\u03bb\u03bf\u03c3\u03b5\u03b9\u03c1\u03ac<\/code> \u03b5\u03af\u03bd\u03b1\u03b9 \u03cc\u03c4\u03b9 \u03b5\u03af\u03bd\u03b1\u03b9 \u03b1\u03bc\u03b5\u03c4\u03ac\u03b2\u03bb\u03b7\u03c4\u03b7. \u03a3\u03c4\u03bf\u03bd \u03ba\u03cc\u03c3\u03bc\u03bf \u03c4\u03bf\u03c5 \u03ba\u03c5\u03b2\u03b5\u03c1\u03bd\u03bf\u03c7\u03ce\u03c1\u03bf\u03c5, \u03b1\u03c5\u03c4\u03cc \u03b4\u03b7\u03bc\u03b9\u03bf\u03c5\u03c1\u03b3\u03b5\u03af \u03bc\u03b9\u03b1 \u03c0\u03b9\u03b8\u03b1\u03bd\u03ae \u03b1\u03c0\u03b5\u03b9\u03bb\u03ae, \u03b1\u03c6\u03bf\u03cd \u03b4\u03b5\u03bd \u03bc\u03c0\u03bf\u03c1\u03b5\u03af\u03c4\u03b5 \u03bd\u03b1 \u03b4\u03b9\u03b1\u03b3\u03c1\u03ac\u03c8\u03b5\u03c4\u03b5 \u03c4\u03b7\u03bd \u03c4\u03b9\u03bc\u03ae \u03bc\u03b9\u03b1\u03c2 \u03ba\u03ac\u03c0\u03bf\u03c4\u03b5 \u03b4\u03b7\u03bc\u03b9\u03bf\u03c5\u03c1\u03b3\u03b7\u03b8\u03b5\u03af\u03c3\u03b1\u03c2 <code>\u03a3\u03c5\u03bc\u03b2\u03bf\u03bb\u03bf\u03c3\u03b5\u03b9\u03c1\u03ac<\/code> \u03b1\u03bd\u03c4\u03b9\u03ba\u03b5\u03af\u03bc\u03b5\u03bd\u03bf. \u039f \u03b5\u03c0\u03b9\u03c4\u03b9\u03b8\u03ad\u03bc\u03b5\u03bd\u03bf\u03c2 \u03c0\u03bf\u03c5 \u03b1\u03c0\u03bf\u03ba\u03c4\u03ac \u03c0\u03c1\u03cc\u03c3\u03b2\u03b1\u03c3\u03b7 \u03c3\u03c4\u03b7 \u03bc\u03bd\u03ae\u03bc\u03b7 \u03c4\u03bf\u03c5 \u03c5\u03c0\u03bf\u03bb\u03bf\u03b3\u03b9\u03c3\u03c4\u03ae \u03c3\u03b1\u03c2 \u03bc\u03c0\u03bf\u03c1\u03b5\u03af \u03bd\u03b1 \u03b2\u03c1\u03b5\u03b9 \u03b5\u03ba\u03b5\u03af \u03ba\u03c9\u03b4\u03b9\u03ba\u03bf\u03cd\u03c2 \u03c0\u03c1\u03cc\u03c3\u03b2\u03b1\u03c3\u03b7\u03c2 \u03b1\u03c0\u03bb\u03bf\u03cd \u03ba\u03b5\u03b9\u03bc\u03ad\u03bd\u03bf\u03c5.<\/p>\n\n\n\n<p>\u0394\u03b5\u03cd\u03c4\u03b5\u03c1\u03bf\u03bd, \u03bf\u03b9 \u03c7\u03bf\u03c1\u03b4\u03ad\u03c2 \u03c3\u03b5 <strong>Java<\/strong> \u03b5\u03c3\u03c9\u03c4\u03b5\u03c1\u03b9\u03ba\u03b5\u03cd\u03bf\u03bd\u03c4\u03b1\u03b9 \u03b1\u03c0\u03cc \u03c4\u03bf JVM \u03ba\u03b1\u03b9 \u03b1\u03c0\u03bf\u03b8\u03b7\u03ba\u03b5\u03cd\u03bf\u03bd\u03c4\u03b1\u03b9 \u03c3\u03c4\u03bf \u03c7\u03ce\u03c1\u03bf PermGen \u03ae \u03c3\u03c4\u03bf \u03c7\u03ce\u03c1\u03bf \u03c3\u03c9\u03c1\u03bf\u03cd. \u038c\u03c4\u03b1\u03bd \u03b4\u03b7\u03bc\u03b9\u03bf\u03c5\u03c1\u03b3\u03b5\u03af\u03c4\u03b5 \u03ad\u03bd\u03b1 <code>\u03a3\u03c5\u03bc\u03b2\u03bf\u03bb\u03bf\u03c3\u03b5\u03b9\u03c1\u03ac<\/code> \u03b1\u03bd\u03c4\u03b9\u03ba\u03b5\u03af\u03bc\u03b5\u03bd\u03bf, \u03b1\u03c0\u03bf\u03b8\u03b7\u03ba\u03b5\u03cd\u03b5\u03c4\u03b1\u03b9 \u03c3\u03c4\u03b7\u03bd \u03c0\u03c1\u03bf\u03c3\u03c9\u03c1\u03b9\u03bd\u03ae \u03bc\u03bd\u03ae\u03bc\u03b7 \u03ba\u03b1\u03b9 \u03b1\u03c6\u03b1\u03b9\u03c1\u03b5\u03af\u03c4\u03b1\u03b9 \u03bc\u03cc\u03bd\u03bf \u03cc\u03c4\u03b1\u03bd \u03bf \u03a3\u03c5\u03bb\u03bb\u03ad\u03ba\u03c4\u03b7\u03c2 \u03c3\u03ba\u03bf\u03c5\u03c0\u03b9\u03b4\u03b9\u03ce\u03bd \u03b1\u03c1\u03c7\u03af\u03c3\u03b5\u03b9 \u03bd\u03b1 \u03ba\u03ac\u03bd\u03b5\u03b9 \u03c4\u03b7 \u03b4\u03bf\u03c5\u03bb\u03b5\u03b9\u03ac \u03c4\u03bf\u03c5. \u0394\u03b5\u03bd \u03bc\u03c0\u03bf\u03c1\u03b5\u03af\u03c4\u03b5 \u03bd\u03b1 \u03b5\u03af\u03c3\u03c4\u03b5 \u03c3\u03af\u03b3\u03bf\u03c5\u03c1\u03bf\u03b9 \u03c0\u03cc\u03c4\u03b5 \u03bf \u03ba\u03c9\u03b4\u03b9\u03ba\u03cc\u03c2 \u03c3\u03b1\u03c2 \u03b4\u03b9\u03b1\u03b3\u03c1\u03ac\u03c6\u03b5\u03c4\u03b1\u03b9 \u03b1\u03c0\u03cc \u03c4\u03b7 \u03b4\u03b5\u03be\u03b1\u03bc\u03b5\u03bd\u03ae String, \u03ba\u03b1\u03b8\u03ce\u03c2 \u03bf \u03a3\u03c5\u03bb\u03bb\u03ad\u03ba\u03c4\u03b7\u03c2 \u03a3\u03ba\u03bf\u03c5\u03c0\u03b9\u03b4\u03b9\u03ce\u03bd \u03bb\u03b5\u03b9\u03c4\u03bf\u03c5\u03c1\u03b3\u03b5\u03af \u03bc\u03b5 \u03bc\u03b7 \u03bd\u03c4\u03b5\u03c4\u03b5\u03c1\u03bc\u03b9\u03bd\u03b9\u03c3\u03c4\u03b9\u03ba\u03cc \u03c4\u03c1\u03cc\u03c0\u03bf.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u03a0\u03ce\u03c2 \u03bd\u03b1 \u03c4\u03bf \u03b1\u03c0\u03bf\u03c6\u03cd\u03b3\u03b5\u03c4\u03b5;<\/h3>\n\n\n\n<p>\u0397 \u03c3\u03c5\u03bd\u03b9\u03c3\u03c4\u03ce\u03bc\u03b5\u03bd\u03b7 \u03c0\u03c1\u03bf\u03c3\u03ad\u03b3\u03b3\u03b9\u03c3\u03b7 \u03b5\u03af\u03bd\u03b1\u03b9 \u03b7 \u03c7\u03c1\u03ae\u03c3\u03b7 <code>char[]<\/code> \u03ae, \u03b1\u03ba\u03cc\u03bc\u03b1 \u03ba\u03b1\u03bb\u03cd\u03c4\u03b5\u03c1\u03b1, \u03b7 \u03b2\u03b9\u03b2\u03bb\u03b9\u03bf\u03b8\u03ae\u03ba\u03b7 \u03c0\u03bf\u03c5 \u03c5\u03c0\u03bf\u03c3\u03c4\u03b7\u03c1\u03af\u03b6\u03b5\u03b9 \u03c4\u03b7\u03bd \u03b1\u03c0\u03bf\u03b8\u03ae\u03ba\u03b5\u03c5\u03c3\u03b7 \u03ba\u03c9\u03b4\u03b9\u03ba\u03ce\u03bd \u03c0\u03c1\u03cc\u03c3\u03b2\u03b1\u03c3\u03b7\u03c2 \u03c9\u03c2 <code>char[]<\/code>, \u03c0.\u03c7.<a href=\"https:\/\/github.com\/Password4j\/password4j\">Password4j<\/a>. \u03a4\u03bf <code>char[]<\/code> \u03b5\u03af\u03bd\u03b1\u03b9 \u03bc\u03b5\u03c4\u03b1\u03b2\u03bb\u03b7\u03c4\u03cc\u03c2 \u03ba\u03b1\u03b9 \u03bc\u03c0\u03bf\u03c1\u03b5\u03af \u03bd\u03b1 \u03c4\u03c1\u03bf\u03c0\u03bf\u03c0\u03bf\u03b9\u03b7\u03b8\u03b5\u03af \u03bc\u03b5\u03c4\u03ac \u03c4\u03b7\u03bd \u03b1\u03c1\u03c7\u03b9\u03ba\u03bf\u03c0\u03bf\u03af\u03b7\u03c3\u03ae \u03c4\u03bf\u03c5. \u039c\u03b5\u03c4\u03ac \u03c4\u03b7\u03bd \u03b5\u03c0\u03b5\u03be\u03b5\u03c1\u03b3\u03b1\u03c3\u03af\u03b1 \u03b5\u03bd\u03cc\u03c2 \u03ba\u03c9\u03b4\u03b9\u03ba\u03bf\u03cd \u03c0\u03c1\u03cc\u03c3\u03b2\u03b1\u03c3\u03b7\u03c2, \u03bc\u03c0\u03bf\u03c1\u03b5\u03af\u03c4\u03b5 \u03b1\u03c0\u03bb\u03ac \u03bd\u03b1 \u03b4\u03b9\u03b1\u03b3\u03c1\u03ac\u03c8\u03b5\u03c4\u03b5 \u03c4\u03b7\u03bd <code>char[]<\/code> \u03c0\u03af\u03bd\u03b1\u03ba\u03b1 \u03ba\u03c9\u03b4\u03b9\u03ba\u03ce\u03bd \u03c0\u03c1\u03cc\u03c3\u03b2\u03b1\u03c3\u03b7\u03c2 \u03b3\u03c1\u03ac\u03c6\u03bf\u03bd\u03c4\u03b1\u03c2 \u03c4\u03c5\u03c7\u03b1\u03af\u03b1 \u03b3\u03c1\u03ac\u03bc\u03bc\u03b1\u03c4\u03b1 \u03c3\u03b5 \u03b1\u03c5\u03c4\u03cc\u03bd. \u03a3\u03b5 \u03c0\u03b5\u03c1\u03af\u03c0\u03c4\u03c9\u03c3\u03b7 \u03c0\u03bf\u03c5 \u03bf\u03b9 \u03b5\u03c0\u03b9\u03c4\u03b9\u03b8\u03ad\u03bc\u03b5\u03bd\u03bf\u03b9 \u03b1\u03c0\u03bf\u03ba\u03c4\u03ae\u03c3\u03bf\u03c5\u03bd \u03c0\u03c1\u03cc\u03c3\u03b2\u03b1\u03c3\u03b7 \u03c3\u03c4\u03b7 \u03bc\u03bd\u03ae\u03bc\u03b7 \u03c4\u03bf\u03c5 \u03c5\u03c0\u03bf\u03bb\u03bf\u03b3\u03b9\u03c3\u03c4\u03ae \u03c3\u03b1\u03c2, \u03b8\u03b1 \u03b4\u03bf\u03c5\u03bd \u03bc\u03cc\u03bd\u03bf \u03ba\u03ac\u03c0\u03bf\u03b9\u03b5\u03c2 \u03c4\u03c5\u03c7\u03b1\u03af\u03b5\u03c2 \u03c4\u03b9\u03bc\u03ad\u03c2 \u03c0\u03bf\u03c5 \u03b4\u03b5\u03bd \u03ad\u03c7\u03bf\u03c5\u03bd \u03ba\u03b1\u03bc\u03af\u03b1 \u03c3\u03c7\u03ad\u03c3\u03b7 \u03bc\u03b5 \u03c4\u03bf\u03c5\u03c2 \u03ba\u03c9\u03b4\u03b9\u03ba\u03bf\u03cd\u03c2 \u03c0\u03c1\u03cc\u03c3\u03b2\u03b1\u03c3\u03b7\u03c2 \u03c4\u03c9\u03bd \u03c7\u03c1\u03b7\u03c3\u03c4\u03ce\u03bd.