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Updating alternatives for JRE/JDK installations ----------------------------------------------- Packages providing a runtime or a development environment for the Java language all use symlinks in the /etc/alternatives directory to enable the system administrator to choose which programs to use for java, javac, javah, etc. The update-java-alternatives script can be used to set all the JRE/JDK alternatives: First, you have to decide which Java implementation to default to. update-java-alternatives --list tells about the available runtime and/or development environments. The first column shows the names to be used in for the following examples. - Set all runtime tools to point to the <jname> alternatives: update-java-alternatives --jre --set <jname> - Set all runtime tools (headless only) to point to the <jname> alternatives: update-java-alternatives --jre-headless --set <jname> - Set all runtime and development tools to point to the <jname> alternatives: update-java-alternatives --set <jname> - Set all runtime and development tools to auto mode: update-java-alternatives --auto