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JAVA-CONFIG

Section: User Commands (1)
Updated: September 2011
Index Return to Main Contents

NAME

java-config - The Java configuration tool for Gentoo

SYNOPSIS

java-config [options]

DESCRIPTION

java-config Is used to query/set properties of your system's Java environment. It can be used to list available VMs, java packages, set system default JVM and set user default JVM.

In addition, it is used by Portage as a common interface to querying properties about the various JVMs.

OPTIONS

--select-vm=VM: Use this vm instead of the active vm when returning information.
-c, --javac: Show full path to currently selected Java compiler.
-j, --jar: Show full path to currently selected jar command.
-o, -O, --java-home, --jdk-home, --jre-home: Print JAVA_HOME of currently selected JVM.
-t, --tools: Print path to tools.jar
-v, --java-version: Query current JVM for version.
-p [pkg1[-SLOT],pkg2[-SLOT],...] --classpath[=package1,package2,...]: Calculate classpath for a package. If a package is installed in different slots you can also specify the slot to get the specific classpath informations.
-g VAR, --get-env=VAR: Print an environment variable from the active VM.
-e command, --exec=command: Run the specified JDK/JRE utility of the active vm, such as keytool , rmic and others.
-i PACKAGE(S), --library=PACKAGE(S): Print java library paths for these packages. Used for example in wrapper scripts like this: -Djava.library.path=$(java-config -i swt-3). Follows the same pkg[-SLOT] convention as for example --classpath.
-l, --list-available-packages: List available Java packages. Used for selection by --classpath
-L, --list-available-vms: Lists available JVMs. Used with --set-system-vm and -set-user-vm
-S <vm-id>, --set-system-vm=<vm-id>: Sets the system-wide default JVM.
-s <vm-id>, --set-user-vm=<vm-id>: Sets the user-specific JVM by putting all necessary env vars into $HOME/.gentoo/java-env .
-f, --show-active-vm: Show the JVM that's currently active, as set via --set-system-vm or --set-user-vm.
-n, --nocolor: Turn off all colors.
-P <vm-id>, --print=<vm-id>: Print the environment information for the specified virtual machine.
-d, --with-dependencies: Include package dependencies in --classpath and --library calls.
-r, --runtime: Print the runtime classpath.
--package=PACKAGE(S): Retrieve a value from a packages package.env file, value is specified by --query.
-q QUERY, --query=QUERY: Value to retieve from packages package.env file, specified by --package.
--get-virtual-providers=PACKAGE(S): Return a list of packages that provide a virtual.

NOTES

You can get the <vm-id> that is used with --set-system-vm=<vm-id> and --set-user-vm=<vm-id> in the output of java-config --list-available-vms inside the brackets. Ex. [blackdown-jdk-1.4.1] and you can use this to set your default Java Virtual Machine.