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">3. (\u039c\u03b7) \u03c7\u03b5\u03b9\u03c1\u03b9\u03c3\u03bc\u03cc\u03c2 \u03b5\u03be\u03b1\u03b9\u03c1\u03ad\u03c3\u03b5\u03c9\u03bd<\/h2>\n\n\n\n<p>\u039f\u03b9 \u03b1\u03c1\u03c7\u03ac\u03c1\u03b9\u03bf\u03b9 \u03b1\u03bb\u03bb\u03ac \u03ba\u03b1\u03b9 \u03bf\u03b9 \u03c0\u03b9\u03bf \u03c0\u03c1\u03bf\u03c7\u03c9\u03c1\u03b7\u03bc\u03ad\u03bd\u03bf\u03b9 \u03c0\u03c1\u03bf\u03b3\u03c1\u03b1\u03bc\u03bc\u03b1\u03c4\u03b9\u03c3\u03c4\u03ad\u03c2 \u03b4\u03b5\u03bd \u03b3\u03bd\u03c9\u03c1\u03af\u03b6\u03bf\u03c5\u03bd \u03c0\u03ce\u03c2 \u03bd\u03b1 \u03c7\u03b5\u03b9\u03c1\u03af\u03b6\u03bf\u03bd\u03c4\u03b1\u03b9 \u03c3\u03c9\u03c3\u03c4\u03ac \u03c4\u03b9\u03c2 \u03b5\u03be\u03b1\u03b9\u03c1\u03ad\u03c3\u03b5\u03b9\u03c2. \u03a4\u03bf \u03ba\u03cd\u03c1\u03b9\u03bf \u03b1\u03bc\u03ac\u03c1\u03c4\u03b7\u03bc\u03ac \u03c4\u03bf\u03c5\u03c2 \u03c3\u03b5 \u03b1\u03c5\u03c4\u03cc \u03c4\u03bf \u03b8\u03ad\u03bc\u03b1 \u03b5\u03af\u03bd\u03b1\u03b9 \u03bd\u03b1 \u03c4\u03b9\u03c2 \u03b1\u03b3\u03bd\u03bf\u03bf\u03cd\u03bd. \u0391\u03a5\u03a4\u038c \u0394\u0395\u039d \u0395\u038a\u039d\u0391\u0399 \u03a0\u039f\u03a4\u0388 \u039c\u0399\u0391 \u039a\u0391\u039b\u0389 \u03a0\u03a1\u039f\u03a3\u0388\u0393\u0393\u0399\u03a3\u0397.<\/p>\n\n\n\n<p>\u0394\u03c5\u03c3\u03c4\u03c5\u03c7\u03ce\u03c2, \u03b4\u03b5\u03bd \u03bc\u03c0\u03bf\u03c1\u03bf\u03cd\u03bc\u03b5 \u03bd\u03b1 \u03c3\u03b1\u03c2 \u03b4\u03ce\u03c3\u03bf\u03c5\u03bc\u03b5 \u03bc\u03b9\u03b1 \u03b1\u03c3\u03b7\u03bc\u03ad\u03bd\u03b9\u03b1 \u03bb\u03cd\u03c3\u03b7 \u03c0\u03bf\u03c5 \u03b8\u03b1 \u03c4\u03b1\u03b9\u03c1\u03b9\u03ac\u03b6\u03b5\u03b9 \u03c3\u03b5 \u03ba\u03ac\u03b8\u03b5 <code>\u0395\u03be\u03b1\u03af\u03c1\u03b5\u03c3\u03b7<\/code>\u03c3\u03b5\u03bd\u03ac\u03c1\u03b9\u03bf \u03c0\u03bf\u03c5 \u03c3\u03c5\u03bd\u03b1\u03bd\u03c4\u03ac\u03c4\u03b5. \u03a0\u03c1\u03ad\u03c0\u03b5\u03b9 \u03bd\u03b1 \u03c3\u03ba\u03b5\u03c6\u03c4\u03b5\u03af\u03c4\u03b5 \u03ba\u03ac\u03b8\u03b5 \u03c0\u03b5\u03c1\u03af\u03c0\u03c4\u03c9\u03c3\u03b7 \u03be\u03b5\u03c7\u03c9\u03c1\u03b9\u03c3\u03c4\u03ac. \u03a9\u03c3\u03c4\u03cc\u03c3\u03bf, \u03bc\u03c0\u03bf\u03c1\u03bf\u03cd\u03bc\u03b5 \u03bd\u03b1 \u03c3\u03b1\u03c2 \u03b4\u03ce\u03c3\u03bf\u03c5\u03bc\u03b5 \u03ba\u03ac\u03c0\u03bf\u03b9\u03b5\u03c2 \u03c3\u03c5\u03bc\u03b2\u03bf\u03c5\u03bb\u03ad\u03c2 \u03b3\u03b9\u03b1 \u03c4\u03bf \u03c0\u03ce\u03c2 \u03bd\u03b1 \u03be\u03b5\u03ba\u03b9\u03bd\u03ae\u03c3\u03b5\u03c4\u03b5 \u03bc\u03b5 \u03b1\u03c5\u03c4\u03cc \u03c4\u03bf \u03b8\u03ad\u03bc\u03b1.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u03a0\u03ce\u03c2 \u03bc\u03c0\u03bf\u03c1\u03ce \u03bd\u03b1 \u03c4\u03bf \u03b1\u03c0\u03bf\u03c6\u03cd\u03b3\u03c9;<\/h3>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\n<p>\u0391\u03b3\u03bd\u03bf\u03ce\u03bd\u03c4\u03b1\u03c2 \u03c4\u03bf <code>\u0395\u03be\u03b1\u03af\u03c1\u03b5\u03c3\u03b7<\/code>s \u03b4\u03b5\u03bd \u03b5\u03af\u03bd\u03b1\u03b9 \u03c0\u03bf\u03c4\u03ad \u03ba\u03b1\u03bb\u03ae \u03c0\u03c1\u03b1\u03ba\u03c4\u03b9\u03ba\u03ae. <code>\u0395\u03be\u03b1\u03af\u03c1\u03b5\u03c3\u03b7<\/code>\u03b5\u03b9\u03c3\u03ac\u03b3\u03bf\u03bd\u03c4\u03b1\u03b9 \u03b3\u03b9\u03b1 \u03ba\u03ac\u03c0\u03bf\u03b9\u03bf \u03bb\u03cc\u03b3\u03bf, \u03bf\u03c0\u03cc\u03c4\u03b5 \u03b4\u03b5\u03bd \u03c0\u03c1\u03ad\u03c0\u03b5\u03b9 \u03bd\u03b1 \u03c4\u03b1 \u03b1\u03b3\u03bd\u03bf\u03ae\u03c3\u03b5\u03c4\u03b5.<\/p>\n<\/li>\n\n\n\n<li>\n<p><code>try {...} catch(Exception e) { log(e); }<\/code> \u03b5\u03af\u03bd\u03b1\u03b9 \u03c3\u03c0\u03ac\u03bd\u03b9\u03b1 \u03b7 \u03c3\u03c9\u03c3\u03c4\u03ae \u03c0\u03c1\u03bf\u03c3\u03ad\u03b3\u03b3\u03b9\u03c3\u03b7 \u03b3\u03b9\u03b1 <code>\u0395\u03be\u03b1\u03af\u03c1\u03b5\u03c3\u03b7<\/code> \u03c7\u03b5\u03b9\u03c1\u03b9\u03c3\u03bc\u03cc\u03c2.<\/p>\n<\/li>\n\n\n\n<li>\n<p>\u03a1\u03af\u03c8\u03b7 <code>\u0395\u03be\u03b1\u03af\u03c1\u03b5\u03c3\u03b7<\/code>, \u03b5\u03bc\u03c6\u03b1\u03bd\u03af\u03b6\u03b5\u03b9 \u03ad\u03bd\u03b1 \u03c0\u03b1\u03c1\u03ac\u03b8\u03c5\u03c1\u03bf \u03b4\u03b9\u03b1\u03bb\u03cc\u03b3\u03bf\u03c5 \u03c3\u03c6\u03ac\u03bb\u03bc\u03b1\u03c4\u03bf\u03c2 \u03c3\u03c4\u03bf \u03c7\u03c1\u03ae\u03c3\u03c4\u03b7 \u03ae \u03c4\u03bf\u03c5\u03bb\u03ac\u03c7\u03b9\u03c3\u03c4\u03bf\u03bd \u03c0\u03c1\u03bf\u03c3\u03b8\u03ad\u03c4\u03b5\u03b9 \u03ad\u03bd\u03b1 \u03c0\u03b5\u03c1\u03b9\u03b5\u03ba\u03c4\u03b9\u03ba\u03cc \u03bc\u03ae\u03bd\u03c5\u03bc\u03b1 \u03c3\u03c4\u03bf \u03b1\u03c1\u03c7\u03b5\u03af\u03bf \u03ba\u03b1\u03c4\u03b1\u03b3\u03c1\u03b1\u03c6\u03ae\u03c2.<\/p>\n<\/li>\n\n\n\n<li>\n<p>\u0391\u03bd \u03b1\u03c6\u03ae\u03c3\u03b1\u03c4\u03b5 \u03c4\u03b9\u03c2 \u03b5\u03be\u03b1\u03b9\u03c1\u03ad\u03c3\u03b5\u03b9\u03c2 \u03c3\u03b1\u03c2 \u03c7\u03c9\u03c1\u03af\u03c2 \u03c7\u03b5\u03b9\u03c1\u03b9\u03c3\u03bc\u03cc (\u03c0\u03c1\u03ac\u03b3\u03bc\u03b1 \u03c0\u03bf\u03c5 \u03b4\u03b5\u03bd \u03b8\u03b1 \u03ad\u03c0\u03c1\u03b5\u03c0\u03b5), \u03c4\u03bf\u03c5\u03bb\u03ac\u03c7\u03b9\u03c3\u03c4\u03bf\u03bd \u03b5\u03be\u03b7\u03b3\u03ae\u03c3\u03c4\u03b5 \u03c4\u03bf \u03c3\u03c4\u03bf \u03c3\u03c7\u03cc\u03bb\u03b9\u03bf.