{"id":36537,"date":"2025-12-19T14:40:42","date_gmt":"2025-12-19T11:40:42","guid":{"rendered":"https:\/\/fatihsoysal.com\/blog\/?p=36537"},"modified":"2025-12-19T14:40:42","modified_gmt":"2025-12-19T11:40:42","slug":"java-11-ozellikleri-uzun-sureli-destek-ve-modern-gelistirme-icin-kapsamli-bir-bakis","status":"publish","type":"post","link":"https:\/\/fatihsoysal.com\/blog\/java-11-ozellikleri-uzun-sureli-destek-ve-modern-gelistirme-icin-kapsamli-bir-bakis\/","title":{"rendered":"Java 11 \u00d6zellikleri: Uzun S\u00fcreli Destek ve Modern Geli\u015ftirme \u0130\u00e7in Kapsaml\u0131 Bir Bak\u0131\u015f"},"content":{"rendered":"

<\/p>\n

Java 11 \u00d6zellikleri: Uzun S\u00fcreli Destek ve Modern Geli\u015ftirme \u0130\u00e7in Kapsaml\u0131 Bir Bak\u0131\u015f<\/h2>\n

Java ekosistemi, Oracle’\u0131n her alt\u0131 ayda bir yeni bir s\u00fcr\u00fcm yay\u0131nlama stratejisini benimsemesiyle s\u00fcrekli bir evrim i\u00e7indedir. Bu h\u0131zl\u0131 yay\u0131n d\u00f6ng\u00fcs\u00fc, geli\u015ftiricilere en son yenilikleri daha h\u0131zl\u0131 ula\u015ft\u0131rmay\u0131 hedeflerken, kurumsal d\u00fczeydeki uygulamalar i\u00e7in uzun vadeli istikrar ve destek beklentisi farkl\u0131 bir ihtiyac\u0131 do\u011furmu\u015ftur. \u0130\u015fte bu noktada, Java 11 kritik bir rol oynamaktad\u0131r. Eyl\u00fcl 2018’de yay\u0131nlanan Java 11, Java 8’den sonraki ikinci Uzun S\u00fcreli Destek (LTS) s\u00fcr\u00fcm\u00fc olup, kurumsal uygulamalar i\u00e7in g\u00fcvenilir bir temel sunmaktad\u0131r. Bu makale, Java 11’in getirdi\u011fi ba\u015fl\u0131ca \u00f6zellikleri, geli\u015ftiriciler i\u00e7in sundu\u011fu avantajlar\u0131 ve modern Java geli\u015ftirme s\u00fcre\u00e7lerindeki yerini detayl\u0131 bir \u015fekilde inceleyecektir.<\/p>\n

Java 11’in \u00d6nemi ve LTS Deste\u011fi<\/h3>\n

Java 11, Java platformunun evriminde \u00f6nemli bir d\u00f6n\u00fcm noktas\u0131n\u0131 temsil eder. Java 8’den bu yana gelen ilk LTS s\u00fcr\u00fcm\u00fc olmas\u0131, onu bir\u00e7ok kurumsal uygulaman\u0131n hedefi haline getirmi\u015ftir. LTS s\u00fcr\u00fcmleri, Oracle ve OpenJDK toplulu\u011fu taraf\u0131ndan uzun y\u0131llar boyunca g\u00fcvenlik g\u00fcncellemeleri ve hata d\u00fczeltmeleri almay\u0131 garanti eder. Bu durum, \u00f6zellikle b\u00fcy\u00fck ve kritik sistemler i\u00e7in stabilite ve s\u00fcrd\u00fcr\u00fclebilirlik a\u00e7\u0131s\u0131ndan hayati \u00f6nem ta\u015f\u0131r. Java 11’e ge\u00e7i\u015f yapan \u015firketler, en az\u0131ndan 2026’ya kadar resmi destek alman\u0131n rahatl\u0131\u011f\u0131n\u0131 ya\u015fayacaklard\u0131r. Bu, geli\u015ftirme ekiplerinin yeni \u00f6zelliklere odaklanmas\u0131na ve temel platformun g\u00fcvenli\u011fi konusunda endi\u015felenmemesine olanak tan\u0131r.<\/p>\n

Java 11, sadece uzun s\u00fcreli destek sunmakla kalmaz, ayn\u0131 zamanda Java 9 ve Java 10’da tan\u0131t\u0131lan bir\u00e7ok yenili\u011fi de b\u00fcnyesinde bar\u0131nd\u0131r\u0131r. Mod\u00fclerlik (JPMS), geli\u015ftirilmi\u015f performans, yeni API’ler ve daha temiz bir kod taban\u0131, Java 11’i modern Java uygulamalar\u0131 i\u00e7in cazip bir se\u00e7enek haline getirir. \u015eimdi, Java 11’in \u00f6ne \u00e7\u0131kan \u00f6zelliklerini daha yak\u0131ndan inceleyelim.<\/p>\n

