![]() That means, a switch expression (returning a value) should use yield, and a switch statement (not returning a value) should use break.įor example: System.out. JEP 354 modifies this feature, it introduces the yield statement for returning a value from a block instead of using break. Switch Expressions are introduced in JDK 12 as a preview feature. It shows the old implementation is now used. $PlatformSocketOptions$1 source: jrt:/jdk.net $PlatformSocketOptions source: jrt:/jdk.net Now lets set the system property and run again: $ java -XX:+TraceClassLoading JEP353 | grep Socket NioSocketImpl above is the new implementation. SocketDispatcher source: jrt:/java.base Here is the default (new): java -XX:+TraceClassLoading JEP353 | grep Socket Running a class instantiating Socket and ServerSocket will show this debug output. The modern implementation is the default in Java 13, but the old implementations are not removed yet, and they can be used instead by setting the system property. The implementations for and is pretty old and this JEP introduces a modern implementation for them. JEP 353: Reimplement the Legacy Socket API This JEP addresses this issue and enables this capability by default. ![]() ZGC is introduced in JDK 11, but until now it was not returning the unused heap memory to the operating system unlike the G1 Garbage Collector. JAVA 13 TEXT BLOCKS ARCHIVEThen running the application with -XX:SharedArchiveFile= enables sharing of class data on top of the system default archive in the JDK. Instead of providing a class list, an archive can be generated when the program exists by using -XX:ArchiveClassesAtExit=. ![]() This JEP simplifies using application class data sharing (AppCDS). The list is taken from the OpenJDK JDK 13 project page. Using EA build 24 ().ĩ: First time this post is published. You need to use –enable-preview to use such features. If something is a preview feature, it is fully specified and implemented, but provided in a release to gather feedback, thus it is not a permanent change yet. JAVA 13 TEXT BLOCKS UPDATEI am planning to update this post when a new feature (JEP) is targeted for JDK 13, or when there is an important update on an already targeted JEP. We can't make a single-line string with text blocks.Ī line terminator must follow the initial triple-double quotations.This is an alive post of what will become Java 13, and, as expected, this post will expand and change over time, until the development of Java 13 is freezed in 2019. It's a more convenient approach to make multiline strings. ![]() There are no additional properties on the string object formed with text blocks. A pair of triple-double quotations must surround the multiline string. It makes it simple to construct multiline strings. ![]() DOM and SAX Factories with Namespace Support.Reimplement the Legacy Socket API - JEP 353.Switch Expressions Enhancements - JEP 354.New Methods in String Class for Text Blocks.Enhancements to Z Garbage Collector, application class-data sharing, and previews of switch statements and text blocks are some of the features. Text block avoids using lots of escapes and concatenation. A text block is useful to embed a snippet of HTML, XML, SQL, or JSON in a string literal '.'. Text block has been adopted as permanent language feature in Java 15 (JEP 355). Because of the 6-month release schedule, there aren't many developer-specific features in Java 13. Text block was introduced in Java 13 as preview feature and previewed again in Java 14. On September 17th, 2019, Java 13 was made available for production use. ![]()
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