JDK Tools and Utilities


General

Standard JDK Tools and Utilities

Experimental JDK Tools and Utilities

NOTE - The tools described in this section are unsupported and experimental in nature and should be used with that in mind. They might not be available in future JDK versions.

Troubleshooting Documentation


NOTE - The Windows and Solaris, Linux, and OS X references pages for some tools have minor differences in configuration and usage -- for example, the character used to specify directory separators may be different.



General Information

The following documents contain important information you will need to know to get the most out of the JDK tools.

Document Type Platform
JDK File Structure [Solaris, Linux, and OS X] [Windows]
Setting the Classpath [Solaris, Linux, and OS X] [Windows]
How Classes are Found [All supported platforms]

Enhancements

The man page for each tool reflects the latest behavior for that tool, but the following page details the tools changes specific to a release.


Basic Tools

These tools are the foundation of the JDK. They are the tools you use to create and build applications.

Tool Name Brief Description Links to Reference Pages
appletviewer Run and debug applets without a web browser. [Solaris, Linux, and OS X] [Windows]
extcheck Utility to detect Jar conflicts. [Solaris, Linux, and OS X] [Windows]
jar Create and manage Java Archive (JAR) files.
See Java Archive Files page for the JAR specification.
[Solaris, Linux, and OS X] [Windows]
java The launcher for Java applications. In this release, a single launcher is used both for development and deployment.
The old deployment launcher, jre, is no longer provided.
[Solaris, Linux, and OS X] [Windows]
javac The compiler for the Java programming language. [Solaris, Linux, and OS X] [Windows]
javadoc API documentation generator.
See Javadoc Tool page for doclet and taglet APIs.
[Solaris, Linux, and OS X] [Windows]
javah C header and stub generator. Used to write native methods. [Solaris, Linux, and OS X] [Windows]
javap Class file disassembler [Solaris, Linux, and OS X] [Windows]
jdb The Java Debugger.
See JPDA for the debugger architecture specifications.
[Solaris, Linux, and OS X] [Windows]
jdeps Java class dependency analyzer [Solaris, Linux, and OS X] [Windows]

Security Tools

These security tools help you set security policies on your system and create applications that can work within the scope of security policies set at remote sites.
Tool Name Brief Description Links to Reference Pages
keytool Manage keystores and certificates. [Solaris, Linux, and OS X] [Windows]
jarsigner Generate and verify JAR signatures. [Solaris, Linux, and OS X] [Windows]
policytool GUI tool for managing policy files. [Solaris, Linux, and OS X] [Windows]

These security tools help you obtain, list, and manage Kerberos tickets.

Tool Name Brief Description Links to Reference Pages
kinit Tool for obtaining Kerberos v5 tickets. Equivalent functionality is available on the Solaris operating system via the kinit tool. For example, for Solaris 11, see the kinit reference page. [Windows]
klist Command-line tool to list entries in credential cache and key tab. Equivalent functionality is available on the Solaris operating system via the klist tool. For example, for Solaris 11, see the klist reference page. [Windows]
ktab Command-line tool to help the user manage entries in the key table. Equivalent functionality is available on the Solaris operating system via the kadmin tool. For example, for Solaris 11, see the kadmin reference page. [Windows]

Internationalization Tools

This tool helps to create localizable applications.
Tool Name Brief Description Links to Reference Pages
native2ascii Convert text to Unicode Latin-1. [Solaris, Linux, and OS X] [Windows]

Remote Method Invocation (RMI) Tools

These tools help to create applications that interact over the Web or other network.
Tool Name Brief Description Links to Reference Pages
rmic Generate stubs and skeletons for remote objects. [Solaris, Linux, and OS X] [Windows]
rmiregistry Remote object registry service. [Solaris, Linux, and OS X] [Windows]
rmid RMI activation system daemon. [Solaris, Linux, and OS X] [Windows]
serialver Return class serialVersionUID. [Solaris, Linux, and OS X] [Windows]

Java IDL and RMI-IIOP Tools

These tools are used when creating applications that use OMG-standard IDL and CORBA/IIOP.
Tool Name Brief Description Links to Reference Pages
tnameserv Provides access to the naming service. [Solaris, Linux, and OS X] [Windows]
idlj Generates .java files that map an OMG IDL interface and enable an application written in the Java programming language to use CORBA functionality. [Solaris, Linux, and OS X] [Windows]
orbd Provides support for clients to transparently locate and invoke persistent objects on servers in the CORBA environment. ORBD is used instead of the Transient Naming Service, tnameserv. ORBD includes both a Transient Naming Service and a Persistent Naming Service. The orbd tool incorporates the functionality of a Server Manager, an Interoperable Naming Service, and a Bootstrap Name Server. When used in conjunction with the servertool, the Server Manager locates, registers, and activates a server when a client wants to access the server. [Solaris, Linux, and OS X] [Windows]
servertool Provides ease-of-use interface for the application programmers to register, unregister, startup, and shutdown a server. [Solaris, Linux, and OS X] [Windows]

