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Completely uninstall and reinstall OpenJDK

rated 0 times [ 13] [ 0] / answers: 1 / hits: 82038 / 3 Years ago, sun, july 18, 2021, 9:16:09

I searched askubuntu and tried the suggestions but failed .I try this question:How to completely uninstall 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 (architecture independent libraries) openjdk-6-source - OpenJDK Development Kit (JDK) source files icedtea-7-jre-jamvm - Alternative JVM for OpenJDK, using JamVM openjdk-6-jre-zero - Alternative JVM for OpenJDK, using Zero/Shark openjdk-7-dbg - Java runtime based on OpenJDK (debugging symbols) openjdk-7-demo - Java runtime based on OpenJDK (demos and examples) openjdk-7-doc - OpenJDK Development Kit (JDK) documentation openjdk-7-jdk - OpenJDK Development Kit (JDK) openjdk-7-jre - OpenJDK Java runtime, using Hotspot JIT openjdk-7-jre-headless - OpenJDK Java runtime, using Hotspot JIT (headless) openjdk-7-jre-lib - OpenJDK Java runtime (architecture independent libraries) openjdk-7-jre-zero - Alternative JVM for OpenJDK, using Zero/Shark openjdk-7-source - OpenJDK Development Kit (JDK) source files

2.run sudo apt-get remove openjdk get the following:
Reading package lists... Done Building dependency tree Reading state information... Done Package openjdk-7-jdk is not installed, so not removed 0 upgraded, 0 newly installed, 0 to remove and 182 not upgraded.

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nnaisdio

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3 Years ago

answered 3 Years ago olfdit · Accepted Answer

You cannot remove OpenJDK 7 because it is not installed. If you are trying to remove OpenJDK 6, try sudo apt-get remove openjdk-6-jdk, or sudo apt-get remove default-jdk.

apt-cache search only shows you available packages, not the packages you have installed. For that, try sudo dpkg --list; sudo dpkg --list | grep -i jdk will show you any JDK-related packages installed on your system.