<\/p>\n<\/li>\n<\/ol>\n\n\n\n<h2 class=\"wp-block-heading\">4. \u03a7\u03c1\u03ae\u03c3\u03b7 null<\/h2>\n\n\n\n<p>\u0394\u03c5\u03c3\u03c4\u03c5\u03c7\u03ce\u03c2, \u03b5\u03af\u03bd\u03b1\u03b9 \u03b1\u03c1\u03ba\u03b5\u03c4\u03ac \u03c3\u03c5\u03bd\u03b7\u03b8\u03b9\u03c3\u03bc\u03ad\u03bd\u03bf \u03bd\u03b1 \u03b2\u03c1\u03af\u03c3\u03ba\u03bf\u03c5\u03bc\u03b5 \u03bc\u03b9\u03b1 \u03c3\u03c5\u03bd\u03ac\u03c1\u03c4\u03b7\u03c3\u03b7 Java \u03c0\u03bf\u03c5 \u03c3\u03b5 \u03bf\u03c1\u03b9\u03c3\u03bc\u03ad\u03bd\u03b5\u03c2 \u03c0\u03b5\u03c1\u03b9\u03c0\u03c4\u03ce\u03c3\u03b5\u03b9\u03c2 \u03b5\u03c0\u03b9\u03c3\u03c4\u03c1\u03ad\u03c6\u03b5\u03b9 \u03ad\u03bd\u03b1 <code>null<\/code>. \u03a4\u03bf \u03c0\u03c1\u03cc\u03b2\u03bb\u03b7\u03bc\u03b1 \u03b5\u03af\u03bd\u03b1\u03b9 \u03cc\u03c4\u03b9 \u03bc\u03b9\u03b1 \u03c4\u03ad\u03c4\u03bf\u03b9\u03b1 \u03c3\u03c5\u03bd\u03ac\u03c1\u03c4\u03b7\u03c3\u03b7 \u03b5\u03c0\u03b9\u03b2\u03ac\u03bb\u03bb\u03b5\u03b9 \u03c3\u03c4\u03bf\u03bd \u03c0\u03b5\u03bb\u03ac\u03c4\u03b7 \u03c4\u03b7\u03c2 \u03bd\u03b1 \u03b5\u03ba\u03c4\u03b5\u03bb\u03b5\u03af \u03ad\u03bb\u03b5\u03b3\u03c7\u03bf null \u03c3\u03c4\u03bf \u03b1\u03c0\u03bf\u03c4\u03ad\u03bb\u03b5\u03c3\u03bc\u03b1. \u03a7\u03c9\u03c1\u03af\u03c2 \u03b1\u03c5\u03c4\u03cc, \u03b7 <code>NullPointerException<\/code> \u03b1\u03c0\u03bf\u03c1\u03c1\u03af\u03c0\u03c4\u03b5\u03c4\u03b1\u03b9.<\/p>\n\n\n\n<p>\u03a4\u03bf \u03ac\u03bb\u03bb\u03bf \u03c0\u03c1\u03ac\u03b3\u03bc\u03b1 \u03b5\u03af\u03bd\u03b1\u03b9 \u03c4\u03bf \u03c0\u03ad\u03c1\u03b1\u03c3\u03bc\u03b1 \u03b5\u03bd\u03cc\u03c2 <code>null<\/code> \u03b1\u03be\u03af\u03b1. \u0393\u03b9\u03b1\u03c4\u03af \u03c4\u03bf \u03c3\u03ba\u03ad\u03c6\u03c4\u03b7\u03ba\u03b5\u03c2 \u03b1\u03c5\u03c4\u03cc; \u03a3\u03b5 \u03bc\u03b9\u03b1 \u03c4\u03ad\u03c4\u03bf\u03b9\u03b1 \u03c0\u03b5\u03c1\u03af\u03c0\u03c4\u03c9\u03c3\u03b7, \u03b7 \u03c3\u03c5\u03bd\u03ac\u03c1\u03c4\u03b7\u03c3\u03b7 \u03c0\u03c1\u03ad\u03c0\u03b5\u03b9 \u03bd\u03b1 \u03b5\u03ba\u03c4\u03b5\u03bb\u03ad\u03c3\u03b5\u03b9 \u03ad\u03bd\u03b1\u03bd \u03ad\u03bb\u03b5\u03b3\u03c7\u03bf null. \u038c\u03c4\u03b1\u03bd \u03c7\u03c1\u03b7\u03c3\u03b9\u03bc\u03bf\u03c0\u03bf\u03b9\u03b5\u03af\u03c4\u03b5 \u03b2\u03b9\u03b2\u03bb\u03b9\u03bf\u03b8\u03ae\u03ba\u03b5\u03c2 \u03c4\u03c1\u03af\u03c4\u03c9\u03bd \u03ba\u03b1\u03c4\u03b1\u03c3\u03ba\u03b5\u03c5\u03b1\u03c3\u03c4\u03ce\u03bd, \u03b4\u03b5\u03bd \u03bc\u03c0\u03bf\u03c1\u03b5\u03af\u03c4\u03b5 \u03bd\u03b1 \u03b1\u03bb\u03bb\u03ac\u03be\u03b5\u03c4\u03b5 \u03c4\u03bf \u03b5\u03c3\u03c9\u03c4\u03b5\u03c1\u03b9\u03ba\u03cc \u03c4\u03c9\u03bd \u03c3\u03c5\u03bd\u03b1\u03c1\u03c4\u03ae\u03c3\u03b5\u03c9\u03bd. \u03a4\u03b9 \u03b3\u03af\u03bd\u03b5\u03c4\u03b1\u03b9 \u03c4\u03cc\u03c4\u03b5;<\/p>\n\n\n\n<p>\u03a4\u03bf \u03c0\u03b9\u03bf \u03c3\u03b7\u03bc\u03b1\u03bd\u03c4\u03b9\u03ba\u03cc \u03b5\u03af\u03bd\u03b1\u03b9 \u03cc\u03c4\u03b9 \u03ac\u03bb\u03bb\u03bf\u03b9 \u03c0\u03c1\u03bf\u03b3\u03c1\u03b1\u03bc\u03bc\u03b1\u03c4\u03b9\u03c3\u03c4\u03ad\u03c2 \u03c0\u03bf\u03c5 \u03b4\u03b9\u03b1\u03b2\u03ac\u03b6\u03bf\u03c5\u03bd \u03c4\u03bf\u03bd \u03ba\u03ce\u03b4\u03b9\u03ba\u03ac \u03c3\u03b1\u03c2 \u03ba\u03b1\u03b9 \u03b2\u03bb\u03ad\u03c0\u03bf\u03c5\u03bd \u03cc\u03c4\u03b9 \u03c0\u03b5\u03c1\u03bd\u03ac\u03c4\u03b5 <code>null<\/code> \u03b8\u03b1 \u03b1\u03c0\u03bf\u03c0\u03c1\u03bf\u03c3\u03b1\u03bd\u03b1\u03c4\u03bf\u03bb\u03b9\u03c3\u03c4\u03bf\u03cd\u03bd \u03c0\u03b9\u03b8\u03b1\u03bd\u03ce\u03c2 \u03c9\u03c2 \u03c0\u03c1\u03bf\u03c2 \u03c4\u03bf \u03b3\u03b9\u03b1\u03c4\u03af \u03b5\u03c0\u03b9\u03bb\u03ad\u03be\u03b1\u03c4\u03b5 \u03ad\u03bd\u03b1\u03bd \u03c4\u03cc\u03c3\u03bf \u03c0\u03b1\u03c1\u03ac\u03be\u03b5\u03bd\u03bf \u03c4\u03c1\u03cc\u03c0\u03bf \u03b3\u03b9\u03b1 \u03bd\u03b1 \u03c5\u03bb\u03bf\u03c0\u03bf\u03b9\u03ae\u03c3\u03b5\u03c4\u03b5 \u03c4\u03b7 \u03bb\u03b5\u03b9\u03c4\u03bf\u03c5\u03c1\u03b3\u03af\u03b1 \u03c3\u03b1\u03c2.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u03a0\u03ce\u03c2 \u03bc\u03c0\u03bf\u03c1\u03ce \u03bd\u03b1 \u03c4\u03bf \u03b1\u03c0\u03bf\u03c6\u03cd\u03b3\u03c9;<\/h3>\n\n\n\n<p>\u039c\u03b7\u03bd \u03b5\u03c0\u03b9\u03c3\u03c4\u03c1\u03ad\u03c6\u03b5\u03c4\u03b5 \u03ad\u03bd\u03b1 <code>null<\/code> \u03b1\u03be\u03af\u03b1! \u03a0\u03bf\u03c4\u03ad! \u03a3\u03b5 \u03c0\u03b5\u03c1\u03af\u03c0\u03c4\u03c9\u03c3\u03b7 \u03c0\u03bf\u03c5 \u03b7 \u03c3\u03c5\u03bd\u03ac\u03c1\u03c4\u03b7\u03c3\u03ae \u03c3\u03b1\u03c2 \u03b5\u03c0\u03b9\u03c3\u03c4\u03c1\u03ad\u03c6\u03b5\u03b9 \u03ba\u03ac\u03c0\u03bf\u03b9\u03bf \u03b5\u03af\u03b4\u03bf\u03c2 <code>\u03a3\u03c5\u03bb\u03bb\u03bf\u03b3\u03ae<\/code>, \u03bc\u03c0\u03bf\u03c1\u03b5\u03af\u03c4\u03b5 \u03b1\u03c0\u03bb\u03ac \u03bd\u03b1 \u03b5\u03c0\u03b9\u03c3\u03c4\u03c1\u03ad\u03c8\u03b5\u03c4\u03b5 \u03ad\u03bd\u03b1 \u03ba\u03b5\u03bd\u03cc <code>\u03a3\u03c5\u03bb\u03bb\u03bf\u03b3\u03ae<\/code>. \u0391\u03bd \u03b1\u03c3\u03c7\u03bf\u03bb\u03b5\u03af\u03c3\u03c4\u03b5 \u03bc\u03b5 \u03bc\u03b5\u03bc\u03bf\u03bd\u03c9\u03bc\u03ad\u03bd\u03b1 \u03b1\u03bd\u03c4\u03b9\u03ba\u03b5\u03af\u03bc\u03b5\u03bd\u03b1, \u03bc\u03c0\u03bf\u03c1\u03b5\u03af\u03c4\u03b5 \u03bd\u03b1 \u03c7\u03c1\u03b7\u03c3\u03b9\u03bc\u03bf\u03c0\u03bf\u03b9\u03ae\u03c3\u03b5\u03c4\u03b5 \u03c4\u03bf \u03c0\u03c1\u03cc\u03c4\u03c5\u03c0\u03bf \u03c3\u03c7\u03b5\u03b4\u03af\u03b1\u03c3\u03b7\u03c2 null object. \u0391\u03c0\u03cc \u03c4\u03b7 \u03c3\u03c4\u03b9\u03b3\u03bc\u03ae \u03c0\u03bf\u03c5 \u03c4\u03bf <strong>Java<\/strong> 8, \u03c5\u03bb\u03bf\u03c0\u03bf\u03b9\u03b5\u03af\u03c4\u03b1\u03b9 \u03c9\u03c2 \u03b5\u03be\u03ae\u03c2 <code>\u03a0\u03c1\u03bf\u03b1\u03b9\u03c1\u03b5\u03c4\u03b9\u03ba\u03cc<\/code>. \u0395\u03ba\u03c4\u03cc\u03c2 \u03b1\u03c0\u03cc \u03b1\u03c5\u03c4\u03cc, \u03b7 \u03bb\u03b9\u03b3\u03cc\u03c4\u03b5\u03c1\u03bf \u03c3\u03c5\u03bd\u03b9\u03c3\u03c4\u03ce\u03bc\u03b5\u03bd\u03b7 \u03c0\u03c1\u03bf\u03c3\u03ad\u03b3\u03b3\u03b9\u03c3\u03b7 \u03c0\u03b5\u03c1\u03b9\u03bb\u03b1\u03bc\u03b2\u03ac\u03bd\u03b5\u03b9 \u03c4\u03b7\u03bd \u03ad\u03b3\u03b5\u03c1\u03c3\u03b7 \u03b5\u03bd\u03cc\u03c2 <code>\u0395\u03be\u03b1\u03af\u03c1\u03b5\u03c3\u03b7<\/code>.