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JDK in JAVA
JDK in JAVA stands for Java Development Kit. As the name suggest, the JDK is one of the key components that foster a conducive runtime environment for JAVA programs and applets to run. In terms of components, the JDK is can be thought of a conglomerate of JRE (Java Runtime Environment) and development tools. The JDK is an implementation one of the following platforms in cooperation with Oracle:
- Standard Edition Java Platform
- Enterprise Edition Java Platform
- Micro Edition Java Platform
Contents in a JDK
The JDK contains a private JVM (Java Virtual Machine) and a few other components namely an interpreter/loader (JAVA), a compiler (javac), an archiver (jar), a documentation generator (Javadoc) etc, to ensure proper execution of a Java application or applet.
Components of JDK
| Component | Use |
| appletviewer: | If you are not using a web browser, this tool is primarily used to execute and debug Java applets. |
| apt: | An annotation-processing tool. |
| extcheck: | Used to detect conflicts in JAR files. |
| idlj: | It is an IDL-to-Java compiler. |
| java: | This is the main component that is required to load and interpret java class files. |
| javac: | The compiler which converts source code into byte code. |
| javadoc: | Source code document generator. |
| jar: | Helps manage JAR files. |
| javafxpackager: | Tool to package and sign JavaFX applications. |
| jarsigner: | Signing and verification tool. |
| javah: | For writing native methods. |
| javap: | Class file diassembler. |
| javaws: | Java Web Start Launcher. |
| JConsole: | Java Monitoring and Management Console. |
| jdb: | Debugger. |
| jhat: | Java Heap Analysis Tool. |
| jinfo: | Gets configuration information from current Java processes. |
| jmap: | Oracle Memory Map. |
| jmc: | Java Mission Control. |
| jps: | Java Virtual Machine Process Status Tool. |
| jrunscript: | Java command-line script shell. |
| jstack: | Prints Java stack traces. |
| jstat: | Java Virtual Machine statistics monitoring tool. |
| Jstatd: | Jstat daemon. |
| keytool: | For manipulating the keystore. |
| pack200: | JAR compression tool. |
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