The legacy implementation also has other issues: a native data structure to support asynchronous close, causing reliability and porting issues, and concurrency issues requiring an overhaul.
Java jdk 13 download code#
The aforementioned legacy APIs date back to JDK 1.0 and comprise a mix of legacy C and Java code described as painful to debug and maintain. The new implementation is intended to be easy to adapt to work with user-mode threads, also known as fibers, which are being explored in Project Loom. A reimplementation of the legacy socket API, which replaces the underlying implementation used by the net.Socket and APIs with a simpler, more modern implementation that is easy to debug and maintain.Raw string literals had been projected for JDK 13 but never officially added to its proposed features list. Raw string literals focused on the rawness of strings, but the Java project team now believes that focus was wrong, because while raw string literals could span multiple lines of source code, they involved a costly requirement to support un-escaped delimiters. Raw string literals, a feature proposed for JDK 13 but dropped in favor of text blocks, took a different approach to the problem of denoting strings without escaping newlines and quotes. A third goal is supporting migration from string literals by stipulating that any new construct can express the same set of strings as a string literal, interpret the same escape sequences, and be manipulated like a string literal. A second goal is enhancing the readability of strings in programs that denote code written in non-Java languages. One goal is to simplify the writing of Java programs by making it easy to express strings spanning several lines of source code while avoiding escape sequences in common cases. The project cited a number of goals behind the addition of text blocks to Java. A text block automatically formats the string in a predictable manner and gives developers control over the format. A text block is a multi-line string literal that avoids the need for most escape sequences. The addition of text blocks in a preview phase.Here are the new features and improvements in JDK 13: It is no longer under consideration for JDK 13. One capability proposed for JDK 13 but never added to the official list, the jpackage tool for packaging self-contained Java applications, has missed the cut. Highlights include Z Garbage Collector enhancements, application class-data sharing, and previews of switch expressions and text blocks. Java Development Kit (JDK) 13, the latest version of standard Java, is now available as a production release.
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