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">5. \u0392\u03b1\u03c1\u03b9\u03ac \u03c3\u03c5\u03bd\u03ad\u03bd\u03c9\u03c3\u03b7 \u03b1\u03bb\u03c6\u03b1\u03c1\u03b9\u03b8\u03bc\u03b7\u03c4\u03b9\u03ba\u03ce\u03bd<\/h2>\n\n\n\n<p>\u0395\u03bb\u03c0\u03af\u03b6\u03c9 \u03bd\u03b1 \u03bc\u03b7\u03bd \u03b5\u03af\u03bd\u03b1\u03b9 \u03ad\u03bd\u03b1 \u03bb\u03ac\u03b8\u03bf\u03c2 \u03c0\u03bf\u03c5 \u03b8\u03b1 \u03ba\u03ac\u03bd\u03b5\u03c4\u03b5, \u03b4\u03b5\u03b4\u03bf\u03bc\u03ad\u03bd\u03bf\u03c5 \u03cc\u03c4\u03b9 \u03b5\u03af\u03bd\u03b1\u03b9 \u03b7 \u03c0\u03b9\u03bf \u03b4\u03b7\u03bc\u03bf\u03c6\u03b9\u03bb\u03ae\u03c2 (\u03ae \u03af\u03c3\u03c9\u03c2 \u03b7 \u03b4\u03b5\u03cd\u03c4\u03b5\u03c1\u03b7 \u03c0\u03b9\u03bf \u03b4\u03b7\u03bc\u03bf\u03c6\u03b9\u03bb\u03ae\u03c2 \u03bc\u03b5\u03c4\u03ac \u03c4\u03bf FizzBuzz) \u03b5\u03c1\u03ce\u03c4\u03b7\u03c3\u03b7 \u03c3\u03c5\u03bd\u03ad\u03bd\u03c4\u03b5\u03c5\u03be\u03b7\u03c2. \u038c\u03c0\u03c9\u03c2 \u03b8\u03b1 \u03c0\u03c1\u03ad\u03c0\u03b5\u03b9 \u03bd\u03b1 \u03b3\u03bd\u03c9\u03c1\u03af\u03b6\u03b5\u03c4\u03b5 \u03bc\u03ad\u03c7\u03c1\u03b9 \u03c4\u03ce\u03c1\u03b1, \u03bc\u03b9\u03b1 <code>\u03a3\u03c5\u03bc\u03b2\u03bf\u03bb\u03bf\u03c3\u03b5\u03b9\u03c1\u03ac<\/code> \u03b1\u03bd\u03c4\u03b9\u03ba\u03b5\u03af\u03bc\u03b5\u03bd\u03bf \u03b5\u03af\u03bd\u03b1\u03b9 \u03b1\u03bc\u03b5\u03c4\u03ac\u03b2\u03bb\u03b7\u03c4\u03bf \u03c3\u03c4\u03bf <strong>Java<\/strong> - \u03b1\u03c6\u03bf\u03cd \u03b4\u03b7\u03bc\u03b9\u03bf\u03c5\u03c1\u03b3\u03b7\u03b8\u03b5\u03af, \u03b4\u03b5\u03bd \u03bc\u03c0\u03bf\u03c1\u03b5\u03af \u03bd\u03b1 \u03c4\u03c1\u03bf\u03c0\u03bf\u03c0\u03bf\u03b9\u03b7\u03b8\u03b5\u03af. \u0388\u03c4\u03c3\u03b9, \u03b7 \u03c3\u03c5\u03bd\u03ad\u03bd\u03c9\u03c3\u03b7 \u03c4\u03c9\u03bd <code>\u03a3\u03c5\u03bc\u03b2\u03bf\u03bb\u03bf\u03c3\u03b5\u03b9\u03c1\u03ac<\/code> \u03c3\u03b7\u03bc\u03b1\u03af\u03bd\u03b5\u03b9 \u03c0\u03bf\u03bb\u03bb\u03ae \u03c0\u03b5\u03c1\u03b9\u03c4\u03c4\u03ae \u03ba\u03b1\u03c4\u03b1\u03bd\u03bf\u03bc\u03ae \u03bc\u03bd\u03ae\u03bc\u03b7\u03c2. \u03a3\u03c5\u03bd\u03b4\u03c5\u03b1\u03c3\u03bc\u03cc\u03c2 <code>\u03a3\u03c5\u03bc\u03b2\u03bf\u03bb\u03bf\u03c3\u03b5\u03b9\u03c1\u03ac<\/code> \u03b1\u03bd\u03c4\u03b9\u03ba\u03b5\u03af\u03bc\u03b5\u03bd\u03b1 \u03ba\u03ac\u03b8\u03b5 \u03c6\u03bf\u03c1\u03ac \u03b1\u03c0\u03b1\u03b9\u03c4\u03b5\u03af \u03c4\u03b7 \u03b4\u03b7\u03bc\u03b9\u03bf\u03c5\u03c1\u03b3\u03af\u03b1 \u03b5\u03bd\u03cc\u03c2 \u03c0\u03c1\u03bf\u03c3\u03c9\u03c1\u03b9\u03bd\u03bf\u03cd <code>StringBuilder<\/code> \u03b1\u03bd\u03c4\u03b9\u03ba\u03b5\u03af\u03bc\u03b5\u03bd\u03bf \u03ba\u03b1\u03b9 \u03c4\u03b7\u03bd \u03b1\u03bb\u03bb\u03b1\u03b3\u03ae \u03c4\u03bf\u03c5 \u03c0\u03af\u03c3\u03c9 \u03c3\u03b5 \u03c3\u03c5\u03bc\u03b2\u03bf\u03bb\u03bf\u03c3\u03b5\u03b9\u03c1\u03ac. \u0395\u03c0\u03bf\u03bc\u03ad\u03bd\u03c9\u03c2, \u03b1\u03c5\u03c4\u03ae \u03b7 \u03bb\u03cd\u03c3\u03b7 \u03b4\u03b5\u03bd \u03b5\u03af\u03bd\u03b1\u03b9 \u03b1\u03c0\u03bf\u03bb\u03cd\u03c4\u03c9\u03c2 \u03ba\u03b1\u03c4\u03ac\u03bb\u03bb\u03b7\u03bb\u03b7 \u03b1\u03bd \u03b8\u03ad\u03bb\u03bf\u03c5\u03bc\u03b5 \u03bd\u03b1 \u03c3\u03c5\u03bd\u03b4\u03c5\u03ac\u03c3\u03bf\u03c5\u03bc\u03b5 \u03ad\u03bd\u03b1\u03bd \u03bc\u03b5\u03b3\u03ac\u03bb\u03bf \u03b1\u03c1\u03b9\u03b8\u03bc\u03cc \u03c7\u03b1\u03c1\u03b1\u03ba\u03c4\u03ae\u03c1\u03c9\u03bd.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u03a0\u03ce\u03c2 \u03bc\u03c0\u03bf\u03c1\u03ce \u03bd\u03b1 \u03c4\u03bf \u03b1\u03c0\u03bf\u03c6\u03cd\u03b3\u03c9;<\/h3>\n\n\n\n<p>\u0393\u03b9\u03b1 \u03bd\u03b1 \u03bb\u03cd\u03c3\u03b5\u03c4\u03b5 \u03b1\u03c5\u03c4\u03cc \u03c4\u03bf \u03c0\u03c1\u03cc\u03b2\u03bb\u03b7\u03bc\u03b1, \u03c7\u03c1\u03b7\u03c3\u03b9\u03bc\u03bf\u03c0\u03bf\u03b9\u03ae\u03c3\u03c4\u03b5 <code>StringBuilder<\/code>. \u0394\u03b7\u03bc\u03b9\u03bf\u03c5\u03c1\u03b3\u03b5\u03af \u03ad\u03bd\u03b1 \u03bc\u03b5\u03c4\u03b1\u03b2\u03bb\u03b7\u03c4\u03cc \u03b1\u03bd\u03c4\u03b9\u03ba\u03b5\u03af\u03bc\u03b5\u03bd\u03bf \u03c0\u03bf\u03c5 \u03bc\u03c0\u03bf\u03c1\u03b5\u03af \u03b5\u03cd\u03ba\u03bf\u03bb\u03b1 \u03bd\u03b1 \u03c7\u03b5\u03b9\u03c1\u03b1\u03b3\u03c9\u03b3\u03b7\u03b8\u03b5\u03af. \u03a6\u03c5\u03c3\u03b9\u03ba\u03ac, \u03bc\u03c0\u03bf\u03c1\u03b5\u03af\u03c4\u03b5 \u03c0\u03ac\u03bd\u03c4\u03b1 \u03bd\u03b1 \u03c7\u03c1\u03b7\u03c3\u03b9\u03bc\u03bf\u03c0\u03bf\u03b9\u03ae\u03c3\u03b5\u03c4\u03b5 <code>StringBuffer<\/code> \u03b1\u03bd \u03c4\u03bf <a href=\"https:\/\/thecodest.co\/el\/dictionary\/why-do-projects-fail\/\">\u03ad\u03c1\u03b3\u03bf<\/a> \u03c7\u03c1\u03b7\u03c3\u03b9\u03bc\u03bf\u03c0\u03bf\u03b9\u03b5\u03af\u03c4\u03b1\u03b9 \u03c3\u03b5 \u03c4\u03b1\u03c5\u03c4\u03cc\u03c7\u03c1\u03bf\u03bd\u03bf \u03c0\u03bb\u03b1\u03af\u03c3\u03b9\u03bf.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">6. \u039c\u03b7 \u03c7\u03c1\u03ae\u03c3\u03b7 \u03c5\u03c6\u03b9\u03c3\u03c4\u03ac\u03bc\u03b5\u03bd\u03c9\u03bd \u03bb\u03cd\u03c3\u03b5\u03c9\u03bd<\/h2>\n\n\n\n<p>\u038c\u03c4\u03b1\u03bd \u03b1\u03bd\u03b1\u03c0\u03c4\u03cd\u03c3\u03c3\u03b5\u03c4\u03b5 \u03bb\u03bf\u03b3\u03b9\u03c3\u03bc\u03b9\u03ba\u03cc, \u03b7 \u03b3\u03bd\u03ce\u03c3\u03b7 \u03c4\u03c9\u03bd \u03b2\u03b1\u03c3\u03b9\u03ba\u03ce\u03bd \u03c3\u03c4\u03bf\u03b9\u03c7\u03b5\u03af\u03c9\u03bd \u03c4\u03b7\u03c2 \u03b3\u03bb\u03ce\u03c3\u03c3\u03b1\u03c2 \u03c3\u03c4\u03b7\u03bd \u03bf\u03c0\u03bf\u03af\u03b1 \u03b3\u03c1\u03ac\u03c6\u03b5\u03c4\u03b5 \u03b5\u03af\u03bd\u03b1\u03b9 \u03b1\u03c0\u03b1\u03c1\u03b1\u03af\u03c4\u03b7\u03c4\u03b7, \u03b1\u03bb\u03bb\u03ac \u03b4\u03b5\u03bd \u03b1\u03c1\u03ba\u03b5\u03af. \u03a0\u03bf\u03bb\u03bb\u03ac \u03b1\u03bb\u03b3\u03bf\u03c1\u03b9\u03b8\u03bc\u03b9\u03ba\u03ac \u03c0\u03c1\u03bf\u03b2\u03bb\u03ae\u03bc\u03b1\u03c4\u03b1 \u03c0\u03bf\u03c5 \u03c3\u03c5\u03bd\u03b1\u03bd\u03c4\u03ac\u03c4\u03b5 \u03ba\u03b1\u03c4\u03ac \u03c4\u03b7\u03bd \u03c5\u03bb\u03bf\u03c0\u03bf\u03af\u03b7\u03c3\u03b7 \u03bc\u03b9\u03b1\u03c2 \u03bd\u03ad\u03b1\u03c2 \u03bb\u03b5\u03b9\u03c4\u03bf\u03c5\u03c1\u03b3\u03af\u03b1\u03c2 \u03ad\u03c7\u03bf\u03c5\u03bd \u03ae\u03b4\u03b7 \u03bb\u03c5\u03b8\u03b5\u03af \u03b1\u03c0\u03cc \u03ba\u03ac\u03c0\u03bf\u03b9\u03bf\u03bd \u03ac\u03bb\u03bb\u03bf\u03bd. \u03a0\u03ac\u03c1\u03b1 \u03c0\u03bf\u03bb\u03bb\u03ad\u03c2 \u03c6\u03bf\u03c1\u03ad\u03c2 \u03ad\u03c7\u03c9 \u03b4\u03b5\u03b9 \u03ba\u03ac\u03c0\u03bf\u03b9\u03bf\u03bd \u03bd\u03b1 \u03c5\u03bb\u03bf\u03c0\u03bf\u03b9\u03b5\u03af \u03ad\u03bd\u03b1\u03bd \u03b1\u03bb\u03b3\u03cc\u03c1\u03b9\u03b8\u03bc\u03bf \u03b1\u03c3\u03c6\u03b1\u03bb\u03b5\u03af\u03b1\u03c2 \u03b1\u03c0\u03cc \u03c4\u03bf \u03bc\u03b7\u03b4\u03ad\u03bd. \u039c\u03b9\u03b1 \u03c4\u03ad\u03c4\u03bf\u03b9\u03b1 \u03c0\u03c1\u03bf\u03c3\u03ad\u03b3\u03b3\u03b9\u03c3\u03b7 \u03b5\u03af\u03bd\u03b1\u03b9 \u03b5\u03c0\u03b9\u03c1\u03c1\u03b5\u03c0\u03ae\u03c2 \u03c3\u03b5 \u03bb\u03ac\u03b8\u03b7. \u0388\u03bd\u03b1 \u03ac\u03c4\u03bf\u03bc\u03bf \u03b4\u03b5\u03bd \u03bc\u03c0\u03bf\u03c1\u03b5\u03af \u03bd\u03b1 \u03b5\u03bb\u03ad\u03b3\u03be\u03b5\u03b9 \u03b4\u03b9\u03b5\u03be\u03bf\u03b4\u03b9\u03ba\u03ac \u03bc\u03b9\u03b1 \u03c4\u03cc\u03c3\u03bf \u03c0\u03bf\u03bb\u03cd\u03c0\u03bb\u03bf\u03ba\u03b7 \u03bb\u03cd\u03c3\u03b7. \u0397 \u03c3\u03c5\u03bb\u03bb\u03bf\u03b3\u03b9\u03ba\u03ae \u03b3\u03bd\u03ce\u03c3\u03b7 \u03c4\u03bf\u03c5 <a href=\"https:\/\/thecodest.co\/el\/dictionary\/how-to-lead-software-development-team\/\">\u03bf\u03bc\u03ac\u03b4\u03b1<\/a> \u03c0\u03bf\u03c5 \u03b1\u03c0\u03bf\u03c4\u03b5\u03bb\u03b5\u03af\u03c4\u03b1\u03b9 \u03b1\u03c0\u03cc \u03bc\u03ad\u03c4\u03c1\u03b9\u03b1 \u03c0\u03c1\u03bf\u03c7\u03c9\u03c1\u03b7\u03bc\u03ad\u03bd\u03bf\u03c5\u03c2 \u03c0\u03c1\u03bf\u03b3\u03c1\u03b1\u03bc\u03bc\u03b1\u03c4\u03b9\u03c3\u03c4\u03ad\u03c2 \u03b5\u03af\u03bd\u03b1\u03b9 \u03c3\u03c7\u03b5\u03b4\u03cc\u03bd \u03c0\u03ac\u03bd\u03c4\u03b1 \u03ba\u03b1\u03bb\u03cd\u03c4\u03b5\u03c1\u03b7 \u03b1\u03c0\u03cc \u03c4\u03bf \u03bc\u03b5\u03b3\u03b1\u03bb\u03b5\u03af\u03bf \u03b5\u03bd\u03cc\u03c2 \u03b8\u03b1\u03cd\u03bc\u03b1\u03c4\u03bf\u03c2 <strong><a href=\"https:\/\/thecodest.co\/el\/dictionary\/java-developer\/\">\u03a0\u03c1\u03bf\u03b3\u03c1\u03b1\u03bc\u03bc\u03b1\u03c4\u03b9\u03c3\u03c4\u03ae\u03c2 Java<\/a><\/strong>. \u0394\u03b5\u03bd \u03c7\u03c1\u03b5\u03b9\u03ac\u03b6\u03b5\u03c4\u03b1\u03b9 \u03bd\u03b1 \u03b1\u03bd\u03b1\u03ba\u03b1\u03bb\u03cd\u03c8\u03b5\u03c4\u03b5 \u03b5\u03ba \u03bd\u03ad\u03bf\u03c5 \u03c4\u03bf\u03bd \u03c4\u03c1\u03bf\u03c7\u03cc - \u03b1\u03c1\u03ba\u03b5\u03af \u03bd\u03b1 \u03c0\u03c1\u03bf\u03c3\u03b1\u03c1\u03bc\u03cc\u03c3\u03b5\u03c4\u03b5 \u03c4\u03b7\u03bd \u03c5\u03c0\u03ac\u03c1\u03c7\u03bf\u03c5\u03c3\u03b1 \u03bb\u03cd\u03c3\u03b7 \u03c3\u03c4\u03b9\u03c2 \u03b1\u03bd\u03ac\u03b3\u03ba\u03b5\u03c2 \u03c3\u03b1\u03c2.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u03a0\u03ce\u03c2 \u03bc\u03c0\u03bf\u03c1\u03ce \u03bd\u03b1 \u03c4\u03bf \u03b1\u03c0\u03bf\u03c6\u03cd\u03b3\u03c9;<\/h3>\n\n\n\n<p>\u03a0\u03c1\u03bf\u03c3\u03c0\u03b1\u03b8\u03ae\u03c3\u03c4\u03b5 \u03bd\u03b1 \u03b1\u03bd\u03b1\u03b6\u03b7\u03c4\u03ae\u03c3\u03b5\u03c4\u03b5 \u03b2\u03b9\u03b2\u03bb\u03b9\u03bf\u03b8\u03ae\u03ba\u03b5\u03c2 \u03c0\u03bf\u03c5 \u03b1\u03bd\u03c4\u03b9\u03bc\u03b5\u03c4\u03c9\u03c0\u03af\u03b6\u03bf\u03c5\u03bd \u03c4\u03bf \u03c0\u03c1\u03cc\u03b2\u03bb\u03b7\u03bc\u03b1 \u03c0\u03ac\u03bd\u03c9 \u03c3\u03c4\u03bf \u03bf\u03c0\u03bf\u03af\u03bf \u03b5\u03c1\u03b3\u03ac\u03b6\u03b5\u03c3\u03c4\u03b5. \u03a0\u03c1\u03bf\u03c3\u03c0\u03b1\u03b8\u03ae\u03c3\u03c4\u03b5 \u03bd\u03b1 \u03b2\u03c1\u03b5\u03af\u03c4\u03b5 \u03c0\u03b1\u03c1\u03cc\u03bc\u03bf\u03b9\u03b5\u03c2 \u03bb\u03cd\u03c3\u03b5\u03b9\u03c2. \u03a0\u03bf\u03bb\u03bb\u03ad\u03c2 \u03b1\u03c0\u03cc \u03c4\u03b9\u03c2 \u03b2\u03b9\u03b2\u03bb\u03b9\u03bf\u03b8\u03ae\u03ba\u03b5\u03c2 \u03c0\u03bf\u03c5 \u03b5\u03af\u03bd\u03b1\u03b9 \u03b4\u03b9\u03b1\u03b8\u03ad\u03c3\u03b9\u03bc\u03b5\u03c2 \u03c3\u03c4\u03bf <a href=\"https:\/\/thecodest.co\/el\/blog\/find-your-ideal-stack-for-web-development\/\">web<\/a> \u03b5\u03af\u03bd\u03b1\u03b9 \u03b4\u03c9\u03c1\u03b5\u03ac\u03bd \u03ba\u03b1\u03b9 \u03ad\u03c7\u03bf\u03c5\u03bd \u03b2\u03b5\u03bb\u03c4\u03b9\u03c9\u03b8\u03b5\u03af \u03ba\u03b1\u03b9 \u03b4\u03bf\u03ba\u03b9\u03bc\u03b1\u03c3\u03c4\u03b5\u03af \u03b1\u03c0\u03cc \u03ad\u03bc\u03c0\u03b5\u03b9\u03c1\u03bf\u03c5\u03c2 \u03c0\u03c1\u03bf\u03b3\u03c1\u03b1\u03bc\u03bc\u03b1\u03c4\u03b9\u03c3\u03c4\u03ad\u03c2 \u03ba\u03b1\u03b9 \u03bf\u03bb\u03cc\u03ba\u03bb\u03b7\u03c1\u03b7 \u03c4\u03b7\u03bd \u03ba\u03bf\u03b9\u03bd\u03cc\u03c4\u03b7\u03c4\u03b1 \u03c4\u03b7\u03c2 Java. \u039c\u03b7 \u03c6\u03bf\u03b2\u03ac\u03c3\u03c4\u03b5 \u03bd\u03b1 \u03c4\u03b1 \u03c7\u03c1\u03b7\u03c3\u03b9\u03bc\u03bf\u03c0\u03bf\u03b9\u03ae\u03c3\u03b5\u03c4\u03b5.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">7. \u039c\u03b7 \u03b5\u03cd\u03c1\u03b5\u03c3\u03b7 \u03b1\u03c1\u03ba\u03b5\u03c4\u03bf\u03cd \u03c7\u03c1\u03cc\u03bd\u03bf\u03c5 \u03b3\u03b9\u03b1 \u03c4\u03b7 \u03c3\u03c5\u03b3\u03b3\u03c1\u03b1\u03c6\u03ae \u03b4\u03bf\u03ba\u03b9\u03bc\u03ce\u03bd<\/h2>\n\n\n\n<p>\u0395\u03af\u03bd\u03b1\u03b9 \u03b4\u03b5\u03bb\u03b5\u03b1\u03c3\u03c4\u03b9\u03ba\u03cc \u03bd\u03b1 \u03c0\u03b9\u03c3\u03c4\u03b5\u03cd\u03bf\u03c5\u03bc\u03b5 \u03cc\u03c4\u03b9 \u03bf \u03ba\u03ce\u03b4\u03b9\u03ba\u03ac\u03c2 \u03bc\u03b1\u03c2 \u03b8\u03b1 \u03b5\u03ba\u03c4\u03b5\u03bb\u03b5\u03af\u03c4\u03b1\u03b9 \u03c0\u03ac\u03bd\u03c4\u03b1 \u03c4\u03ad\u03bb\u03b5\u03b9\u03b1. \u03a4\u03bf \u03bd\u03b1 \u03bc\u03b7 \u03b3\u03c1\u03ac\u03c6\u03bf\u03c5\u03bc\u03b5 \u03b4\u03bf\u03ba\u03b9\u03bc\u03ad\u03c2 \u03b3\u03b9\u03b1 \u03c4\u03bf\u03bd \u03ba\u03ce\u03b4\u03b9\u03ba\u03b1 \u03b5\u03af\u03bd\u03b1\u03b9 \u03b7 \u03c7\u03b5\u03b9\u03c1\u03cc\u03c4\u03b5\u03c1\u03b7 \u03b1\u03bc\u03b1\u03c1\u03c4\u03af\u03b1 \u03c4\u03bf\u03c5 <strong>Java <a href=\"https:\/\/thecodest.co\/el\/blog\/hire-software-developers\/\">\u03c0\u03c1\u03bf\u03b3\u03c1\u03b1\u03bc\u03bc\u03b1\u03c4\u03b9\u03c3\u03c4\u03ad\u03c2 \u03bb\u03bf\u03b3\u03b9\u03c3\u03bc\u03b9\u03ba\u03bf\u03cd<\/a><\/strong>. \u03a0\u03bf\u03bb\u03bb\u03ac \u03b1\u03c0\u03cc \u03c4\u03b1 <a href=\"https:\/\/thecodest.co\/el\/blog\/why-us-companies-are-opting-for-polish-developers\/\">us<\/a> \u03c0\u03c1\u03bf\u03c4\u03b9\u03bc\u03bf\u03cd\u03bd \u03c7\u03b5\u03b9\u03c1\u03bf\u03ba\u03af\u03bd\u03b7\u03c4\u03b5\u03c2 \u03ba\u03b1\u03b9 \u03b4\u03b9\u03b5\u03c1\u03b5\u03c5\u03bd\u03b7\u03c4\u03b9\u03ba\u03ad\u03c2 \u03b4\u03bf\u03ba\u03b9\u03bc\u03ad\u03c2 \u03b1\u03bd\u03c4\u03af \u03b3\u03b9\u03b1 \u03b4\u03bf\u03ba\u03b9\u03bc\u03ad\u03c2 \u03bc\u03bf\u03bd\u03ac\u03b4\u03b1\u03c2, \u03c0\u03c1\u03ac\u03b3\u03bc\u03b1 \u03c0\u03bf\u03c5 \u03b5\u03af\u03bd\u03b1\u03b9 \u03c4\u03c1\u03b5\u03bb\u03cc.  \u0393\u03b9\u03b1\u03c4\u03af \u03bd\u03b1 \u03c7\u03ac\u03bd\u03b5\u03c4\u03b5 \u03c7\u03c1\u03cc\u03bd\u03bf \u03b3\u03c1\u03ac\u03c6\u03bf\u03bd\u03c4\u03b1\u03c2 \u03b4\u03bf\u03ba\u03b9\u03bc\u03ad\u03c2 \u03cc\u03c4\u03b1\u03bd \u03bc\u03c0\u03bf\u03c1\u03b5\u03af\u03c4\u03b5 \u03bd\u03b1 \u03b5\u03c0\u03b9\u03ba\u03b5\u03bd\u03c4\u03c1\u03c9\u03b8\u03b5\u03af\u03c4\u03b5 \u03c3\u03c4\u03bf \u03bd\u03b1 \u03c0\u03b1\u03c1\u03ad\u03c7\u03b5\u03c4\u03b5 \u03c4\u03bf\u03bd \u03ba\u03b1\u03bb\u03cd\u03c4\u03b5\u03c1\u03bf \u03ba\u03ce\u03b4\u03b9\u03ba\u03b1 \u03c3\u03c4\u03bf\u03bd \u03ba\u03cc\u03c3\u03bc\u03bf \u03b3\u03b9\u03b1 \u03c4\u03bf \u03ad\u03c1\u03b3\u03bf \u03c3\u03b1\u03c2, \u03c0\u03bf\u03c5 \u03a3\u0399\u0393\u039f\u03a5\u03a1\u0391 \u03b4\u03b5\u03bd \u03ad\u03c7\u03b5\u03b9 \u03c3\u03c6\u03ac\u03bb\u03bc\u03b1\u03c4\u03b1; &amp;ltjoke&gt;. \u0391\u03c0\u03bf\u03b4\u03b5\u03b9\u03ba\u03bd\u03cd\u03b5\u03c4\u03b1\u03b9 \u03cc\u03c4\u03b9 \u03b7 \u03c0\u03c1\u03b1\u03b3\u03bc\u03b1\u03c4\u03b9\u03ba\u03cc\u03c4\u03b7\u03c4\u03b1 \u03b5\u03af\u03bd\u03b1\u03b9 \u03b2\u03ac\u03bd\u03b1\u03c5\u03c3\u03b7 \u03ba\u03b1\u03b9 \u03b4\u03b5\u03bd \u03bc\u03c0\u03bf\u03c1\u03bf\u03cd\u03bc\u03b5 \u03bd\u03b1 \u03c0\u03b1\u03c1\u03ad\u03c7\u03bf\u03c5\u03bc\u03b5 \u03ba\u03ce\u03b4\u03b9\u03ba\u03b1 \u03c5\u03c8\u03b7\u03bb\u03ae\u03c2 \u03c0\u03bf\u03b9\u03cc\u03c4\u03b7\u03c4\u03b1\u03c2 \u03c7\u03c9\u03c1\u03af\u03c2 \u03bd\u03b1 \u03b3\u03c1\u03ac\u03c6\u03bf\u03c5\u03bc\u03b5 \u03b4\u03bf\u03ba\u03b9\u03bc\u03ad\u03c2.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u03a0\u03ce\u03c2 \u03bc\u03c0\u03bf\u03c1\u03ce \u03bd\u03b1 \u03c4\u03bf \u03b1\u03c0\u03bf\u03c6\u03cd\u03b3\u03c9;<\/h3>\n\n\n\n<p>\u0398\u03b1 \u03c0\u03c1\u03ad\u03c0\u03b5\u03b9 \u03c0\u03ac\u03bd\u03c4\u03b1 \u03bd\u03b1 \u03c0\u03c1\u03bf\u03b5\u03c4\u03bf\u03b9\u03bc\u03ac\u03b6\u03b5\u03c4\u03b5 \u03b4\u03bf\u03ba\u03b9\u03bc\u03ad\u03c2 \u03b3\u03b9\u03b1 \u03c4\u03bf\u03bd \u03ba\u03ce\u03b4\u03b9\u03ba\u03ac \u03c3\u03b1\u03c2. \u039e\u03ad\u03c1\u03c9 \u03cc\u03c4\u03b9 \u03b7 \u03c0\u03c1\u03bf\u03c3\u03ad\u03b3\u03b3\u03b9\u03c3\u03b7 TDD \u03b4\u03b5\u03bd \u03b5\u03af\u03bd\u03b1\u03b9 \u03c4\u03cc\u03c3\u03bf \u03b5\u03cd\u03ba\u03bf\u03bb\u03bf \u03bd\u03b1 \u03b4\u03b9\u03b1\u03c4\u03b7\u03c1\u03b7\u03b8\u03b5\u03af, \u03b1\u03bb\u03bb\u03ac \u03b8\u03b1 \u03c0\u03c1\u03ad\u03c0\u03b5\u03b9 \u03c4\u03bf\u03c5\u03bb\u03ac\u03c7\u03b9\u03c3\u03c4\u03bf\u03bd \u03bd\u03b1 \u03c0\u03b1\u03c1\u03ad\u03c7\u03b5\u03c4\u03b5 \u03b4\u03bf\u03ba\u03b9\u03bc\u03ad\u03c2 \u03c0\u03bf\u03c5 \u03ba\u03b1\u03bb\u03cd\u03c0\u03c4\u03bf\u03c5\u03bd \u03cc\u03bb\u03b5\u03c2 \u03c4\u03b9\u03c2 \u03c3\u03c5\u03bd\u03b8\u03ae\u03ba\u03b5\u03c2 \u03c5\u03c0\u03cc \u03c4\u03b9\u03c2 \u03bf\u03c0\u03bf\u03af\u03b5\u03c2 \u03bc\u03c0\u03bf\u03c1\u03b5\u03af \u03bd\u03b1 \u03b5\u03ba\u03c4\u03b5\u03bb\u03b5\u03c3\u03c4\u03b5\u03af \u03bf \u03ba\u03ce\u03b4\u03b9\u03ba\u03ac\u03c2 \u03c3\u03b1\u03c2. \u0391\u03c5\u03c4\u03cc \u03c0\u03b5\u03c1\u03b9\u03bb\u03b1\u03bc\u03b2\u03ac\u03bd\u03b5\u03b9 \u03c4\u03bf\u03bd \u03ad\u03bb\u03b5\u03b3\u03c7\u03bf \u03b5\u03be\u03b1\u03b9\u03c1\u03b5\u03c4\u03b9\u03ba\u03ce\u03bd \u03ba\u03b1\u03c4\u03b1\u03c3\u03c4\u03ac\u03c3\u03b5\u03c9\u03bd. \u039f\u03b9 \u03b4\u03bf\u03ba\u03b9\u03bc\u03ad\u03c2 \u03bc\u03bf\u03bd\u03ac\u03b4\u03b1\u03c2 \u03b5\u03af\u03bd\u03b1\u03b9 \u03b1\u03c0\u03b1\u03c1\u03b1\u03af\u03c4\u03b7\u03c4\u03b5\u03c2. \u03a0\u03c1\u03ad\u03c0\u03b5\u03b9 \u03bd\u03b1 \u03c4\u03b9\u03c2 \u03c0\u03b1\u03c1\u03ad\u03c7\u03b5\u03c4\u03b5 \u03b3\u03b9\u03b1 \u03ba\u03ac\u03b8\u03b5 \u03c7\u03b1\u03c1\u03b1\u03ba\u03c4\u03b7\u03c1\u03b9\u03c3\u03c4\u03b9\u03ba\u03cc \u03c4\u03bf\u03c5 \u03ad\u03c1\u03b3\u03bf\u03c5 \u03c3\u03b1\u03c2, \u03b1\u03bd \u03b8\u03ad\u03bb\u03b5\u03c4\u03b5 \u03bd\u03b1 \u03b2\u03b5\u03b2\u03b1\u03b9\u03c9\u03b8\u03b5\u03af\u03c4\u03b5 \u03cc\u03c4\u03b9 \u03bf \u03ba\u03ce\u03b4\u03b9\u03ba\u03ac\u03c2 \u03c3\u03b1\u03c2 \u03b5\u03af\u03bd\u03b1\u03b9 \u03b5\u03cd\u03ba\u03bf\u03bb\u03bf \u03bd\u03b1 \u03b1\u03bd\u03b1\u03b4\u03b9\u03b1\u03bc\u03bf\u03c1\u03c6\u03c9\u03b8\u03b5\u03af \u03ba\u03b1\u03b9 \u03bd\u03b1 \u03b5\u03c0\u03b5\u03ba\u03c4\u03b1\u03b8\u03b5\u03af \u03c3\u03b5 \u03c0\u03b5\u03c1\u03b1\u03b9\u03c4\u03ad\u03c1\u03c9 \u03b1\u03bd\u03ac\u03c0\u03c4\u03c5\u03be\u03b7.&nbsp;<\/p>\n\n\n\n<p>\u039a\u03b1\u03b9 \u03ba\u03ac\u03c4\u03b9 \u03b1\u03ba\u03cc\u03bc\u03b1. \u0394\u03b9\u03b1\u03c4\u03b7\u03c1\u03ae\u03c3\u03c4\u03b5 \u03ad\u03bd\u03b1 \u03c5\u03c8\u03b7\u03bb\u03cc \u03b5\u03c0\u03af\u03c0\u03b5\u03b4\u03bf \u03c4\u03bf\u03c5 \u03ba\u03ce\u03b4\u03b9\u03ba\u03b1 \u03b4\u03bf\u03ba\u03b9\u03bc\u03ce\u03bd \u03c3\u03b1\u03c2 - \u03b8\u03b1 \u03b1\u03be\u03af\u03b6\u03b5\u03b9 \u03c4\u03bf\u03bd \u03ba\u03cc\u03c0\u03bf. \u0391\u03c5\u03c4\u03ae \u03b5\u03af\u03bd\u03b1\u03b9 \u03b7 \u03c3\u03c5\u03bc\u03b2\u03bf\u03c5\u03bb\u03ae \u03c4\u03bf\u03c5 \u03b8\u03b5\u03af\u03bf\u03c5 Bob \u03ba\u03b1\u03b9 \u03c3\u03c5\u03bc\u03c6\u03c9\u03bd\u03ce \u03b1\u03c0\u03cc\u03bb\u03c5\u03c4\u03b1 \u03bc\u03b1\u03b6\u03af \u03c4\u03b7\u03c2.