Geli\u015ftirici Verimlili\u011fini Art\u0131ran Yenilikler<\/h3>\n

Java 11, geli\u015ftiricilerin g\u00fcnl\u00fck i\u015flerini kolayla\u015ft\u0131ran ve kod kalitesini art\u0131ran bir dizi yeni \u00f6zellik ve iyile\u015ftirme sunar. Bu yenilikler, \u00f6zellikle modern, temiz ve okunabilir kod yazmaya odaklanm\u0131\u015ft\u0131r.<\/p>\n

Var ile Lambda Parametreleri (JEP 323)<\/h4>\n

Java 10 ile tan\u0131t\u0131lan var<\/code> anahtar kelimesi, yerel de\u011fi\u015fken t\u00fcr \u00e7\u0131kar\u0131m\u0131 sa\u011flayarak kodun daha k\u0131sa ve okunabilir olmas\u0131n\u0131 sa\u011flam\u0131\u015ft\u0131. Java 11, bu \u00f6zelli\u011fi lambda ifadelerine geni\u015fletmi\u015ftir. Art\u0131k lambda parametrelerinde var<\/code> kullanarak de\u011fi\u015fken t\u00fcrlerini a\u00e7\u0131k\u00e7a belirtmek yerine, derleyicinin t\u00fcr\u00fc \u00e7\u0131karmas\u0131na izin verebilirsiniz. Bu \u00f6zellik, \u00f6zellikle lambda ifadelerine ek a\u00e7\u0131klamalar eklemek istedi\u011finizde kullan\u0131\u015fl\u0131d\u0131r.<\/p>\n

\u00d6rne\u011fin, Java 8\/9\/10’da \u015f\u00f6yle yaz\u0131l\u0131rd\u0131:<\/p>\n

(String s1, String s2) -> s1 + s2;<\/code><\/pre>\n
Java 11 ile var<\/code> kullanarak:<\/p>\n
(var s1, var s2) -> s1 + s2;<\/code><\/pre>\n
Bu, tek ba\u015f\u0131na \u00e7ok b\u00fcy\u00fck bir de\u011fi\u015fiklik gibi g\u00f6r\u00fcnmeyebilir, ancak lambda parametrelerine ek a\u00e7\u0131klamalar eklemek istedi\u011finizde var<\/code>‘\u0131n faydas\u0131 ortaya \u00e7\u0131kar:<\/p>\n
(@Nonnull var s1, @Nullable var s2) -> s1 + s2;<\/code><\/pre>\n
E\u011fer var<\/code> kullanmasayd\u0131n\u0131z, her iki parametrenin de a\u00e7\u0131k\u00e7a t\u00fcr belirtmesi gerekirdi ve bu, daha uzun ve tekrarlayan bir kod blo\u011fu olu\u015ftururdu. var<\/code> ile bu t\u00fcr senaryolarda kod daha temiz ve d\u00fczenli kal\u0131r.<\/p>\n
Yeni String Metotlar\u0131<\/h4>\n
Java 11, String<\/code> s\u0131n\u0131f\u0131na g\u00fcnl\u00fck programlama g\u00f6revlerini kolayla\u015ft\u0131ran be\u015f yeni metot eklemi\u015ftir:<\/p>\n
*   isBlank()<\/code>:<\/strong> Bir dizenin bo\u015f olup olmad\u0131\u011f\u0131n\u0131 veya sadece bo\u015fluk karakterleri i\u00e7erip i\u00e7ermedi\u011fini kontrol eder. trim().isEmpty()<\/code> kontrol\u00fcne benzer, ancak daha basittir.<\/p>\n
\" \".isBlank();      \/\/ true\n    \"\".isBlank();       \/\/ true\n    \"  hello  \".isBlank(); \/\/ false<\/code><\/pre>\n
*   strip()<\/code>:<\/strong> Dizinin ba\u015f\u0131ndaki ve sonundaki t\u00fcm bo\u015fluk karakterlerini (Unicode bo\u015fluklar\u0131 dahil) kald\u0131r\u0131r. trim()<\/code> metodunun daha kapsaml\u0131 bir versiyonudur, \u00e7\u00fcnk\u00fc trim()<\/code> sadece ASCII bo\u015fluk karakterlerini kald\u0131r\u0131r.<\/p>\n
\"\\t hello \\n\".strip(); \/\/ \"hello\"\n    \"  hello  \".trim();    \/\/ \"hello\" (ayn\u0131 sonu\u00e7, ancak farkl\u0131 bo\u015fluk t\u00fcrlerinde strip() daha etkilidir)<\/code><\/pre>\n
*   stripLeading()<\/code>:<\/strong> Dizinin ba\u015f\u0131ndaki bo\u015fluk karakterlerini kald\u0131r\u0131r.<\/p>\n
\"  hello  \".stripLeading(); \/\/ \"hello  \"<\/code><\/pre>\n
*   stripTrailing()<\/code>:<\/strong> Dizinin sonundaki bo\u015fluk karakterlerini kald\u0131r\u0131r.<\/p>\n
