{"id":143670,"date":"2025-09-17T11:12:01","date_gmt":"2025-09-17T09:12:01","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/vypusk-java-se-25-lts-i-openjdk-25"},"modified":"2025-09-17T11:12:01","modified_gmt":"2025-09-17T09:12:01","slug":"vypusk-java-se-25-lts-i-openjdk-25","status":"publish","type":"post","link":"https:\/\/prohoster.info\/hu\/blog\/news\/vypusk-java-se-25-lts-i-openjdk-25","title":{"rendered":"A Java SE 25 LTS \u00e9s OpenJDK 25 megjelen\u00e9se","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>Hat h\u00f3nappal a fejleszt\u00e9s ut\u00e1n az Oracle kiadta a Java SE 25 platformot (Java Platform, Standard Edition 24), amelynek referenci\u00e1ja az OpenJDK ny\u00edlt projekt. A Java SE 25 azok a kor\u00e1bbi verzi\u00f3kkal val\u00f3 visszafel\u00e9 kompatibilit\u00e1s meg\u0151rz\u00e9s\u00e9vel \u00e9rkezett, kiv\u00e9ve n\u00e9h\u00e1ny elavult funkci\u00f3 elt\u00e1vol\u00edt\u00e1s\u00e1t, \u00edgy a kor\u00e1bban k\u00e9sz\u00fclt Java projektek t\u00f6bbs\u00e9ge v\u00e1ltoztat\u00e1sok n\u00e9lk\u00fcl m\u0171k\u00f6dik az \u00faj verzi\u00f3 alatt. A telep\u00edt\u00e9sre k\u00e9sz Java SE 25 (JDK, JRE \u00e9s Server JRE) v\u00e1ltozatok elk\u00e9sz\u00fcltek Linux (x86_64, AArch64), Windows (x86_64) \u00e9s macOS (x86_64, AArch64) rendszerekre. Az OpenJDK keretein bel\u00fcl k\u00e9sz\u00fclt referenciamegval\u00f3s\u00edt\u00e1s teljesen ny\u00edlt, GPLv2 licenc alatt, a GNU ClassPath kiv\u00e9telekkel, amelyek megengedik a kereskedelmi term\u00e9kekkel val\u00f3 dinamikus linkel\u00e9st.     <\/p>\n<p>A Java SE 25 a hossz\u00fa t\u00e1v\u00fa t\u00e1mogat\u00e1si id\u0151szakkal rendelkez\u0151 kiad\u00e1sok k\u00f6z\u00e9 tartozik, amelyre a friss\u00edt\u00e9sek 2033-ig fognak megjelenni (a nyilv\u00e1nos friss\u00edt\u00e9sek 2030 szeptember\u00e9ig). A Java SE 17 \u00e9s 21 szint\u00e9n hossz\u00fa t\u00e1v\u00fa t\u00e1mogat\u00e1si \u00e1gb\u00f3l sz\u00e1rmaznak, amelyek friss\u00edt\u00e9sei 2029-re \u00e9s 2031-re fognak megjelenni, a nyilv\u00e1nos friss\u00edt\u00e9sek pedig 2026-ig \u00e9s 2028-ig. A Java SE 8 \u00e9s 11 LTS \u00e1gai kiterjesztett t\u00e1mogat\u00e1sa 2030-ig \u00e9s 2032-ig tart.     <\/p>\n<p>A Java SE 25-ben bemutatott \u00fajdons\u00e1gok (1, 2, 3, 4):   <\/p>\n<ul>\n<li class=\"l\"> Bevezet\u00e9sre ker\u00fclt az Experimental API StableValue, amely az immutable adatokat tartalmaz\u00f3 objektumokkal dolgozik, \u00e9s amelyeket a JVM konstansk\u00e9nt kezel. Az ilyen objektumokra teljes\u00edtm\u00e9nyoptimaliz\u00e1l\u00f3 int\u00e9zked\u00e9seket alkalmaznak, amelyek