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Completely uninstall and reinstall OpenJDK on Ubuntu

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linux-howto

http://askubuntu.com – I searched askubuntu and tried the suggestions but failed .I try this question:How to completely uninstall/reinstall Java 1.I run sudo apt-cache search openjdk get the following: openjdk-6-dbg - Java runtime based on OpenJDK (debugging symbols) openjdk-6-demo - Java runtime based on OpenJDK (demos and examples) openjdk-6-doc - OpenJDK Development Kit (JDK) documentation openjdk-6-jdk - OpenJDK Development Kit (JDK) openjdk-6-jre - OpenJDK Java runtime, using Hotspot JIT openjdk-6-jre-headless - OpenJDK Java runtime, using Hotspot JIT (headless) openjdk-6-jre-lib - OpenJDK Java runtime (archi (HowTos)