\"  hello  \".stripTrailing(); \/\/ \"  hello\"<\/code><\/pre>\n
*   repeat(int count)<\/code>:<\/strong> Diziyi belirtilen say\u0131da tekrarlar.<\/p>\n
\"na\".repeat(2); \/\/ \"nana\"\n    \"hello \".repeat(3); \/\/ \"hello hello hello \"<\/code><\/pre>\n
Bu metotlar, dize manip\u00fclasyonu i\u015flemlerini basitle\u015ftirir ve daha okunabilir kod yazmaya olanak tan\u0131r.<\/p>\n
Yeni File Metotlar\u0131<\/h4>\n
Dosya okuma ve yazma i\u015flemleri de Java 11 ile daha kolay hale gelmi\u015ftir. Files<\/code> s\u0131n\u0131f\u0131na iki yeni statik metot eklenmi\u015ftir:<\/p>\n
*   readString(Path path)<\/code>:<\/strong> Belirtilen dosyan\u0131n t\u00fcm i\u00e7eri\u011fini bir String<\/code> olarak okur.<\/p>\n
Path filePath = Files.writeString(Files.createTempFile(\"test\", \".txt\"), \"Hello Java 11!\");\n    String content = Files.readString(filePath);\n    System.out.println(content); \/\/ Hello Java 11!<\/code><\/pre>\n
*   writeString(Path path, CharSequence csq, OpenOption... options)<\/code>:<\/strong> Belirtilen CharSequence<\/code>‘\u0131 (genellikle bir String<\/code>) bir dosyaya yazar.<\/p>\n
Path filePath = Path.of(\"myFile.txt\");\n    Files.writeString(filePath, \"This is a test.\");<\/code><\/pre>\n
Bu metotlar, k\u00fc\u00e7\u00fck dosyalar\u0131n i\u00e7eri\u011fini okuma veya yazma i\u015flemlerini tek sat\u0131rda ger\u00e7ekle\u015ftirmeyi m\u00fcmk\u00fcn k\u0131larak BufferedReader<\/code> ve BufferedWriter<\/code> gibi daha d\u00fc\u015f\u00fck seviyeli API’lerle u\u011fra\u015fma ihtiyac\u0131n\u0131 azalt\u0131r.<\/p>\n
Collection to Array D\u00f6n\u00fc\u015f\u00fcm\u00fc<\/h4>\n
Collection<\/code> aray\u00fcz\u00fcne yeni bir toArray<\/code> metodu eklenmi\u015ftir: toArray(IntFunction generator)<\/code>. Bu metot, bir koleksiyonu belirli bir t\u00fcrde bir diziye d\u00f6n\u00fc\u015ft\u00fcrmek i\u00e7in daha modern ve verimli bir yol sunar.<\/p>\n
\u00d6nceki s\u00fcr\u00fcmlerde:<\/p>\n
List names = List.of(\"Alice\", \"Bob\");\nString[] namesArray = names.toArray(new String[0]); \/\/ veya new String[names.size()]<\/code><\/pre>\n
Java 11 ile:<\/p>\n
List names = List.of(\"Alice\", \"Bob\");\nString[] namesArray = names.toArray(String[]::new);<\/code><\/pre>\n
String[]::new<\/code> bir metot referans\u0131d\u0131r ve IntFunction<\/code> aray\u00fcz\u00fcn\u00fcn gerektirdi\u011fi apply(int value)<\/code> metodunu uygular. Bu, daha k\u0131sa ve okunabilir bir s\u00f6zdizimi sa\u011flar.<\/p>\n
Predicate.not() Metodu<\/h4>\n
Predicate<\/code> aray\u00fcz\u00fcne eklenen not()<\/code> statik metodu, var olan bir Predicate<\/code>‘\u0131n mant\u0131ksal tersini olu\u015fturmay\u0131 kolayla\u015ft\u0131r\u0131r. \u00d6zellikle stream API ile \u00e7al\u0131\u015f\u0131rken lambda ifadelerini daha okunabilir hale getirir.<\/p>\n
\u00d6nceki s\u00fcr\u00fcmlerde:<\/p>\n
List names = List.of(\"Alice\", \"Bob\", \"\", \"Charlie\");\nList nonEmptyNames = names.stream()\n                                  .filter(s -> !s.isEmpty())\n                                  .collect(Collectors.toList());<\/code><\/pre>\n
Java 11 ile:<\/p>\n
List names = List.of(\"Alice\", \"Bob\", \"\", \"Charlie\");\nList nonEmptyNames = names.stream()\n                                  .filter(Predicate.not(String::isEmpty))\n                                  .collect(Collectors.toList());<\/code><\/pre>\n
