{"id":107370,"date":"2023-03-22T00:48:09","date_gmt":"2023-03-21T22:48:09","guid":{"rendered":"https:\/\/prohoster.info\/?p=107370"},"modified":"2023-03-22T11:10:35","modified_gmt":"2023-03-22T09:10:35","slug":"vypusk-java-se-20","status":"publish","type":"post","link":"https:\/\/prohoster.info\/sq\/blog\/novosti-interneta\/vypusk-java-se-20","title":{"rendered":"L\u00ebshimi i Java SE 20","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"
Pas pas gjasht\u00eb muajsh zhvillimi, kompania Oracle publikoi platform\u00ebn Java SE 20 (Java Platform, Standard Edition 20), e cila p\u00ebrdor projektin e hapur OpenJDK si implementimin referues. P\u00ebrve\u00e7 heqjes s\u00eb disa mund\u00ebsive t\u00eb vjetruara n\u00eb Java SE 20, ruhet politika e prapambetjes me versionet e kaluara t\u00eb platform\u00ebs Java \u2014 shumica e projekteve Java t\u00eb shkruara m\u00eb par\u00eb do t\u00eb funksionojn\u00eb pa asnj\u00eb ndryshim n\u00ebn menaxhimin e versionit t\u00eb ri. Nd\u00ebrtimet e gatshme p\u00ebr t'u instaluar t\u00eb Java SE 20 (JDK, JRE dhe Server JRE) jan\u00eb p\u00ebrgatitur p\u00ebr Linux (x86_64, AArch64), Windows (x86_64) dhe macOS (x86_64, AArch64). Implementimi referues i Java 20, i zhvilluar n\u00eb kuad\u00ebr t\u00eb projektit OpenJDK, \u00ebsht\u00eb plot\u00ebsisht i hapur n\u00ebn licenc\u00ebn GPLv2 me p\u00ebrjashtime t\u00eb GNU ClassPath, t\u00eb cilat lejojn\u00eb lidhjen dinamike me produkte komerciale. <\/p>\n
Java SE 20 \u00ebsht\u00eb kategorizuar si nj\u00eb version me mb\u00ebshtetje t\u00eb zakonshme, p\u00ebrdit\u00ebsimet e t\u00eb cilit do t\u00eb publikohen deri n\u00eb l\u00ebshimin e ardhsh\u00ebm. Si deg\u00eb me mb\u00ebshtetje t\u00eb zgjatur (LTS) duhet t\u00eb p\u00ebrdoret Java SE 17, p\u00ebrdit\u00ebsimet e t\u00eb cilit do t\u00eb publikohen deri n\u00eb vitin 2029. Kujtojm\u00eb se q\u00eb nga l\u00ebshimi i Java 10, projekti kaloi n\u00eb nj\u00eb proces t\u00eb ri zhvillimi, q\u00eb parashikon nj\u00eb cik\u00ebl m\u00eb t\u00eb shkurt\u00ebr p\u00ebr formimin e l\u00ebshimeve t\u00eb reja. Funksionaliteti i ri tani zhvillohet n\u00eb nj\u00eb deg\u00eb master t\u00eb vazhdueshme q\u00eb p\u00ebrfshin ndryshimet e gatshme dhe prej s\u00eb cil\u00ebs ndahen deg\u00ebt p\u00ebr stabilizimin e l\u00ebshimeve t\u00eb reja \u00e7do gjasht\u00eb muaj. <\/p>\n
Nga risit\u00eb e Java 20 mund t\u00eb p\u00ebrmenden: <\/p>\n
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\u00cbsht\u00eb propozuar mb\u00ebshtetje paraprake p\u00ebr vlerat e kufizuara (Scoped Values), t\u00eb cilat lejojn\u00eb ndarjen e t\u00eb dh\u00ebnave t\u00eb pandryshueshme midis threading dhe shk\u00ebmbimin efektiv t\u00eb t\u00eb dh\u00ebnave midis n\u00ebn-threadave (vlerat trash\u00ebgohen). Scoped Values jan\u00eb n\u00eb zhvillim p\u00ebr t\u00eb z\u00ebvend\u00ebsuar mekanizmin e variablave t\u00eb lokalizuar n\u00eb thread (thread-local variables) dhe jan\u00eb m\u00eb efikase kur p\u00ebrdoren shum\u00eb threada virtual\u00eb (mij\u00ebra dhe miliona threada). Diferenca kryesore midis Scoped Values dhe variablave lokal\u00eb n\u00eb thread \u00ebsht\u00eb se t\u00eb parat shkruhen nj\u00eb her\u00eb, nuk mund t\u00eb ndryshohen m\u00eb tej dhe mbeten