{"id":6597,"date":"2026-04-13T11:50:42","date_gmt":"2026-04-13T11:50:42","guid":{"rendered":"http:\/\/the-codest.localhost\/dictionary\/immutable-object\/"},"modified":"2026-04-13T11:50:50","modified_gmt":"2026-04-13T11:50:50","slug":"nekintamas-objektas","status":"publish","type":"dictionary","link":"https:\/\/thecodest.co\/lt\/dictionary\/immutable-object\/","title":{"rendered":"Nekintamas objektas"},"content":{"rendered":"

Kas yra nekintamas objektas?<\/h1>\n

Nekintamas objektas - tai objektas, kurio negalima keisti, kai jis jau sukurtas. Kitaip tariant, jo b\u016bsenos negalima keisti po to, kai jis buvo sukurtas. Bet koks bandymas pakeisti objekto vert\u0119 rei\u0161kia, kad sukuriamas naujas objektas su atnaujinta verte, o pradinis objektas lieka nepakeistas.<\/p>\n

\u0160i s\u0105voka da\u017enai naudojama programavimo kalbos<\/a> palaikan\u010di\u0173 funkcin\u012f programavim\u0105, kurio pagrindin\u0117 savyb\u0117 - nekintamumas. Nekintami objektai naudingi tais atvejais, kai objekto b\u016bsenos negalima keisti, pavyzd\u017eiui, daugiasraut\u0117je aplinkoje, kai d\u0117l vienalaik\u0117s prieigos prie kintam\u0173 objekt\u0173 gali atsirasti lenktyni\u0173 s\u0105lyg\u0173 ir duomenys<\/a> korupcija.<\/p>\n

Nekintami objektai turi kelet\u0105 privalum\u0173, palyginti su kintamais objektais. Pirma, jie yra saug\u016bs gijoms ir gali b\u016bti saugiai dalijami tarp gij\u0173 be sinchronizacijos. Antra, juos lengviau pagr\u012fsti, nes j\u0173 b\u016bsena negali netik\u0117tai pasikeisti. Tre\u010dia, juos galima naudoti kaip raktus hash<\/a> lenteles ir rinkinius, nes j\u0173 hash reik\u0161m\u0117 yra pastovi ir laikui b\u0117gant nesikei\u010dia.<\/p>\n

Nekintam\u0173 objekt\u0173 pavyzd\u017eiai Java<\/a> apima String, Integer ir LocalDate. Suk\u016brus String objekt\u0105, jo reik\u0161m\u0117s keisti negalima. Bet koks bandymas j\u0105 pakeisti lemia naujo objekto String su atnaujinta verte suk\u016brim\u0105. Pana\u0161iai, suk\u016brus objekt\u0105 Integer, jo vert\u0117s negalima keisti.<\/p>\n

Ta\u010diau ne visais atvejais tinka nekei\u010diami objektai. Kai kuriais atvejais, pavyzd\u017eiui, kai objekto b\u016bsen\u0105 reikia da\u017enai atnaujinti, labiau tinka kintamieji objektai. Tokiais atvejais svarbu u\u017etikrinti, kad prieiga prie kintam\u0173 objekt\u0173 b\u016bt\u0173 sinchronizuojama, kad b\u016bt\u0173 i\u0161vengta lenktyniavimo s\u0105lyg\u0173 ir duomen\u0173 sugadinimo.<\/p>\n

Apibendrinant galima teigti, kad nekei\u010diamas objektas - tai objektas, kurio negalima keisti, kai jis jau sukurtas. Tai naudinga tais atvejais, kai objekto b\u016bsenos negalima keisti, pavyzd\u017eiui, daugiasraut\u0117je aplinkoje. Nekintami objektai turi kelet\u0105 privalum\u0173, palyginti su kintamais objektais, \u012fskaitant gij\u0173 saugum\u0105, paprast\u0105 pagrindim\u0105 ir tinkamum\u0105 naudoti kaip raktus hash lentel\u0117se ir rinkiniuose.<\/p>","protected":false},"excerpt":{"rendered":"

Su\u017einokite apie nekei\u010diamus programavimo objektus: objektus, kuri\u0173 negalima keisti, kai jie jau sukurti. Privalumai: gij\u0173 saugumas ir paprastas pagrindimas.<\/p>","protected":false},"template":"","meta":{"_acf_changed":false,"inline_featured_image":false,"footnotes":""},"class_list":["post-6597","dictionary","type-dictionary","status-publish","hentry"],"acf":[],"yoast_head":"\nImmutable Object - The Codest<\/title>\n<meta name=\"description\" content=\"Learn about immutable objects in programming: objects that cannot be modified once created. 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