Bu, \u00f6zellikle karma\u015f\u0131k ko\u015fullarda veya bir Predicate<\/code>‘\u0131 yeniden kullan\u0131rken kodun amac\u0131n\u0131 daha net ifade etmeye yard\u0131mc\u0131 olur.<\/p>\n
HTTP Client API’nin Standardla\u015ft\u0131r\u0131lmas\u0131 (JEP 321)<\/h3>\n
Java 9’da deneysel olarak tan\u0131t\u0131lan ve Java 10’da k\u00fc\u00e7\u00fck iyile\u015ftirmeler alan yeni HTTP Client API, Java 11 ile java.net.http<\/code> paketi alt\u0131nda nihayet standart hale getirilmi\u015ftir. Bu, Java’da modern ve verimli HTTP\/2 ve WebSocket istemcileri olu\u015fturmak i\u00e7in uzun zamand\u0131r beklenen bir geli\u015fmedir.<\/p>\n
Yeni HTTP Client API, hem senkron hem de asenkron (CompletableFuture tabanl\u0131) istekleri destekler ve HTTP\/1.1 ile HTTP\/2 protokollerini kullanabilir. G\u00fc\u00e7l\u00fc, esnek ve kullan\u0131m\u0131 kolay bir API sunar.<\/p>\n
Basit bir GET iste\u011fi \u00f6rne\u011fi:<\/p>\n
import java.net.URI;\nimport java.net.http.HttpClient;\nimport java.net.http.HttpRequest;\nimport java.net.http.HttpResponse;\n\npublic class HttpClientExample {\n    public static void main(String[] args) throws Exception {\n        HttpClient client = HttpClient.newHttpClient();\n        HttpRequest request = HttpRequest.newBuilder()\n                .uri(URI.create(\"https:\/\/jsonplaceholder.typicode.com\/todos\/1\"))\n                .GET()\n                .build();\n\n        HttpResponse response = client.send(request, HttpResponse.BodyHandlers.ofString());\n\n        System.out.println(\"Status Code: \" + response.statusCode());\n        System.out.println(\"Response Body: \" + response.body());\n    }\n}<\/code><\/pre>\n
Asenkron bir istek \u00f6rne\u011fi:<\/p>\n
import java.net.URI;\nimport java.net.http.HttpClient;\nimport java.net.http.HttpRequest;\nimport java.net.http.HttpResponse;\nimport java.util.concurrent.CompletableFuture;\n\npublic class AsyncHttpClientExample {\n    public static void main(String[] args) {\n        HttpClient client = HttpClient.newHttpClient();\n        HttpRequest request = HttpRequest.newBuilder()\n                .uri(URI.create(\"https:\/\/jsonplaceholder.typicode.com\/todos\/2\"))\n                .GET()\n                .build();\n\n        CompletableFuture> responseFuture = \n            client.sendAsync(request, HttpResponse.BodyHandlers.ofString());\n\n        responseFuture.thenApply(HttpResponse::body)\n                      .thenAccept(System.out::println)\n                      .join(); \/\/ Asenkron i\u015flemi bekler\n    }\n}<\/code><\/pre>\n
Bu yeni API, \u00fc\u00e7\u00fcnc\u00fc taraf k\u00fct\u00fcphanelere ba\u011f\u0131ml\u0131l\u0131\u011f\u0131 azalt\u0131r ve Java geli\u015ftiricilerine modern web servisleriyle etkile\u015fim kurmak i\u00e7in yerel, y\u00fcksek performansl\u0131 bir \u00e7\u00f6z\u00fcm sunar.<\/p>\n
Tek Kaynak Dosya \u00c7al\u0131\u015ft\u0131rma (JEP 330)<\/h3>\n
Java 11 ile gelen bu \u00f6zellik, k\u00fc\u00e7\u00fck programlar veya betik benzeri uygulamalar i\u00e7in geli\u015ftirme s\u00fcrecini \u00f6nemli \u00f6l\u00e7\u00fcde basitle\u015ftirir. Art\u0131k tek bir Java kaynak dosyas\u0131n\u0131 do\u011frudan java<\/code> komutuyla \u00e7al\u0131\u015ft\u0131rabilirsiniz, derleme ad\u0131m\u0131na gerek kalmaz.<\/p>\n
