Java Development Kit (JDK)

Java Development Kit (JDK)

Java Development Kit is the official development kit for the Java programming
language. Java Development Kit contains the software and tools that
you need to compile, debug, and run applets and applications written using the Java programming language.

JDK has a collection of programming tools, including javac, jar, and the
archiver, which packages related class libraries into a single JAR file. 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 other components are also included.

Key Contents include:

  • Development Tools
    (In the bin/ subdirectory) Tools and utilities that will help you develop,
    execute, debug, and document programs written in the JavaTM programming
  • Runtime Environment
    (In the jre/ subdirectory) An implementation of the Java Runtime Environment
    (JRE) for use by the JDK. 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.
  • Additional Libraries
    (In the lib/ subdirectory) Additional class libraries and support files
    required by the development tools.
  • Demo Applets and Applications
    (In the demo/ subdirectory) Examples, with source code, of programming for
    the Javaplatform. These include examples that use Swing and other Java
    Foundation Classes, and the Java Platform Debugger Architecture.
  • Sample Code
    (In the sample subdirectory) Samples, with source code, of programming for
    certain Java API’s.
  • C header Files (In the include/ subdirectory) Header files that support native-code
    programming using the Java Native Interface, the JVM Tool Interface, and
    other functionality of the Java platform.
  • Source Code
    (In Java programming language source files for all classes that make
    up the Java core API (that is, sources files for the java.*, javax.* and some
    org.* packages, but not for com.sun.* packages). This source code is provided
    for informational purposes only, to help developers learn and use the Java
    programming language. These files do not include platform-specific
    implementation code and cannot be used to rebuild the class libraries. To
    extract these file, use any common zip utility. Or, you may use the Jar
    utility in the JDK’s bin/ directory: jar xvf

The JDK also comes with a complete Java Runtime Environment. This consists of a Java Virtual Machine and all of the class
libraries present in the production environment, as well as additional libraries, internationalization
libraries and the IDL libraries.


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