hasonl\u00f3ak a 'final' kulcssz\u00f3val rendelkez\u0151 mez\u0151kh\u00f6z. A StableValue API elv\u00e1lasztja a konstans \u00e9rt\u00e9kek l\u00e9trehoz\u00e1s\u00e1t \u00e9s inicializ\u00e1l\u00e1s\u00e1t, garant\u00e1lja, hogy az \u00e9rt\u00e9k csak egyszer inicializ\u00e1lhat\u00f3, cs\u00f6kkenti a programok indul\u00e1si idej\u00e9t \u00e9s lehet\u0151v\u00e9 teszi a felhaszn\u00e1l\u00f3i k\u00f3dokban a konstansok cs\u00f6kkent\u00e9s\u00e9t (constant-folding), amely kor\u00e1bban csak a JDK bels\u0151 k\u00f3dj\u00e1ban volt haszn\u00e1lhat\u00f3. class Application {         \/\/ Volt:         \/\/ static final UserService USERS = new UserService();         \/\/ Leti:         static final StableValue USERS = StableValue.of();           public static UserService users() {            return USERS.orElseSet(UserService::new);         }      }\n<li class=\"l\"> Bevezett\u00fcnk egy k\u00eds\u00e9rleti API-t a kriptogr\u00e1fiai kulcsok, tan\u00fas\u00edtv\u00e1nyok \u00e9s visszavont tan\u00fas\u00edtv\u00e1nyok list\u00e1inak k\u00f3dol\u00e1s\u00e1hoz \u00e9s dek\u00f3dol\u00e1s\u00e1hoz, PEM (Pivacy-Enhanced Mail) form\u00e1tum haszn\u00e1lat\u00e1val.\n<li class=\"l\"> Bevezet\u00e9sre ker\u00fclt a korl\u00e1tozott \u00e9rt\u00e9kek (Scoped Values) t\u00e1mogat\u00e1sa, amely lehet\u0151v\u00e9 teszi az immutable adatok megoszt\u00e1s\u00e1t sz\u00e1lak k\u00f6z\u00f6tt \u00e9s hat\u00e9kony adatcser\u00e9t a gyermek sz\u00e1lak k\u00f6z\u00f6tt (az \u00e9rt\u00e9kek \u00f6r\u00f6kl\u0151dnek). A Scoped Values a sz\u00e1l-specifikus v\u00e1ltoz\u00f3k (thread-local variables) mechanizmus\u00e1t hivatottak helyettes\u00edteni, \u00e9s hat\u00e9konyabbak, ha nagyon nagy sz\u00e1m\u00fa virtu\u00e1lis sz\u00e1lat haszn\u00e1lnak (ezrek vagy milli\u00f3k sz\u00e1l). A f\u0151 k\u00fcl\u00f6nbs\u00e9g a Scoped Values \u00e9s a sz\u00e1l-specifikus v\u00e1ltoz\u00f3k k\u00f6z\u00f6tt az, hogy az el\u0151bbiek egyszer \u00edrhat\u00f3k, a k\u00e9s\u0151bbiekben nem m\u00f3dos\u00edthat\u00f3k, \u00e9s csak a sz\u00e1l fut\u00e1si ideje alatt hozz\u00e1f\u00e9rhet\u0151k.\n<li class=\"l\"> Bevezet\u00e9sre ker\u00fclt az API a kulcsk\u00e9pz\u0151 kriptogr\u00e1fiai funkci\u00f3k (KDF, key derivation function) haszn\u00e1lat\u00e1hoz, amelyek lehet\u0151v\u00e9 teszik tov\u00e1bbi, sz\u00fcks\u00e9ges hossz\u00fas\u00e1g\u00fa kulcsok l\u00e9trehoz\u00e1s\u00e1t egy titkos kulcs (p\u00e9ld\u00e1ul jelsz\u00f3) \u00e9s egy tetsz\u0151leges adatcsoport alapj\u00e1n.