<\/p>\n\n\n\n<p>\u0395\u03c0\u03b9\u03c0\u03bb\u03ad\u03bf\u03bd, \u03bc\u03b7\u03bd \u03be\u03b5\u03c7\u03bd\u03ac\u03c4\u03b5 \u03ac\u03bb\u03bb\u03bf\u03c5\u03c2 \u03c4\u03cd\u03c0\u03bf\u03c5\u03c2 \u03b4\u03bf\u03ba\u03b9\u03bc\u03ce\u03bd. \u039f\u03b9 \u03b4\u03bf\u03ba\u03b9\u03bc\u03ad\u03c2 \u03b5\u03bd\u03c3\u03c9\u03bc\u03ac\u03c4\u03c9\u03c3\u03b7\u03c2 \u03b5\u03af\u03bd\u03b1\u03b9 \u03ba\u03ac\u03c4\u03b9 \u03c0\u03bf\u03c5 \u03c0\u03c1\u03ad\u03c0\u03b5\u03b9 \u03bd\u03b1 \u03bb\u03b1\u03bc\u03b2\u03ac\u03bd\u03b5\u03c4\u03b5 \u03c5\u03c0\u03cc\u03c8\u03b7 \u03c3\u03b5 \u03ba\u03ac\u03b8\u03b5 \u03ad\u03c1\u03b3\u03bf \u03c3\u03b1\u03c2.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">8. \u039e\u03b5\u03c7\u03bd\u03ce\u03bd\u03c4\u03b1\u03c2 \u03c4\u03bf\u03c5\u03c2 \u03c4\u03c1\u03bf\u03c0\u03bf\u03c0\u03bf\u03b9\u03b7\u03c4\u03ad\u03c2 \u03c0\u03c1\u03cc\u03c3\u03b2\u03b1\u03c3\u03b7\u03c2<\/h2>\n\n\n\n<p>\u0399\u03b4\u03b9\u03c9\u03c4\u03b9\u03ba\u03cc \u03ba\u03b1\u03b9 \u03b4\u03b7\u03bc\u03cc\u03c3\u03b9\u03bf, \u03c3\u03c9\u03c3\u03c4\u03ac; \u03a0\u03ce\u03c2 \u03bc\u03c0\u03bf\u03c1\u03bf\u03cd\u03bc\u03b5 \u03bd\u03b1 \u03c4\u03b1 \u03be\u03b5\u03c7\u03ac\u03c3\u03bf\u03c5\u03bc\u03b5. \u0391\u03c0\u03bf\u03b4\u03b5\u03b9\u03ba\u03bd\u03cd\u03b5\u03c4\u03b1\u03b9 \u03cc\u03c4\u03b9 \u03c5\u03c0\u03ac\u03c1\u03c7\u03bf\u03c5\u03bd \u03ba\u03b9 \u03ac\u03bb\u03bb\u03b1. \u038c\u03c4\u03b1\u03bd \u03b1\u03c1\u03c7\u03af\u03c3\u03b1\u03c4\u03b5 \u03bd\u03b1 \u03bc\u03b1\u03b8\u03b1\u03af\u03bd\u03b5\u03c4\u03b5 <strong>Java<\/strong>, \u03c3\u03af\u03b3\u03bf\u03c5\u03c1\u03b1 \u03bc\u03ac\u03b8\u03b1\u03c4\u03b5 \u03b3\u03b9\u03b1 \u03c4\u03bf\u03c5\u03c2 \u03c4\u03c1\u03bf\u03c0\u03bf\u03c0\u03bf\u03b9\u03b7\u03c4\u03ad\u03c2 \u03c0\u03c1\u03bf\u03c3\u03c4\u03b1\u03c4\u03b5\u03c5\u03cc\u03bc\u03b5\u03bd\u03b7\u03c2 \u03c0\u03c1\u03cc\u03c3\u03b2\u03b1\u03c3\u03b7\u03c2. \u039c\u03c0\u03bf\u03c1\u03bf\u03cd\u03bd \u03bd\u03b1 \u03b5\u03af\u03bd\u03b1\u03b9 \u03c7\u03c1\u03ae\u03c3\u03b9\u03bc\u03bf\u03b9 \u03c3\u03b5 \u03bf\u03c1\u03b9\u03c3\u03bc\u03ad\u03bd\u03b5\u03c2 \u03c0\u03b5\u03c1\u03b9\u03c0\u03c4\u03ce\u03c3\u03b5\u03b9\u03c2, \u03bf\u03c0\u03cc\u03c4\u03b5 \u03b1\u03be\u03af\u03b6\u03b5\u03b9 \u03bd\u03b1 \u03b3\u03bd\u03c9\u03c1\u03af\u03b6\u03b5\u03c4\u03b5 \u03c4\u03b7\u03bd \u03cd\u03c0\u03b1\u03c1\u03be\u03ae \u03c4\u03bf\u03c5\u03c2.<\/p>\n\n\n\n<p><strong><a href=\"https:\/\/thecodest.co\/el\/blog\/the-right-way-to-find-top-java-developers\/\">\u03a0\u03c1\u03bf\u03b3\u03c1\u03b1\u03bc\u03bc\u03b1\u03c4\u03b9\u03c3\u03c4\u03ad\u03c2 Java<\/a><\/strong> \u03c3\u03c5\u03c7\u03bd\u03ac \u03c6\u03b1\u03af\u03bd\u03b5\u03c4\u03b1\u03b9 \u03bd\u03b1 \u03be\u03b5\u03c7\u03bd\u03bf\u03cd\u03bd \u03c4\u03bf \u03c0\u03b5\u03b4\u03af\u03bf \u03b5\u03c6\u03b1\u03c1\u03bc\u03bf\u03b3\u03ae\u03c2 \u03c4\u03bf\u03c5 \u03c0\u03b1\u03ba\u03ad\u03c4\u03bf\u03c5. \u0395\u03af\u03bd\u03b1\u03b9 \u03b5\u03cd\u03ba\u03bf\u03bb\u03bf \u03bd\u03b1 \u03bc\u03b7\u03bd \u03b8\u03c5\u03bc\u03cc\u03bc\u03b1\u03c3\u03c4\u03b5 \u03c4\u03b7 \u03c7\u03c1\u03ae\u03c3\u03b7 \u03c4\u03bf\u03c5, \u03b1\u03c6\u03bf\u03cd \u03b5\u03af\u03bd\u03b1\u03b9 \u03c3\u03b9\u03c9\u03c0\u03b7\u03c1\u03cc \u03ba\u03b1\u03b9 \u03b4\u03b5\u03bd \u03b1\u03c0\u03b1\u03b9\u03c4\u03b5\u03af \u03ba\u03b1\u03bd\u03ad\u03bd\u03b1 <strong>Java<\/strong> \u03bb\u03ad\u03be\u03b5\u03b9\u03c2-\u03ba\u03bb\u03b5\u03b9\u03b4\u03b9\u03ac. \u03a4\u03bf \u03c0\u03b5\u03b4\u03af\u03bf \u03b5\u03c6\u03b1\u03c1\u03bc\u03bf\u03b3\u03ae\u03c2 \u03c4\u03bf\u03c5 \u03c0\u03b1\u03ba\u03ad\u03c4\u03bf\u03c5 \u03b5\u03af\u03bd\u03b1\u03b9 \u03c3\u03b7\u03bc\u03b1\u03bd\u03c4\u03b9\u03ba\u03cc. \u03a3\u03b1\u03c2 \u03b5\u03c0\u03b9\u03c4\u03c1\u03ad\u03c0\u03b5\u03b9 \u03bd\u03b1 \u03b4\u03bf\u03ba\u03b9\u03bc\u03ac\u03c3\u03b5\u03c4\u03b5 \u03bc\u03b9\u03b1 \u03c0\u03c1\u03bf\u03c3\u03c4\u03b1\u03c4\u03b5\u03c5\u03bc\u03ad\u03bd\u03b7 \u03bc\u03ad\u03b8\u03bf\u03b4\u03bf. \u03a4\u03b1 \u03c0\u03c1\u03bf\u03c3\u03c4\u03b1\u03c4\u03b5\u03c5\u03bc\u03ad\u03bd\u03b1 \u03c3\u03c4\u03bf\u03b9\u03c7\u03b5\u03af\u03b1 \u03b5\u03af\u03bd\u03b1\u03b9 \u03c0\u03c1\u03bf\u03c3\u03b2\u03ac\u03c3\u03b9\u03bc\u03b1 \u03b1\u03c0\u03cc \u03c4\u03b7 \u03b4\u03b9\u03b1\u03b4\u03c1\u03bf\u03bc\u03ae \u03c4\u03b7\u03c2 \u03ba\u03bb\u03ac\u03c3\u03b7\u03c2 \u03b4\u03bf\u03ba\u03b9\u03bc\u03ae\u03c2, \u03b5\u03c6\u03cc\u03c3\u03bf\u03bd \u03c4\u03bf \u03c0\u03b1\u03ba\u03ad\u03c4\u03bf \u03b5\u03af\u03bd\u03b1\u03b9 \u03c4\u03bf \u03af\u03b4\u03b9\u03bf.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u03a0\u03ce\u03c2 \u03bc\u03c0\u03bf\u03c1\u03ce \u03bd\u03b1 \u03c4\u03bf \u03b1\u03c0\u03bf\u03c6\u03cd\u03b3\u03c9;<\/h3>\n\n\n\n<p>\u0398\u03c5\u03bc\u03b7\u03b8\u03b5\u03af\u03c4\u03b5 \u03c4\u03bf\u03bd \u03c4\u03c1\u03bf\u03c0\u03bf\u03c0\u03bf\u03b9\u03b7\u03c4\u03ae protected \u03ba\u03b1\u03b9 \u03cc\u03c4\u03b9 \u03b7 \u03b5\u03bc\u03b2\u03ad\u03bb\u03b5\u03b9\u03b1 \u03c4\u03bf\u03c5 \u03c0\u03b1\u03ba\u03ad\u03c4\u03bf\u03c5 \u03c3\u03b1\u03c2 \u03b5\u03c0\u03b9\u03c4\u03c1\u03ad\u03c0\u03b5\u03b9 \u03bd\u03b1 \u03c4\u03bf\u03bd \u03b5\u03bb\u03ad\u03b3\u03be\u03b5\u03c4\u03b5.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">9. \u03a7\u03c1\u03ae\u03c3\u03b7 \u03ba\u03b1\u03b8\u03b1\u03c1\u03ae\u03c2 JavaEE \u03b1\u03bd\u03c4\u03af \u03c4\u03b7\u03c2 Spring<\/h2>\n\n\n\n<p>\u03a4\u03bf \u03b5\u03c0\u03cc\u03bc\u03b5\u03bd\u03bf \u03b2\u03ae\u03bc\u03b1 \u03bc\u03b5\u03c4\u03ac \u03c4\u03b7\u03bd \u03b5\u03ba\u03bc\u03ac\u03b8\u03b7\u03c3\u03b7 <strong>Java<\/strong> SE \u03b5\u03af\u03bd\u03b1\u03b9 \u03bd\u03b1 \u03bc\u03ac\u03b8\u03b5\u03b9 \u03c0\u03ce\u03c2 \u03bd\u03b1 \u03c4\u03c1\u03ad\u03c7\u03b5\u03b9 <strong>Java<\/strong> \u03c3\u03b5 \u03b4\u03b9\u03b1\u03ba\u03bf\u03bc\u03b9\u03c3\u03c4\u03ad\u03c2, \u03c0\u03ce\u03c2 \u03bd\u03b1 \u03b4\u03b7\u03bc\u03b9\u03bf\u03c5\u03c1\u03b3\u03ae\u03c3\u03b5\u03c4\u03b5 \u03bc\u03b9\u03b1 \u03b5\u03c6\u03b1\u03c1\u03bc\u03bf\u03b3\u03ae \u03b5\u03c0\u03b9\u03c7\u03b5\u03b9\u03c1\u03b7\u03bc\u03b1\u03c4\u03b9\u03ba\u03bf\u03cd \u03b5\u03c0\u03b9\u03c0\u03ad\u03b4\u03bf\u03c5.