Java Deployment Tools

Utilities for use in conjunction with deployment of java applications and applets on the web.
Tool Name Brief Description Links to Reference Pages
javapackager Performs tasks related to packaging and signing Java and JavaFX applications. [Linux and OS X] [Windows]
pack200 Transforms a JAR file into a compressed pack200 file using the Java gzip compressor. The compressed packed files are highly compressed JARs, which can be directly deployed, saving bandwidth and reducing download time. [Solaris, Linux, and OS X] [Windows]
unpack200 Transforms a packed file produced by pack200 into a JAR file. [Solaris, Linux, and OS X] [Windows]

Java Web Start Tools

Utilities for use in conjunction with Java Web Start.
Tool Name Brief Description Links to Reference Pages
javaws Command line tool for launching Java Web Start and setting various options.
See Java Web Start Guide for more information.
[Solaris, Linux, and OS X] [Windows]

Java Troubleshooting, Profiling, Monitoring and Management Tools

Tool Name Brief Description Links to Reference Pages
jconsole A JMX-compliant graphical tool for monitoring a Java virtual machine. It can monitor both local and remote JVMs. It can also monitor and manage an application.
See Monitoring and Management for the Java Platform for more information.
[Solaris, Linux, and OS X] [Windows]

Java Web Services Tools

Tool Name Brief Description Links to Reference Pages
schemagen Schema generator for Java Architecture for XML Binding. [Solaris, Linux, and OS X] [Windows]
wsgen Tool to generate JAX-WS portable artifacts. [Solaris, Linux, and OS X] [Windows]
wsimport Tool to generate JAX-WS portable artifacts. [Solaris, Linux, and OS X] [Windows]
xjc Binding compiler for Java Architecture for XML Binding. [Solaris, Linux, and OS X] [Windows]

Monitoring Tools

You can use the following tools to monitor JVM performance statistics. 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.

These tools are supported on all platforms except Windows 98 and Windows ME.

Tool Name Brief Description Links to Reference Pages
jcmd Experimental: JVM Diagnostic Commands tool - Sends diagnostic command requests to a running Java Virtual Machine. [Solaris, Linux, and OS X] [Windows]
jps Experimental: JVM Process Status Tool - Lists instrumented HotSpot Java virtual machines on a target system. [Solaris, Linux, and OS X] [Windows]
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. [Solaris, Linux, and OS X] [Windows]
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. [Solaris, Linux, and OS X] [Windows]

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.

Some of these tools are not currently available on Windows platforms.

Tool Name Brief Description Links to Reference Pages
jinfo Experimental - Configuration Info for Java - Prints configuration information for a given process or core file or a remote debug server. [Solaris, Linux, and OS X] [Windows]
jhat Experimental - Heap Dump Browser - Starts a web server on a heap dump file (for example, produced by jmap -dump), allowing the heap to be browsed. [Solaris, Linux, and OS X] [Windows]
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. [Solaris, Linux, and OS X] [Windows]
jsadebugd Experimental - Serviceability Agent Debug Daemon for Java - Attaches to a process or core file and acts as a debug server. [Solaris, Linux, and OS X] [Windows]
jstack Experimental - Stack Trace for Java - Prints a stack trace of threads for a given process or core file or remote debug server. [Solaris, Linux, and OS X] [Windows]

Refer to the Java™ SE Troubleshooting web site for descriptions of tools, options, and other information to use in analyzing problems. The documents at this site contain suggestions about what to try before submitting a bug report and what data to collect for a report.


Scripting Tools

The following tools can be used to run scripts that interact with the Java platform.

Tool Name Brief Description Links to Reference Pages
jjs Runs the Nashorn command-line script shell. [Solaris, Linux, and OS X] [Windows]
jrunscript Experimental - Script shell for Java - Runs a script. This tool is unsupported and experimental in nature and should be used with that in mind. It might not be available in future JDK versions. [Solaris, Linux, and OS X] [Windows]

Copyright © 1993, 2014, Oracle and/or its affiliates. All rights reserved.