\n<li class=\"l\"> Elt\u00e1vol\u00edt\u00e1sra ker\u00fclt a k\u00f3d \u00e9s az \u00e9p\u00edt\u00e9si szkriptek a 32-bites x86 rendszerek t\u00e1mogat\u00e1s\u00e1hoz. A 32-bites x86 rendszerek t\u00e1mogat\u00e1s\u00e1nak le\u00e1ll\u00edt\u00e1sa lehet\u0151v\u00e9 tette a JDK \u00e9p\u00edt\u00e9si \u00e9s tesztel\u00e9si infrastrukt\u00far\u00e1j\u00e1nak egyszer\u0171s\u00edt\u00e9s\u00e9t, valamint olyan lehet\u0151s\u00e9gek megval\u00f3s\u00edt\u00e1s\u00e1t tette lehet\u0151v\u00e9, amelyek platform-specifikusak, an\u00e9lk\u00fcl, hogy fallback kezel\u0151ket kellett volna l\u00e9trehozni a 32-bites x86 rendszerekhez.\n<li class=\"l\"> Meg\u00e9rkezett a \"import module M\" kifejez\u00e9s haszn\u00e1lat\u00e1nak lehet\u0151s\u00e9ge, amely lehet\u0151v\u00e9 teszi az \u00f6sszes, az adott modul \u00e1ltal export\u00e1lt csomag egyidej\u0171 import\u00e1l\u00e1s\u00e1t. A v\u00e1ltoztat\u00e1s jelent\u0151sen egyszer\u0171s\u00edti a modul\u00e1ris k\u00f6nyvt\u00e1rak \u00fajrahasznos\u00edt\u00e1s\u00e1t, lehet\u0151v\u00e9 t\u00e9ve a k\u00f6nyvt\u00e1rak \u00e9s oszt\u00e1lyok csatlakoztat\u00e1s\u00e1t an\u00e9lk\u00fcl, hogy meghat\u00e1rozn\u00e1nk azok hely\u00e9t a csomaghierarchi\u00e1ban. P\u00e9ld\u00e1ul, az \"import module java.base\" megad\u00e1sa minden olyan 54 csomag import\u00e1l\u00e1s\u00e1hoz vezet, amely a java.base modulban tal\u00e1lhat\u00f3, amelyet kor\u00e1bban k\u00fcl\u00f6n kellett volna eml\u00edten\u00fcnk (\"import java.io.*\", \"import java.util.*\" stb.).\n<li class=\"l\"> Javasolt egy t\u00f6m\u00f6r programform\u00e1t, amely hasznos lehet tanulm\u00e1nyoz\u00e1shoz \u00e9s kisebb alkalmaz\u00e1sok fejleszt\u00e9s\u00e9hez. A t\u00f6m\u00f6r form\u00e1ban nem sz\u00fcks\u00e9ges felesleges oszt\u00e1lyok meghat\u00e1roz\u00e1sa, automatikusan import\u00e1l\u00f3dnak a tipikus API-k, \u00e9s el\u00e9rhet\u0151k az egyszer\u0171s\u00edtett bemeneti\/kimeneti m\u00f3dszerek. P\u00e9ld\u00e1ul a \"Hello, World!\" alkalmaz\u00e1s egyszer\u0171s\u00f6dhet: void main() { IO.println(\"Hello, World!\"); }\n<li class=\"l\"> Enged\u00e9lyezve lett a kifejez\u00e9sek megad\u00e1sa a szuperh\u00edv\u00e1sok el\u0151tt (...) a sz\u00fcl\u0151 oszt\u00e1ly konstruktora explicit h\u00edv\u00e1s\u00e1nak eset\u00e9n az \u00f6r\u00f6k\u00f6lt oszt\u00e1ly konstruktor\u00e1b\u00f3l, amennyiben ezek a kifejez\u00e9sek nem hivatkoznak az elk\u00e9sz\u00edtett konstruktor p\u00e9ld\u00e1nyra. class Outer { void hello() { System.out.println(\"Hello\"); } class Inner { Inner() { hello(); super(); } } }\n<li class=\"l\"> Hozz\u00e1adva a Shenandoah szem\u00e9tgy\u0171jt\u0151 