The JDK tools and their commands enable developers to handle development tasks such as compiling and running a program, packaging source files into a Java Archive (JAR) file, applying security policies to a JAR file, and more.
The tools and commands reference topic lists and describes the Java Development Kit (JDK) tools. They’re grouped into the following sections based on the related functions that they perform. Details about the tools and the commands that you use to run them are contained in the corresponding sections of this guide.
Main Tools
The following foundation tools and commands let you create and build applications:
javac: You can use the javac
tool and its options to read Java class and interface definitions and compile them into bytecode and class files.
javap: You use the javap
command to disassemble one or more class files.
javah: You use the javah
tool to generate C header and source files from a Java class.
javadoc: You use the javadoc
tool and its options to generate HTML pages of API documentation from Java source files.
java: You can use the java
command to launch a Java application.
appletviewer: You use the appletviewer
command to launch the AppletViewer and run applets outside of a web browser.
jar: You can use the jar
command to create an archive for classes and resources, and to manipulate or restore individual classes or resources from an archive.
jlink: You can use the jlink
tool to assemble and optimize a set of modules and their dependencies into a custom runtime image.
jmod: You use the jmod
tool to create JMOD files and list the content of existing JMOD files.
jdeps: You use the jdeps
command to launch the Java class dependency analyzer.
jdeprscan: You use the jdeprscan
tool as a static analysis tool that scans a jar file (or some other aggregation of class files) for uses of deprecated API elements.
Language Shell
The following tool gives you an interactive environment for trying out the Java language:
jshell: You use the jshell
tool to interactively evaluate declarations, statements, and expressions of the Java programming language in a read-eval-print loop (REPL).
Security Tools
The following security tools set security policies on your system and create applications that can work within the scope of security policies set at remote sites:
keytool: You use the keytool
command and options to manage a keystore (database) of cryptographic keys, X.509 certificate chains, and trusted certificates.
jarsigner: You use the jarsigner
tool to sign and verify Java Archive (JAR) files.
policytool: You use policytool
to read and write a plain text policy file based on user input through the utility GUI.
The following tools obtain, list, and manage Kerberos tickets on Windows:
kinit: You use the kinit
tool and its options to obtain and cache Kerberos ticket-granting tickets.
klist: You use the klist
tool to display the entries in the local credentials cache and key table.
ktab: You use the ktab
tool to manage the principal names and service keys stored in a local key table.
Remote Method Invocation (RMI) Tools
The following tools enable creating applications that interact over the Web or other network:
rmic: You use the rmic
compiler to generate stub and skeleton class files using the Java Remote Method Protocol (JRMP) and stub and tie class files (IIOP protocol) for remote objects.
rmiregistry: You use the rmiregistry
command to create and start a remote object registry on the specified port on the current host.
rmid: You use the rmid
command to start the activation system daemon that enables objects to be registered and activated in a Java Virtual Machine (JVM).
serialver: You use the serialver
command to return the serialVersionUID
for one or more classes in a form suitable for copying into an evolving class.
Java IDL and RMI-IIOP Tools
The following tools enable creating applications that use OMG-standard IDL and CORBA/IIOP:
tnameserv: You use the tnameserv
command as a substitute for Object Request Broker Daemon (ORBD).
idlj: You use the idlj
command to generate Java bindings for a specified Interface Definition Language (IDL) file.
orbd: You use the orbd
command for the client to transparently locate and call persistent objects on servers in the CORBA environment.
servertool: You use the servertool
command-line tool to register, unregister, start up, and shut down a persistent server.
Java Deployment Tools
The following utilities let you deploy Java applications and applets on the web:
pack200: You use the pack200
command to transform a Java Archive (JAR) file into a compressed pack200 file with the Java gzip compressor.
unpack200: You use the unpack200
command to transform a packed file into a JAR file for web deployment.
javapackager: You use the javapackager
command to perform tasks related to packaging Java and JavaFX applications.
Java Web Start
The following utility launches Java Web Start applications:
javaws: You use the javaws
tool command and its options to start Java Web Start.
Monitoring Tools
The following tools let you monitor performance statistics:
Note:
The following tools that are identified as experimental are unsupported and should be used with that understanding. They may not be available in future JDK versions.
jconsole: You use the jconsole
command to start a graphical console to monitor and manage Java applications.
jps: Experimental You use the jps
command to list the instrumented JVMs on the target system.
jstat: Experimental You use the jstat
command to monitor JVM statistics. This command is experimental and unsupported.
jstatd: Experimental You use the jstatd
command to monitor the creation and termination of instrumented Java HotSpot VMs. This command is experimental and unsupported.
jmc: You use the jmc
command and its options to launch Java Mission Control. Java Mission Control is a profiling, monitoring, and diagnostics tools suite.
Java Web Services Tools
The following tools let you create applications that provide web services:
schemagen: You can use the schemagen
tool and commands to generate a schema for every namespace that’s referenced in your Java classes.
wsgen: You use the wsgen
command to generate Java API for XML Web Services (JAX-WS) portable artifacts used in JAX-WS web services.
wsimport: You use the wsimport
command to generate Java API for XML Web Services (JAX-WS) portable artifacts.
xjc: You use the xjc
shell script to compile an XML schema file into fully annotated Java classes.
Java Accessibility Utilities
The following utilities let you check the accessibility of Java objects:
jaccessinspector: You use the jaccessinspector
accessibility evaluation tool for the Java Accessibility Utilities API to examine accessible information about the objects in the Java Virtual Machine.
jaccesswalker: You use the jaccesswalker
to navigate through the component trees in a particular Java Virtual Machine and presents the hierarchy in a tree view.
Troubleshooting Tools
The following tools let you perform specific troubleshooting tasks:
Note:
The following tools that are identified as experimental are unsupported and should be used with that understanding. They may not be available in future JDK versions. Some of these tools aren’t currently available on Windows platforms.
jcmd: You use the jcmd
utility to send diagnostic command requests to a running Java Virtual Machine (JVM).
jdb: You use the jdb
command and it’s options to find and fix bugs in Java platform programs.
jhsdb: You use the jhsdb
tool to attach to a Java process or to launch a postmortem debugger to analyze the content of a core dump from a crashed Java Virtual Machine (JVM).
jinfo: Experimental You use the jinfo
command to generate Java configuration information for a specified Java process. This command is experimental and unsupported.
jmap: Experimental You use the jmap
command to print details of a specified process. This command is experimental and unsupported.
jstack: Experimental You use the jstack
command to print Java stack traces of Java threads for a specified Java process. This command is experimental and unsupported.
Scripting Tools
The following tools let you run scripts that interact with the Java platform:
Note:
The following tools identified that are experimental are unsupported and should be used with that understanding. They may not be available in future JDK versions.
jjs: You use the jjs
command-line tool to invoke the Nashorn engine.
jrunscript: Experimental You use the jrunscript
command to run a command-line script shell that supports interactive and batch modes.