![]() JDK and Java Runtime Environment (JRE) images are restructured to handle modules. The build system is enhanced to compile modules and enforce module boundaries at build time. The modularity aspects of Java 9 include application packaging, modularizing the JDK itself, and reorganizing source code into modules. Also, it should make Java better able to scale down to smaller devices while security and performance are improved. Java 9’s modularity is supposed to let developers more easily assemble and maintain sophisticated applications. Modularity has been called a “transitive” change, enabling understanding of dependencies across modules. Modularity-in the form of the Java Platform Module System-divides the JDK into a set of modules for combining at run, compile, or build time. The new, controversial modularity capabilities, based on Project Jigsaw, are sure to pique the interest of cutting-edge Java shops that want to see what JDK 9 has to offer now, even if more-conservative shops decide to wait for modularity to mature. The key new features in Java 9ĭebuting nearly three years after Java SE 8, Java SE 9 has several key architectural changes, as well as a host of improvements. Oracle has posted the Java SE 9 JDK and documentation for download by developers. ![]() It has several important if controversial new features, but is also the last of the line for the old style of Java delivery. Java 9-formally, Java Platform Standard Edition version 9-is finally here, and its Java Development Kit (JDK) is available for developers to download. ![]()
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