generat\u00edv \u00fczemm\u00f3dja, amely k\u00fcl\u00f6n kezeli a r\u00e9gi \u00e9s a nemr\u00e9g l\u00e9trehozott objektumokat a r\u00f6vid \u00e9let\u0171 objektumok tiszt\u00edt\u00e1s\u00e1nak hat\u00e9konys\u00e1g\u00e1nak n\u00f6vel\u00e9se \u00e9rdek\u00e9ben. Az \u00faj \u00fczemm\u00f3d el\u0151re jelezhet\u0151bb \u00e1tereszt\u0151k\u00e9pess\u00e9get, terhel\u00e9sv\u00e1ltoz\u00e1sokkal szembeni ellen\u00e1ll\u00f3s\u00e1got \u00e9s a mem\u00f3riafogyaszt\u00e1s cs\u00f6kkent\u00e9s\u00e9t biztos\u00edtja a szem\u00e9tgy\u0171jt\u00e9s sor\u00e1n. A Shenandoah \u00fctemez\u0151 c\u00e9lja a meg\u00e1ll\u00e1si id\u0151k cs\u00f6kkent\u00e9se a szem\u00e9tgy\u0171jt\u00e9s alatt az\u00e1ltal, hogy nagyobb munkamennyis\u00e9get p\u00e1rhuzamosan v\u00e9gez a Java alkalmaz\u00e1sok futtat\u00e1s\u00e1val.\n<li class=\"l\"> Egyszer\u0171s\u00edtve lett a kezdeti (Ahead-of-Time) oszt\u00e1lyok bet\u00f6lt\u00e9s\u00e9hez \u00e9s \u00f6sszerak\u00e1s\u00e1hoz sz\u00fcks\u00e9ges gyors\u00edt\u00f3t\u00e1r l\u00e9trehoz\u00e1sa, amely felgyors\u00edtja a HotSpot JVM ind\u00edt\u00e1s\u00e1t az\u00e1ltal, hogy az oszt\u00e1lyokat m\u00e1r bet\u00f6lt\u00f6tt \u00e9s \u00f6sszerakott \u00e1llapotban haszn\u00e1lja. A futtat\u00e1s sor\u00e1n m\u00e1r nem sz\u00fcks\u00e9ges k\u00fcl\u00f6n m\u0171velet az aktivit\u00e1s \u00edr\u00e1s\u00e1hoz \u00e9s a gyors\u00edt\u00f3t\u00e1r l\u00e9trehoz\u00e1s\u00e1hoz, elegend\u0151 egy parancs: java -XX:AOTCacheOutput=app.aot -cp app.jar com.example.App ...\n<li class=\"l\"> A HotSpot Java VM ind\u00edt\u00e1sakor lehet\u0151s\u00e9g ny\u00edlik a m\u00f3dszerek v\u00e9grehajt\u00e1si profilj\u00e1nak haszn\u00e1lat\u00e1ra, amelyeket az alkalmaz\u00e1s el\u0151z\u0151 ind\u00edt\u00e1sakor szereztek be. A v\u00e1ltoz\u00e1s lehet\u0151v\u00e9 teszi, hogy a JIT ford\u00edt\u00f3 ne halmozza fel a statisztik\u00e1t, \u00e9s egyb\u0151l nat\u00edv k\u00f3dot gener\u00e1ljon a profil l\u00e9trehoz\u00e1s\u00e1nak v\u00e1rakoz\u00e1sa n\u00e9lk\u00fcl.\n<li class=\"l\"> A HotSpot JVM-ben megval\u00f3s\u00edtva a kompakt objektumfejl\u00e9cek t\u00e1mogat\u00e1sa, amelyek m\u00e9rete 64 bites rendszereken 96-r\u00f3l 64 bitre cs\u00f6kkent (12 b\u00e1jr\u00f3l 8 b\u00e1jtra). A fejl\u00e9cek m\u00e9ret\u00e9nek cs\u00f6kkent\u00e9se lehet\u0151v\u00e9 teszi a halom m\u00e9ret\u00e9nek cs\u00f6kkent\u00e9s\u00e9t \u00e9s a gyors\u00edt\u00f3t\u00e1r munk\u00e1j\u00e1nak hat\u00e9konys\u00e1g\u00e1nak n\u00f6vel\u00e9s\u00e9t.