The JDK has as its primary components a collection of programming tools, including: •
appletviewer – this tool can be used to run and debug Java applets without a web browser • apt – the
annotation-processing tool • extcheck – a utility that detects JAR file conflicts • idlj – the IDL-to-Java compiler. This utility generates Java
bindings from a given
Java IDL file. • jabswitch – the
Java Access Bridge. Exposes assistive technologies on Microsoft Windows systems. • java – the
loader for Java applications. This tool is an interpreter and can interpret the class files generated by the
javac compiler. Now a single launcher is used for both development and deployment. The old deployment launcher, jre, comes with Sun JDK, and instead it has been replaced by this new java loader. •
javac – the
Java compiler, which converts source code into
Java bytecode •
javadoc – the documentation generator, which automatically generates documentation from
source code comments •
jar – the archiver, which packages related class
libraries into a single
JAR file. This tool also helps manage JAR files. • javafxpackager – tool to package and sign JavaFX applications • jarsigner – the jar signing and verification tool • javah – the C header and stub generator, used to write native methods • javap – the class file
disassembler • javaws – the
Java Web Start launcher for JNLP applications •
JConsole – Java Monitoring and Management Console • jdb – the
debugger • jhat – Java Heap Analysis Tool (experimental) • jinfo – This utility gets configuration information from a running Java process or crash dump. (experimental) • jmap Oracle jmap – Memory Map– This utility outputs the memory map for Java and can print shared object memory maps or heap memory details of a given process or core dump. (experimental) • jmc – Java Mission Control • jpackage – a tool for generating self-contained application bundles. (experimental) • jps – Java Virtual Machine Process Status Tool lists the instrumented HotSpot Java Virtual Machines (JVMs) on the target system. (experimental) • jrunscript – Java command-line
script shell. •
jshell – a
read–eval–print loop, introduced in Java 9. • jstack – utility that prints Java
stack traces of Java threads (experimental) • jstat –
Java Virtual Machine statistics monitoring tool (experimental) • jstatd – jstat daemon (experimental) •
keytool – tool for manipulating the
keystore •
pack200 – JAR compression tool • policytool – the policy creation and management tool, which can determine policy for a Java runtime, specifying which permissions are available for code from various sources. •
VisualVM – visual tool integrating several
command-line JDK tools and lightweight performance and memory
profiling capabilities (no longer included in JDK 9+) • wsimport – generates portable
JAX-WS artifacts for invoking a web service. • xjc – Part of the Java API for XML Binding (JAXB) API. It accepts an XML schema and generates Java classes. Experimental tools may not be available in future versions of the JDK. The JDK also comes with a complete
Java Runtime Environment (JRE), usually called a
private runtime, due to the fact that it is separated from the "regular" JRE and has extra contents. 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, such as the
internationalization libraries and the
IDL libraries. Copies of the JDK also include a wide selection of example programs demonstrating the use of almost all portions of the
Java API. ==Other JDKs==