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(in the legal/ subdirectory) License and copyright files for each module.

(in the jmods/ subdirectory) Compiled modules used by jlink to create custom runtimes.

(In the include/ subdirectory) C-language header files that support native-code programming with the Java Native Interface and the Java Virtual Machine (JVM) Debugger Interface.

Files in this directory can be edited to change the JDK's access permissions, configure security algorithms, and set the Java Cryptography Extension Policy Files which might be used to limit the JDK's cryptographic strength.

(In the conf/ subdirectory) Files that contain user-configurable options.

For further information, see the JDK 18 tools specification at This directory also includes tools and utilities that will help you develop, execute, debug, and document programs written in the Java programming language.

The JRE includes a Java Virtual Machine (JVM™), class libraries, and other files that support the execution of programs written in the Java programming language. (In the bin/ subdirectory) An implementation of the Java Runtime Environment (JRE).

This section contains a general summary of the files and directories in the JDK. The version number is 18.0.1.1.Ĭomplete release notes for Java 18 can be found here. It consists of a Java Virtual Machine and all of the class libraries present in the production environment, as well as additional libraries only useful to developers, and such as the internationalization libraries and the IDL libraries.The full version string for this update release is 18.0.2+9 (where "+" means "build"). The JDK also comes with a complete Java Runtime Environment, usually called a private runtime. This tool also helps manage JAR files, javadoc - the documentation generator, which automatically generates documentation from source code comments, jdb - the debugger, jps - the process status tool, which displays process information for current Java processes, javap - the class file disassembler, and so many other components. JDK has as its primary components a collection of programming tools, including javac, jar, and the archiver, which packages related class libraries into a single JAR file. Java Development Kit contains the software and tools that you need to compile, debug, and run applets and applications that you've written using the Java programming language.