<\/p>\n\n\n\n<p>\u039f\u03b9 \u03b1\u03c1\u03c7\u03ac\u03c1\u03b9\u03bf\u03b9 \u03c0\u03ad\u03c6\u03c4\u03bf\u03c5\u03bd \u03c3\u03c5\u03c7\u03bd\u03ac \u03c3\u03c4\u03b7\u03bd \u03c0\u03b1\u03b3\u03af\u03b4\u03b1 \u03c4\u03b7\u03c2 \u03b5\u03ba\u03bc\u03ac\u03b8\u03b7\u03c3\u03b7\u03c2 \u03c4\u03b7\u03c2 JavaEE, \u03b4\u03b5\u03b4\u03bf\u03bc\u03ad\u03bd\u03bf\u03c5 \u03cc\u03c4\u03b9 \u03c5\u03c0\u03ac\u03c1\u03c7\u03b5\u03b9 \u03ad\u03bd\u03b1\u03c2 \u03c4\u03b5\u03c1\u03ac\u03c3\u03c4\u03b9\u03bf\u03c2 \u03b1\u03c1\u03b9\u03b8\u03bc\u03cc\u03c2 \u03c3\u03b5\u03bc\u03b9\u03bd\u03b1\u03c1\u03af\u03c9\u03bd \u03c3\u03c7\u03b5\u03c4\u03b9\u03ba\u03ac \u03bc\u03b5 \u03b1\u03c5\u03c4\u03ae\u03bd. \u0391\u03ba\u03cc\u03bc\u03b1 \u03ba\u03b1\u03b9 \u03c4\u03bf 'Thinking in Java', \u03c4\u03bf <strong>\u03a0\u03c1\u03bf\u03b3\u03c1\u03b1\u03bc\u03bc\u03b1\u03c4\u03b9\u03c3\u03c4\u03ad\u03c2 Java<\/strong>', \u03b1\u03bd\u03b1\u03c6\u03ad\u03c1\u03b5\u03b9 \u03c4\u03b7\u03bd JavaEE \u03ba\u03b1\u03b9 \u03b4\u03b5\u03bd \u03bb\u03ad\u03b5\u03b9 \u03c4\u03af\u03c0\u03bf\u03c4\u03b1 \u03b3\u03b9\u03b1 \u03c4\u03b9\u03c2 \u03ac\u03bb\u03bb\u03b5\u03c2 \u03b5\u03c0\u03b9\u03bb\u03bf\u03b3\u03ad\u03c2.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u03a0\u03ce\u03c2 \u03bc\u03c0\u03bf\u03c1\u03ce \u03bd\u03b1 \u03c4\u03bf \u03b1\u03c0\u03bf\u03c6\u03cd\u03b3\u03c9;<\/h3>\n\n\n\n<p>\u0397 JavaEE \u03b5\u03af\u03bd\u03b1\u03b9 \u03ad\u03bd\u03b1 \u03c4\u03c1\u03b1\u03b3\u03bf\u03cd\u03b4\u03b9 \u03c4\u03bf\u03c5 \u03c0\u03b1\u03c1\u03b5\u03bb\u03b8\u03cc\u03bd\u03c4\u03bf\u03c2. \u03a3\u03c4\u03b9\u03c2 \u03bc\u03ad\u03c1\u03b5\u03c2 \u03bc\u03b1\u03c2, \u03b7 Spring \u03b5\u03af\u03bd\u03b1\u03b9 \u03c4\u03bf \u03b6\u03b7\u03c4\u03bf\u03cd\u03bc\u03b5\u03bd\u03bf \u03ba\u03b1\u03b9 \u03b7 Java EE \u03b5\u03af\u03bd\u03b1\u03b9 \u03b1\u03c0\u03bb\u03ac \u03bc\u03b9\u03b1 \u03ba\u03b1\u03bb\u03ae \u03b5\u03c0\u03b9\u03bb\u03bf\u03b3\u03ae. \u039a\u03ac\u03b8\u03b5 \u03c3\u03cd\u03b3\u03c7\u03c1\u03bf\u03bd\u03b7 \u03b5\u03c6\u03b1\u03c1\u03bc\u03bf\u03b3\u03ae \u03b5\u03c0\u03b9\u03c7\u03b5\u03b9\u03c1\u03b7\u03bc\u03b1\u03c4\u03b9\u03ba\u03bf\u03cd \u03b5\u03c0\u03b9\u03c0\u03ad\u03b4\u03bf\u03c5 \u03c7\u03c1\u03b7\u03c3\u03b9\u03bc\u03bf\u03c0\u03bf\u03b9\u03b5\u03af \u03c4\u03bf Spring, \u03bf\u03c0\u03cc\u03c4\u03b5 \u03b8\u03b1 \u03c0\u03c1\u03ad\u03c0\u03b5\u03b9 \u03bd\u03b1 \u03b5\u03be\u03b5\u03c4\u03ac\u03c3\u03b5\u03c4\u03b5 \u03ad\u03bd\u03c4\u03bf\u03bd\u03b1 \u03c4\u03bf \u03b5\u03bd\u03b4\u03b5\u03c7\u03cc\u03bc\u03b5\u03bd\u03bf \u03bd\u03b1 \u03bc\u03ac\u03b8\u03b5\u03c4\u03b5 <a href=\"https:\/\/spring.io\/guides\">\u03b5\u03b4\u03ce<\/a>.<\/p>\n\n\n\n<figure class=\"wp-block-image\"><a href=\"https:\/\/calendly.com\/the-codest-java-consulting\"><img decoding=\"async\" src=\"\/app\/uploads\/2024\/05\/meeting_java_expert.png\" alt=\"\u0393\u03bd\u03c9\u03c1\u03af\u03c3\u03c4\u03b5 \u03c4\u03bf\u03bd \u03b5\u03bc\u03c0\u03b5\u03b9\u03c1\u03bf\u03b3\u03bd\u03ce\u03bc\u03bf\u03bd\u03b1 \u03c4\u03b7\u03c2 Java\"\/><\/a><\/figure>\n\n\n\n<p><strong>\u0394\u03b9\u03b1\u03b2\u03ac\u03c3\u03c4\u03b5 \u03c0\u03b5\u03c1\u03b9\u03c3\u03c3\u03cc\u03c4\u03b5\u03c1\u03b1:<\/strong><\/p>\n\n\n\n<p><a href=\"https:\/\/thecodest.co\/blog\/the-right-way-to-find-top-java-developers\">\u039f \u03c3\u03c9\u03c3\u03c4\u03cc\u03c2 \u03c4\u03c1\u03cc\u03c0\u03bf\u03c2 \u03b3\u03b9\u03b1 \u03bd\u03b1 \u03b2\u03c1\u03b5\u03af\u03c4\u03b5 \u03ba\u03bf\u03c1\u03c5\u03c6\u03b1\u03af\u03bf\u03c5\u03c2 \u03c0\u03c1\u03bf\u03b3\u03c1\u03b1\u03bc\u03bc\u03b1\u03c4\u03b9\u03c3\u03c4\u03ad\u03c2 Java<\/a><\/p>\n\n\n\n<p><a href=\"https:\/\/thecodest.co\/blog\/the-best-type-of-projects-for-java\">\u039f \u03ba\u03b1\u03bb\u03cd\u03c4\u03b5\u03c1\u03bf\u03c2 \u03c4\u03cd\u03c0\u03bf\u03c2 \u03ad\u03c1\u03b3\u03c9\u03bd \u03b3\u03b9\u03b1 Java<\/a><\/p>\n\n\n\n<p><a href=\"https:\/\/thecodest.co\/blog\/top-programming-languages-for-fintech-companies\">\u039a\u03bf\u03c1\u03c5\u03c6\u03b1\u03af\u03b5\u03c2 \u03b3\u03bb\u03ce\u03c3\u03c3\u03b5\u03c2 \u03c0\u03c1\u03bf\u03b3\u03c1\u03b1\u03bc\u03bc\u03b1\u03c4\u03b9\u03c3\u03bc\u03bf\u03cd \u03b3\u03b9\u03b1 \u03b5\u03c4\u03b1\u03b9\u03c1\u03b5\u03af\u03b5\u03c2 Fintech<\/a><\/p>","protected":false},"excerpt":{"rendered":"<p>\u03a0\u03bf\u03b9\u03b1 \u03bb\u03ac\u03b8\u03b7 \u03c0\u03c1\u03ad\u03c0\u03b5\u03b9 \u03bd\u03b1 \u03b1\u03c0\u03bf\u03c6\u03b5\u03cd\u03b3\u03bf\u03bd\u03c4\u03b1\u03b9 \u03ba\u03b1\u03c4\u03ac \u03c4\u03bf\u03bd \u03c0\u03c1\u03bf\u03b3\u03c1\u03b1\u03bc\u03bc\u03b1\u03c4\u03b9\u03c3\u03bc\u03cc \u03c3\u03b5 Java; \u03a3\u03c4\u03bf \u03c0\u03b1\u03c1\u03b1\u03ba\u03ac\u03c4\u03c9 \u03ba\u03bf\u03bc\u03bc\u03ac\u03c4\u03b9 \u03b1\u03c0\u03b1\u03bd\u03c4\u03ac\u03bc\u03b5 \u03c3\u03b5 \u03b1\u03c5\u03c4\u03cc \u03c4\u03bf \u03b5\u03c1\u03ce\u03c4\u03b7\u03bc\u03b1.<\/p>","protected":false},"author":2,"featured_media":3005,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"inline_featured_image":false,"footnotes":""},"categories":[15,8],"tags":[],"class_list":["post-3004","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-fintech","category-software-development"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v27.3 (Yoast SEO v27.3) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>9 Mistakes to Avoid While Programming in Java - The Codest<\/title>\n<meta name=\"description\" content=\"Explore 9 Java coding mistakes developers should avoid to improve code quality, security, and performance in modern Java applications.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/thecodest.co\/el\/blog\/9-\u03bb\u03ac\u03b8\u03b7-\u03c0\u03bf\u03c5-\u03c0\u03c1\u03ad\u03c0\u03b5\u03b9-\u03bd\u03b1-\u03b1\u03c0\u03bf\u03c6\u03b5\u03cd\u03b3\u03b5\u03c4\u03b5-\u03ba\u03b1\u03c4\u03ac-\u03c4\u03bf\u03bd\/\" \/>\n<meta property=\"og:locale\" content=\"el_GR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"9 Mistakes to Avoid While Programming in Java\" \/>\n<meta property=\"og:description\" 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