\u00d6rne\u011fin, HelloWorld.java<\/code> ad\u0131nda bir dosyan\u0131z varsa:<\/p>\n
\/\/ HelloWorld.java\npublic class HelloWorld {\n    public static void main(String[] args) {\n        System.out.println(\"Hello from Java 11!\");\n    }\n}<\/code><\/pre>\n
Java 11’den \u00f6nce:<\/p>\n
javac HelloWorld.java\njava HelloWorld<\/code><\/pre>\n
Java 11 ile:<\/p>\n
java HelloWorld.java<\/code><\/pre>\n
Bu \u00f6zellik, \u00f6zellikle yeni ba\u015flayanlar i\u00e7in Java \u00f6\u011frenimini kolayla\u015ft\u0131r\u0131r, k\u00fc\u00e7\u00fck yard\u0131mc\u0131 programlar yazarken veya prototip olu\u015ftururken geli\u015ftirme d\u00f6ng\u00fcs\u00fcn\u00fc h\u0131zland\u0131r\u0131r. Ayr\u0131ca, shebang (#!<\/code>) sat\u0131r\u0131n\u0131 kullanarak betik benzeri Java dosyalar\u0131 olu\u015fturmak da m\u00fcmk\u00fcnd\u00fcr, bu da onlar\u0131 do\u011frudan \u00e7al\u0131\u015ft\u0131r\u0131labilir hale getirir.<\/p>\n
Performans ve Diagnostik \u0130yile\u015ftirmeleri<\/h3>\n
Java 11, sadece yeni API’ler getirmekle kalmaz, ayn\u0131 zamanda sanal makine (JVM) seviyesinde \u00f6nemli performans ve diagnostik iyile\u015ftirmeleri de sunar.<\/p>\n
Epsilon GC (JEP 318): No-Op Garbage Collector<\/h4>\n
Epsilon GC, “No-Op” (i\u015flem yapmayan) bir \u00e7\u00f6p toplay\u0131c\u0131d\u0131r. Yani, belle\u011fi tahsis eder ancak asla geri kazanmaz. Bu, ilk bak\u0131\u015fta garip gelebilir, ancak belirli senaryolar i\u00e7in \u00e7ok faydal\u0131d\u0131r:<\/p>\n
*   Performans Testleri:<\/strong> \u00c7\u00f6p toplama i\u015fleminin performans \u00fczerindeki etkisini tamamen ortadan kald\u0131rarak saf uygulama performans\u0131n\u0131 \u00f6l\u00e7mek i\u00e7in kullan\u0131l\u0131r.
\n*   \u00c7ok K\u0131sa \u00d6m\u00fcrl\u00fc Uygulamalar:<\/strong> \u00c7ok k\u0131sa s\u00fcrede tamamlanan ve \u00e7\u00f6p toplama i\u015fleminin ba\u015flamas\u0131na bile gerek kalmayacak uygulamalar i\u00e7in idealdir.
\n*   Bellek Kullan\u0131m Analizi:<\/strong> Uygulamalar\u0131n ne kadar bellek kulland\u0131\u011f\u0131n\u0131 ve ne zaman bellek d\u0131\u015f\u0131 hatas\u0131 verdi\u011fini g\u00f6zlemlemek i\u00e7in kullan\u0131labilir.<\/p>\n
Epsilon GC, java -XX:+UnlockExperimentalVMOptions -XX:+UseEpsilonGC<\/code> komutuyla etkinle\u015ftirilebilir.<\/p>\n
ZGC (JEP 333): D\u00fc\u015f\u00fck Gecikmeli \u00c7\u00f6p Toplay\u0131c\u0131<\/h4>\n
Z Garbage Collector (ZGC), Java 11’de deneysel olarak sunulan, \u00f6l\u00e7eklenebilir ve \u00e7ok d\u00fc\u015f\u00fck gecikmeli bir \u00e7\u00f6p toplay\u0131c\u0131d\u0131r. Hedefi, uygulama duraklamalar\u0131n\u0131 (pause times) milisaniyenin alt\u0131na indirmektir, hatta terabaytlarca belle\u011fe sahip heap’lerde bile.<\/p>\n
ZGC’nin temel \u00f6zellikleri:<\/p>\n
*   D\u00fc\u015f\u00fck Gecikme:<\/strong> \u00c7o\u011fu \u00e7\u00f6p toplama i\u015flemi e\u015fzamanl\u0131 olarak (uygulama i\u015f par\u00e7ac\u0131klar\u0131 \u00e7al\u0131\u015f\u0131rken) ger\u00e7ekle\u015ftirilir.
\n*   \u00d6l\u00e7eklenebilirlik:<\/strong> \u00c7ok b\u00fcy\u00fck heap’leri (terabaytlar) verimli bir \u015fekilde y\u00f6netebilir.
