JDK Tools and Utilities

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Basic Tools

These tools are the foundation of the JDK. They are the tools you use to create and build applications.
javac     The compiler for the Java programming language.
java The launcher for Java applications. In this release, a single launcher is
         used both for development and deployment.
jdb         The Java Debugger.
javah       C header and stub generator. Used to write native methods.
javap     Class file disassembler.
extcheck    Utility to detect Jar conflicts.

Security Tools

These security tools help you set security policies on your system and create apps that can work within the scope of security policies set at remote sites.
keytool         Manage keystores and certificates.
jarsigner Generate and verify JAR signatures.
policytool GUI tool for managing policy files.

These security tools help you obtain, list, and manage Kerberos tickets.
kinit    Tool for obtaining Kerberos v5 tickets. Equivalent functionality is
   available on the Solaris operating environment via the kinit tool. For example,
   for Solaris 8, see the kinit reference page.
klist Command-line tool to list entries in credential cache and key tab.
   Equivalent functionality is available on the Solaris operating environment via
   the klist tool. For example, for Solaris 8, see the klist reference page.
ktab Command-line tool to help the user manage entires in the key table.
    Equivalent functionality is available on the Solaris operating environment via
    the kadmin tool. For example, for Solaris 8, see the kadmin reference page.


Internationalization Tools

This tool helps to create localizable apps.
native2ascii Convert text to Unicode Latin-1.


Monitoring and Management Tools

You can use the following tools to monitor JVM performance and resource consumption. The tools described in this section are unsupported and experimental, and should be used with that in mind. They may not be available in future JDK versions.

Platform support:

jconsole: all platforms.
jps, jstat, and jstatd: all platforms except Windows 98 and Windows ME.
For more information, see Monitoring and Management for the Java Platform.

jconsole Experimental: Java Monitoring and Management Console - JMX-compliant graphical tool for monitoring a Java virtual machine. It can monitor both local and remote JVMs.
jps   Experimental: JVM Process Status Tool - Lists instrumented HotSpot Java virtual machines on a target system.
jstat    Experimental: JVM Statistics Monitoring Tool - Attaches to an instrumented HotSpot Java virtual machine and collects and logs performance statistics as specified by the command line options.
jstatd    Experimental: JVM jstat Daemon - Launches an RMI server application that monitors for the creation and termination of instrumented HotSpot Java virtual machines and provides a interface to allow remote monitoring tools to attach to Java virtual machines running on the local system.


Troubleshooting Tools

The following tools can be used for specific troubleshooting tasks. The tools described in this section are unsupported and experimental in nature and should be used with that in mind. They may not be available in future JDK versions.
These tools are not currently available on Windows platforms.



jinfo   Experimental - Configuration Info for Java - Prints configuration information for for a given process or core file or a remote debug server.
jmap   Experimental - Memory Map for Java - Prints shared object memory maps or heap memory details of a given process or core file or a remote debug server.
jsadebugd Experimental - Serviceability Agent Debug Daemon for Java - Attaches to a process or core file and acts as a debug server.
jstack   Experimental - Stack Trace for Java - Prints a stack trace of threads for a given process or core file or remote debug server.