\n<li class=\"l\"> A javasolt API Vector tesztverzi\u00f3a, amely vektorgyors\u00edt\u00e1st biztos\u00edt a vektorisoktori sz\u00e1m\u00edt\u00e1sokhoz, a x86_64 \u00e9s AArch64 processzorok vektoros utas\u00edt\u00e1sainak haszn\u00e1lat\u00e1val lehet\u0151v\u00e9 teszi, hogy p\u00e1rhuzamosan t\u00f6bb \u00e9rt\u00e9kre (SIMD) alkalmazzunk m\u0171veleteket. Ezzel szemben a HotSpot JIT-compiler \u00e1ltal k\u00edn\u00e1lt automatikus vektoriz\u00e1l\u00e1si lehet\u0151s\u00e9gekkel a \u00faj API lehet\u0151s\u00e9get ad a vektoriz\u00e1l\u00e1s kifejezett kezel\u00e9s\u00e9re az adatok p\u00e1rhuzamos feldolgoz\u00e1sa \u00e9rdek\u00e9ben.\n<li class=\"l\"> Tesztel\u00e9sre javasolt\u00e1k az \u00f6t\u00f6dik el\u0151zetes verzi\u00f3t az API sz\u00e1m\u00e1ra, amely a struktur\u00e1lt p\u00e1rhuzamoss\u00e1got (Structured Concurrency) biztos\u00edt, egyszer\u0171s\u00edtve ezzel a t\u00f6bb sz\u00e1lon fut\u00f3 alkalmaz\u00e1sok fejleszt\u00e9s\u00e9t az\u00e1ltal, hogy a k\u00fcl\u00f6nb\u00f6z\u0151 sz\u00e1lakban v\u00e9gzett t\u00f6bb feladatot egyetlen blokk\u00e9nt kezel.\n<li class=\"l\"> A mintailleszt\u00e9si mechanizmusban javasolt egy harmadik el\u0151zetes lehet\u0151s\u00e9g a primit\u00edv t\u00edpusok (int, byte, char \u00e9s egy\u00e9b alapvet\u0151 t\u00edpusok, amelyek nem objektumok) haszn\u00e1lat\u00e1ra a sablonok minden form\u00e1j\u00e1ban, az \"instanceof\" oper\u00e1torban \u00e9s a \"switch\" blokkokban. switch (x.getStatus()) { case 0 -&gt; \"okay\"; case 1 -&gt; \"warning\"; case 2 -&gt; \"error\"; case int i -&gt; \"unknown status: \" + i; } if (i instanceof byte b) { ... b ... }\n<li class=\"l\"> A JDK Flight Recorder (JFR) k\u00eds\u00e9rleti t\u00e1mogat\u00e1st kapott a CPU-er\u0151forr\u00e1s-felhaszn\u00e1l\u00e1s pontosabb nyomon k\u00f6vet\u00e9s\u00e9re Linux platformon. A k\u00fcl\u00f6nb\u00f6z\u0151 konstrukci\u00f3k fut\u00e1si ideje sz\u00ednes diagramokkal, \u00fan. &#171;FlameGraph&#187; haszn\u00e1lat\u00e1val l\u00e1that\u00f3an vizualiz\u00e1lhat\u00f3.\n<li class=\"l\"> A JDK Flight Recorder (JFR) stabilit\u00e1sa javult a Java sz\u00e1lak verem mint\u00e1z\u00e1s\u00e1nak aszinkron m\u00f3dszer\u00e9ben, mivel csak a &#171;biztons\u00e1gos pontok&#187; (safepoints) h\u00edv\u00e1si veremmel val\u00f3 ker\u00fcl\u00e9s\u00e9vel m\u0171k\u00f6dik.\n<li class=\"l\"> A JDK Flight Recorder (JFR) eszk\u00f6z\u00f6ket kapott a m\u00f3dszerek fut\u00e1si idej\u00e9nek nyomoz\u00e1s\u00e1hoz \u00e9s \u00e9rt\u00e9kel\u00e9s\u00e9hez. T\u00e1mogatja a meghat\u00e1rozott m\u00f3dszerek h\u00edv\u00e1sainak nyomoz\u00e1s\u00e1t \u00e9s pontos statisztik\u00e1k r\u00f6gz\u00edt\u00e9s\u00e9t, amelyek olyan metrik\u00e1kat tartalmaznak, mint a fut\u00e1si id\u0151 \u00e9s a h\u00edv\u00e1sok sz\u00e1ma.              <\/ul>\n<p>Forr\u00e1s: <a content=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=63895\">opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u041f\u043e\u0441\u043b\u0435 \u0448\u0435\u0441\u0442\u0438 \u043c\u0435\u0441\u044f\u0446\u0435\u0432 \u0440\u0430\u0437\u0440\u0430\u0431\u043e\u0442\u043a\u0438 \u043a\u043e\u043c\u043f\u0430\u043d\u0438\u044f Oracle \u043e\u043f\u0443\u0431\u043b\u0438\u043a\u043e\u0432\u0430\u043b\u0430 \u043f\u043b\u0430\u0442\u0444\u043e\u0440\u043c\u0443 Java SE 25 (Java Platform, Standard Edition 24), \u0432 \u043a\u0430\u0447\u0435\u0441\u0442\u0432\u0435 \u044d\u0442\u0430\u043b\u043e\u043d\u043d\u043e\u0439 \u0440\u0435\u0430\u043b\u0438\u0437\u0430\u0446\u0438\u0438 \u043a\u043e\u0442\u043e\u0440\u043e\u0439 \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u0443\u0435\u0442\u0441\u044f \u043e\u0442\u043a\u0440\u044b\u0442\u044b\u0439 \u043f\u0440\u043e\u0435\u043a\u0442 OpenJDK. \u0417\u0430 \u0438\u0441\u043a\u043b\u044e\u0447\u0435\u043d\u0438\u0435\u043c \u0443\u0434\u0430\u043b\u0435\u043d\u0438\u044f \u043d\u0435\u043a\u043e\u0442\u043e\u0440\u044b\u0445 \u0443\u0441\u0442\u0430\u0440\u0435\u0432\u0448\u0438\u0445 \u0432\u043e\u0437\u043c\u043e\u0436\u043d\u043e\u0441\u0442\u0435\u0439 \u0432 Java SE 25 \u0441\u043e\u0445\u0440\u0430\u043d\u0435\u043d\u0430 \u043e\u0431\u0440\u0430\u0442\u043d\u0430\u044f \u0441\u043e\u0432\u043c\u0435\u0441\u0442\u0438\u043c\u043e\u0441\u0442\u044c \u0441 \u043f\u0440\u043e\u0448\u043b\u044b\u043c\u0438 \u0432\u044b\u043f\u0443\u0441\u043a\u0430\u043c\u0438 \u043f\u043b\u0430\u0442\u0444\u043e\u0440\u043c\u044b Java &#8212; \u0431\u043e\u043b\u044c\u0448\u0438\u043d\u0441\u0442\u0432\u043e \u0440\u0430\u043d\u0435\u0435 \u043d\u0430\u043f\u0438\u0441\u0430\u043d\u043d\u044b\u0445 Java-\u043f\u0440\u043e\u0435\u043a\u0442\u043e\u0432 \u0431\u0435\u0437 \u0438\u0437\u043c\u0435\u043d\u0435\u043d\u0438\u0439 \u0431\u0443\u0434\u0443\u0442 \u0440\u0430\u0431\u043e\u0442\u043e\u0441\u043f\u043e\u0441\u043e\u0431\u043d\u044b \u043f\u0440\u0438 \u0437\u0430\u043f\u0443\u0441\u043a\u0435 \u043f\u043e\u0434 [&hellip;]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[702],"tags":[],"class_list":["post-143670","post","type-post","status-publish","format-standard","hentry","category-news"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.3 - 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