\n*   Daha Az Yap\u0131land\u0131rma:<\/strong> \u00c7o\u011fu durumda, kullan\u0131c\u0131lar\u0131n ZGC’yi manuel olarak ayarlamas\u0131na gerek kalmaz.<\/p>\n
ZGC, \u00f6zellikle b\u00fcy\u00fck veri i\u015fleme, ger\u00e7ek zamanl\u0131 sistemler ve y\u00fcksek performansl\u0131 sunucu uygulamalar\u0131 gibi d\u00fc\u015f\u00fck gecikmenin kritik oldu\u011fu alanlarda oyunun kurallar\u0131n\u0131 de\u011fi\u015ftirebilir. Java 11’de deneysel olmas\u0131na ra\u011fmen, sonraki s\u00fcr\u00fcmlerde daha da geli\u015ftirilerek kararl\u0131 hale gelmi\u015ftir. java -XX:+UnlockExperimentalVMOptions -XX:+UseZGC<\/code> ile etkinle\u015ftirilebilir.<\/p>\n
Java Flight Recorder (JFR) ve Mission Control’un A\u00e7\u0131k Kaynak Olmas\u0131 (JEP 328)<\/h4>\n
Java Flight Recorder (JFR), JVM’deki olaylar\u0131 kaydetmek i\u00e7in kullan\u0131lan g\u00fc\u00e7l\u00fc bir profil olu\u015fturma ve diagnostik arac\u0131d\u0131r. Daha \u00f6nce ticari bir \u00f6zellik olan JFR, Java 11 ile a\u00e7\u0131k kaynak hale getirilmi\u015f ve OpenJDK’ya dahil edilmi\u015ftir. Bu, t\u00fcm Java geli\u015ftiricilerinin bu g\u00fc\u00e7l\u00fc araca eri\u015febilece\u011fi anlam\u0131na gelir.<\/p>\n
JFR, performans\u0131 etkileyen darbo\u011fazlar\u0131, bellek s\u0131z\u0131nt\u0131lar\u0131n\u0131, kilitlenmeleri ve di\u011fer sorunlar\u0131 tespit etmek i\u00e7in kullan\u0131labilir. Uygulaman\u0131n \u00e7al\u0131\u015fma zaman\u0131 davran\u0131\u015f\u0131na dair zengin veriler toplar ve bu veriler Java Mission Control (JMC) gibi ara\u00e7larla g\u00f6rselle\u015ftirilip analiz edilebilir. JFR’nin a\u00e7\u0131k kaynak olmas\u0131, Java uygulamalar\u0131n\u0131n performans\u0131n\u0131 ve g\u00fcvenilirli\u011fini art\u0131rmak isteyen geli\u015ftiriciler i\u00e7in b\u00fcy\u00fck bir nimettir.<\/p>\n
Mod\u00fclerlik ve Temizleme<\/h3>\n
Java 9 ile ba\u015flayan mod\u00fclerlik (Java Platform Module System – JPMS) s\u00fcreci, Java 11 ile devam etmi\u015f ve platformun daha hafif, daha g\u00fcvenli ve daha s\u00fcrd\u00fcr\u00fclebilir hale gelmesi i\u00e7in baz\u0131 mod\u00fcller kald\u0131r\u0131lm\u0131\u015ft\u0131r.<\/p>\n
Nashorn JavaScript Motoru ve jjs Arac\u0131n\u0131n Kald\u0131r\u0131lmas\u0131 (JEP 335)<\/h4>\n
Java 8 ile tan\u0131t\u0131lan Nashorn JavaScript motoru, Java 11 ile birlikte kald\u0131r\u0131lm\u0131\u015ft\u0131r. Bunun nedeni, JavaScript ekosisteminin \u00e7ok h\u0131zl\u0131 geli\u015fmesi ve Nashorn’un bu h\u0131za ayak uydurmakta zorlanmas\u0131yd\u0131. JavaScript motoruna ihtiya\u00e7 duyan uygulamalar art\u0131k V8 motoru gibi alternatiflere y\u00f6nelebilirler. Bu kald\u0131rma, JDK’n\u0131n boyutunu k\u00fc\u00e7\u00fcltmeye ve bak\u0131m y\u00fck\u00fcn\u00fc azaltmaya yard\u0131mc\u0131 olur.<\/p>\n
Java EE ve CORBA Mod\u00fcllerinin Kald\u0131r\u0131lmas\u0131 (JEP 320)<\/h4>\n
Java 9’da kullan\u0131mdan kald\u0131r\u0131lan (deprecated) Java EE (Enterprise Edition) ve CORBA mod\u00fclleri, Java 11 ile JDK’dan tamamen kald\u0131r\u0131lm\u0131\u015ft\u0131r. Bu mod\u00fcller \u015funlar\u0131 i\u00e7erir:<\/p>\n
*   java.activation<\/code>
\n*   java.xml.ws<\/code> (JAX-WS)
\n*   java.xml.bind<\/code> (JAXB)
\n*   java.xml.ws.annotation<\/code>
\n*   java.corba<\/code>
\n*   java.transaction<\/code>
\n*   java.se.ee<\/code><\/p>\n
Bu kald\u0131rma, JDK’n\u0131n \u00e7ekirde\u011fini daha hafif ve modern tutma stratejisinin bir par\u00e7as\u0131d\u0131r. Java EE API’lerini kullanan uygulamalar\u0131n, bunlar\u0131 bir mod\u00fcl veya Maven\/Gradle ba\u011f\u0131ml\u0131l\u0131\u011f\u0131 olarak harici olarak eklemesi gerekecektir. Bu, geli\u015ftiricilere hangi ba\u011f\u0131ml\u0131l\u0131klar\u0131 kullanacaklar\u0131 konusunda daha fazla esneklik sa\u011flar ve JDK’n\u0131n temel i\u015flevselli\u011fini gereksiz y\u00fcklerden ar\u0131nd\u0131r\u0131r.<\/p>\n