t\u00eb disponueshme vet\u00ebm gjat\u00eb ekzekutimit t\u00eb threadit. class Server { final static ScopedValue CURRENT_USER = new ScopedValue(); void serve(Request request, Response response) { var level = (request.isAuthorized() ? ADMIN : GUEST); var user = new User(level); ScopedValue.where(CURRENT_USER, user) .run(() -> Application.handle(request, response)); } } class DatabaseManager { DBConnection open() { var user = Server.CURRENT_USER.get(); if (!user.canOpen()) throw new InvalidUserException(); return new DBConnection(...); } }\n
U shtua realizimi i dyt\u00eb paraprak i modeleve t\u00eb regjistrimeve (record pattern), q\u00eb zgjerojn\u00eb mund\u00ebsin\u00eb q\u00eb shfaqej n\u00eb Java 16 p\u00ebr p\u00ebrputhje me modelin n\u00eb m\u00ebnyr\u00eb p\u00ebr t\u00eb analizuar vlerat e klasave t\u00eb tipit regjistrimi. P\u00ebr shembull: record Point(int x, int y) {} static void printSum(Object obj) { if (obj instanceof Point p) { int x = p.x(); int y = p.y(); System.out.println(x + y); } }\n
\u00cbsht\u00eb shtuar nj\u00eb implementim i kat\u00ebrt paraprak i p\u00ebrputhjes me modelin n\u00eb shprehjet \u00abswitch\u00bb, i cili lejon p\u00ebrdorimin e modeleve fleksib\u00ebl n\u00eb etiketat \u00abcase\u00bb q\u00eb p\u00ebrfshijn\u00eb nj\u00eb seri vlerash, p\u00ebr t\u00eb cilat m\u00eb par\u00eb duhej t\u00eb p\u00ebrdoren zinxhir\u00eb t\u00eb gjer\u00eb shprehjesh \u00abif...else\u00bb. static String formatterPatternSwitch(Object obj) { return switch (obj) { case Integer i -> String.format(\u00abint %d\u00bb, i); case Long l -> String.format(\u00ablong %d\u00bb, l); case Double d -> String.format(\u00abdouble %f\u00bb, d); case String s -> String.format(\u00abString %s\u00bb, s); default -> o.toString(); }; }\n
\u00cbsht\u00eb shtuar nj\u00eb implementim i dyt\u00eb paraprak i API FFM (Foreign Function & Memory), i cili lejon organizimin e bashk\u00ebveprimit midis programeve Java dhe kodit dhe t\u00eb dh\u00ebnave t\u00eb jashtme p\u00ebrmes thirrjes s\u00eb funksioneve nga biblioteka t\u00eb jashtme dhe qasjes n\u00eb memorie jasht\u00eb JVM.\n
U shtua realizimi i dyt\u00eb paraprak i rrjedhave virtuale, q\u00eb p\u00ebrfaq\u00ebsojn\u00eb rrjedha t\u00eb lehta, duke e thjeshtuar ndjesh\u00ebm shkruarjen dhe mbajtjen e aplikacioneve shum\u00eb t\u00eb dh\u00ebna dhe me shum\u00eb rrjedha.\n
U shtua varianti i dyt\u00eb eksperimental i API p\u00ebr paralelizmin e strukturuar, q\u00eb thjeshton zhvillimin e aplikacioneve shum\u00eb t\u00eb dh\u00ebna p\u00ebrmes trajtimit t\u00eb disa detyrave, t\u00eb cilat ekzekutohen n\u00eb rrjedha t\u00eb ndryshme, si nj\u00eb bllok t\u00eb vet\u00ebm.\n
U shtua realizimi i pest\u00eb paraprak i API Vector, i cili ofron funksione p\u00ebr llogaritje vektoriale q\u00eb kryhen duke p\u00ebrdorur udh\u00ebzimet vektoriale t\u00eb procesor\u00ebve x86_64 dhe AArch64 dhe lejon aplikimin e operacioneve nj\u00ebher\u00ebsh n\u00eb disa vlera (SIMD). Ndryshe nga funksionet e ofruara nga kompajleri JIT HotSpot p\u00ebr avotizimin automatik t\u00eb operacioneve skalar, API i ri ofron mund\u00ebsin\u00eb p\u00ebr t\u00eb menaxhuar drejtp\u00ebrdrejt vektorizimin p\u00ebr p\u00ebrpunimin paralel t\u00eb t\u00eb dh\u00ebnave. <\/ul>\n