Java Uninstall – How to Remove Versions of OpenJDK

javaopenjdkuninstall

I am using Linux Mint XFCE 20.

Recently I installed Java by running sudo apt-get install openjdk and it automatically installed versions 8 and 11 of both JRE and JDK, including JRE headless.

It turns out that I needed only openjdk 16 to run what I wanted to, and having other versions of java are kinda pointless. My main issue is that programs default to version 8 and I can't seem to fix it.

So how can I uninstall both versions 11 and 8 and just keep 16?

Best Answer

The unwanted versions can be removed by name:

sudo apt remove openjdk-8-jdk
sudo apt remove openjdk-11-jdk

They are installed with different packages.

You can see all the openjdk packages available with this command:

sudo apt update
apt-cache search openjdk

You can see all openjdk packages in your system with:

dpkg -l | grep openjdk

Note: I am a RedHat user, not a Mint expert but this is pretty much the same on every distro. I just checked the package names on Mint for those commands to work.

Related Solutions

Java 8 JDK install on OpenSUSE – Update Alternatives

The process of executing this install is easier than most think and surprisingly there is not much good or direct info out there on how to do this. The above answer is correct, but has some elements which are a bit outdated.

Download Oracle JDK 1.8.0_151

#// rpm Installation Oracle JDK 1.8.0_151
wget --no-check-certificate --no-cookies --header "Cookie: oraclelicense=accept-securebackup-cookie"  http://download.oracle.com/otn-pub/java/jdk/8u151-b12/e758a0de34e24606bca991d704f6dcbf/jdk-8u151-linux-x64.rpm

Run installation command

#// installation command
rpm -ivh jdk-8u151-linux-x64.rp

Verify the version is configured / installed to your prefernce
```
java -version
```

Set the environment variables using the command line interface or editor

#//Command line 
export JAVA_HOME=/usr/java/jdk1.8.0_151/
export PATH=$PATH:/usr/java/jdk1.8.0_151/bin

#// set variables at the END of the file etc/profile
sudo vim /etc/profile/

#//Variables to set within the file
JAVA_HOME=/usr/java/jdk1.8.0_151
PATH=$Path:$HOME/bin:@JAVA_HOME/bin
export JAVA_HOME
export PATH

#//To save / exit vim execute the following key strokes
<ESC>
<:>
<x>

Best Answer

Related Solutions

Java 8 JDK install on OpenSUSE – Update Alternatives

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