Stack Walking API (JEP 329)<\/h4>\n
Java 11, \u00e7a\u011fr\u0131 y\u0131\u011f\u0131n\u0131n\u0131 (stack trace) daha verimli bir \u015fekilde dola\u015fmak i\u00e7in yeni bir Stack-Walking API<\/code> sunar. Bu API, StackWalker<\/code> s\u0131n\u0131f\u0131 arac\u0131l\u0131\u011f\u0131yla geli\u015ftiricilere y\u0131\u011f\u0131n izlerini daha esnek ve performansl\u0131 bir \u015fekilde inceleme olana\u011f\u0131 tan\u0131r. \u00d6zellikle g\u00fcvenlik y\u00f6neticileri veya profil olu\u015fturma ara\u00e7lar\u0131 gibi belirli \u00e7er\u00e7eveler i\u00e7in faydal\u0131d\u0131r. Geleneksel Thread.getStackTrace()<\/code> metoduna g\u00f6re daha iyi performans ve daha fazla kontrol sunar.<\/p>\n
Dynamic Class-File Constants (JEP 309)<\/h4>\n
Bu JEP, Java sanal makinesine (JVM) yeni bir sabit havuzu (constant pool) giri\u015fi olan CONSTANT_Dynamic<\/code> ekler. Bu, derleyicilerin ve \u00e7al\u0131\u015fma zaman\u0131n\u0131n, sabit havuzunda do\u011frudan sabit de\u011ferler yerine dinamik olarak hesaplanan sabitler kullanmas\u0131na olanak tan\u0131r. \u00d6zellikle lambda ifadeleri ve dinamik diller i\u00e7in daha verimli kod \u00fcretilmesini sa\u011flar ve gelecekteki JVM performans iyile\u015ftirmelerinin temelini olu\u015fturur.<\/p>\n
Neden Java 11’e Ge\u00e7melisiniz?<\/h3>\n
Java 11, bir LTS s\u00fcr\u00fcm\u00fc olarak, Java 8’den bu yana ge\u00e7en s\u00fcrede biriken t\u00fcm yenilikleri ve iyile\u015ftirmeleri bir araya getirir. Java 8’den veya daha eski bir s\u00fcr\u00fcmden y\u00fckseltme yapmay\u0131 d\u00fc\u015f\u00fcnen ekipler i\u00e7in Java 11, g\u00f6z \u00f6n\u00fcnde bulundurulmas\u0131 gereken ideal bir hedeftir.<\/p>\n
*   Uzun S\u00fcreli Destek:<\/strong> Kurumsal uygulamalar i\u00e7in kritik olan uzun vadeli g\u00fcvenlik g\u00fcncellemeleri ve hata d\u00fczeltmeleri sunar.
\n*   Geli\u015ftirilmi\u015f Performans:<\/strong> Yeni \u00e7\u00f6p toplay\u0131c\u0131lar (ZGC, Epsilon GC) ve JFR gibi ara\u00e7lar sayesinde uygulama performans\u0131n\u0131 izleme ve optimize etme yetenekleri art\u0131r\u0131lm\u0131\u015ft\u0131r.
\n*   Geli\u015ftirici Verimlili\u011fi:<\/strong> Yeni String<\/code>, File<\/code> metotlar\u0131, var<\/code> ile lambda parametreleri ve tek kaynak dosya \u00e7al\u0131\u015ft\u0131rma gibi \u00f6zellikler, geli\u015ftirme s\u00fcrecini h\u0131zland\u0131r\u0131r ve kodun okunabilirli\u011fini art\u0131r\u0131r.
\n*   Modernizasyon:<\/strong> Standardize edilmi\u015f HTTP Client API, modern web servisleriyle etkile\u015fim kurmak i\u00e7in g\u00fc\u00e7l\u00fc ve yerel bir \u00e7\u00f6z\u00fcm sunar.
\n*   Daha Temiz ve Hafif JDK:<\/strong> Eski ve nadiren kullan\u0131lan mod\u00fcllerin kald\u0131r\u0131lmas\u0131, JDK’n\u0131n daha k\u00fc\u00e7\u00fck ve daha y\u00f6netilebilir olmas\u0131n\u0131 sa\u011flar.
\n*   Gelece\u011fe Haz\u0131rl\u0131k:<\/strong> Java 11’e ge\u00e7i\u015f, Java 17 (bir sonraki LTS) ve sonraki s\u00fcr\u00fcmlere ge\u00e7i\u015f i\u00e7in bir basamak g\u00f6revi g\u00f6r\u00fcr, b\u00f6ylece en son Java yeniliklerinden faydalanmaya devam edebilirsiniz.<\/p>\n
Ge\u00e7i\u015f S\u0131ras\u0131nda Dikkat Edilmesi Gerekenler<\/h3>\n
Java 11’e ge\u00e7i\u015f yaparken baz\u0131 \u00f6nemli de\u011fi\u015fiklikleri g\u00f6z \u00f6n\u00fcnde bulundurmak gerekir:<\/p>\n
*   Mod\u00fcl Ba\u011f\u0131ml\u0131l\u0131klar\u0131:<\/strong> Java EE ve CORBA mod\u00fcllerinin kald\u0131r\u0131lmas\u0131 nedeniyle, bu API’leri kullanan projelerin ilgili ba\u011f\u0131ml\u0131l\u0131klar\u0131 manuel olarak eklemesi gerekecektir (\u00f6rne\u011fin, Maven veya Gradle \u00fczerinden).
