Sudo update-alternatives -remove "javaws" "/usr/lib/jvm/jdk/bin/javaws" Sudo update-alternatives -remove "javac" "/usr/lib/jvm/jdk/bin/javac" So if your version is 1.7.0_03, you would type sudo update-alternatives -remove "java" "/usr/lib/jvm/jdk1.7.0_03/bin/java") sudo update-alternatives -remove "java" "/usr/lib/jvm/jdk/bin/java" (replace the word (version)with your Java version. To check the setup before uninstalling Java. If the command above produces any output like /path/to/jre1.6.0_34/bin/pack200 remove the directory that is parent of bin, like this: sudo rm -rf /path/to/jre1.6.0_34. Search for possible remaining Java directories: sudo updatedb Remove Java entries, if there is still any, from the alternatives: for g in ControlPanel java java_vm javaws jcontrol jexec keytool mozilla-javaplugin.so orbd pack200 policytool rmid rmiregistry servertool tnameserv unpack200 appletviewer apt extcheck HtmlConverter idlj jar jarsigner javac javadoc javah javap jconsole jdb jhat jinfo jmap jps jrunscript jsadebugd jstack jstat jstatd native2ascii rmic schemagen serialver wsgen wsimport xjc do sudo update-alternatives -remove-all $g done Remove manually installed JVMs: sudo rm -rf /usr/lib/jvm/* Remove Java config and cache directory: sudo bash -c 'ls -d /home/*/.java' | xargs sudo rm -rf
Remove all the Java related packages (Sun, Oracle, OpenJDK, IcedTea plugins, GIJ): dpkg-query -W -f='$' | xargs sudo apt-get -y purge
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