\n*   JDK \u0130\u00e7 API’leri:<\/strong> Java 9 ile ba\u015flayan g\u00fc\u00e7l\u00fc kaps\u00fclleme (strong encapsulation) nedeniyle, uygulaman\u0131z JDK’n\u0131n i\u00e7 API’lerini kullan\u0131yorsa, illegal-access<\/code> uyar\u0131lar\u0131 alabilir veya IllegalAccessException<\/code> hatalar\u0131yla kar\u015f\u0131la\u015fabilirsiniz. Bu durumda, ya alternatif genel API’ler kullanmal\u0131 ya da ge\u00e7ici olarak --add-exports<\/code> veya --add-opens<\/code> gibi JVM arg\u00fcmanlar\u0131n\u0131 kullanmal\u0131s\u0131n\u0131z.
\n*   Nashorn Ba\u011f\u0131ml\u0131l\u0131\u011f\u0131:<\/strong> E\u011fer uygulaman\u0131z Nashorn JavaScript motorunu kullan\u0131yorsa, yerine ba\u015fka bir JavaScript motoru (\u00f6rne\u011fin GraalVM’nin JavaScript motoru) entegre etmeniz gerekecektir.
\n*   Derleme ve \u00c7al\u0131\u015fma Zaman\u0131 Ortamlar\u0131:<\/strong> Eski ara\u00e7lar ve k\u00fct\u00fcphaneler, Java 11 ile uyumlu olmayabilir. T\u00fcm ba\u011f\u0131ml\u0131l\u0131klar\u0131n\u0131z\u0131n ve derleme ara\u00e7lar\u0131n\u0131z\u0131n Java 11’i destekledi\u011finden emin olun.<\/p>\n
Sonu\u00e7<\/h3>\n
Java 11, Java platformu i\u00e7in \u00f6nemli bir kilometre ta\u015f\u0131d\u0131r. Bir Uzun S\u00fcreli Destek s\u00fcr\u00fcm\u00fc olarak, kurumsal geli\u015ftiricilere uzun vadeli istikrar ve g\u00fcvenilirlik sunarken, ayn\u0131 zamanda Java 9 ve 10’un getirdi\u011fi bir\u00e7ok yenili\u011fi de b\u00fcnyesinde bar\u0131nd\u0131r\u0131r. Yeni API’ler, geli\u015ftirilmi\u015f performans, daha iyi diagnostik ara\u00e7lar\u0131 ve daha temiz bir JDK, Java 11’i modern Java uygulamalar\u0131 geli\u015ftirmek i\u00e7in g\u00fc\u00e7l\u00fc ve cazip bir se\u00e7enek haline getirir.<\/p>\n
Java 8’den bu yana gelen \u00f6nemli de\u011fi\u015fiklikler nedeniyle, Java 11’e ge\u00e7i\u015f baz\u0131 ayarlamalar gerektirse de, uzun vadede sundu\u011fu avantajlar bu \u00e7abaya de\u011ferdir. Geli\u015ftiriciler, Java 11’in sundu\u011fu olanaklar\u0131 ke\u015ffederek daha verimli, performansl\u0131 ve s\u00fcrd\u00fcr\u00fclebilir uygulamalar geli\u015ftirebilirler. Java ekosisteminin s\u00fcrekli evriminde Java 11, sa\u011flam bir temel ve gelece\u011fe y\u00f6nelik bir k\u00f6pr\u00fc g\u00f6revi g\u00f6rmektedir.<\/body><\/p>\n","protected":false},"excerpt":{"rendered":"Java 11 \u00d6zellikleri: Uzun S\u00fcreli Destek ve Modern Geli\u015ftirme \u0130\u00e7in Kapsaml\u0131 Bir Bak\u0131\u015f\nJava ekosistemi, Oracle’\u0131n her alt\u0131 ayda bir yeni bir","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"csco_page_header_type":"","csco_page_load_nextpost":"","csco_page_subscribe_form":"","csco_page_contact_form":"","footnotes":""},"categories":[1408],"tags":[],"class_list":{"0":"post-36537","1":"post","2":"type-post","3":"status-publish","4":"format-standard","6":"category-java","7":"cs-entry","8":"cs-video-wrap"},"yoast_head":"\nJava 11 \u00d6zellikleri: Uzun S\u00fcreli Destek ve Modern Geli\u015ftirme \u0130\u00e7in Kapsaml\u0131 Bir Bak\u0131\u015f - 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