How to install Java in Kali Linux

Uncompress archive

Now you uncompress and move the whole uncompressed folder to /opt (optional) directory.

tar -xzvf /root/jdk-7u79-linux-x64.tar.gz
mv jdk1.7.0_79 /opt
cd /opt/jdk1.7.0_79

Install and register binaries

This step registers the downloaded version of Java as an alternative, and switches it to be used as the default:

update-alternatives --install /usr/bin/java java /opt/jdk1.7.0_79/bin/java 1
update-alternatives --install /usr/bin/javac javac /opt/jdk1.7.0_79/bin/javac 1
update-alternatives --install /usr/lib/mozilla/plugins/ /opt/jdk1.7.0_79/jre/lib/amd64/ 1
update-alternatives --set java /opt/jdk1.7.0_79/bin/java
update-alternatives --set javac /opt/jdk1.7.0_79/bin/javac
update-alternatives --set /opt/jdk1.7.0_79/jre/lib/amd64/

Testing your installation

First of all, close your browser and re-open. You won’t believe how many users actually forgets to do this step and later complains Java ain’t working. I’d advise to bookmark this site to be able to reopen these instructions quickly, or simply copy these into a leafpad / vi / text-editor.

To check the version of Java you are now running

java -version

To check the browser plugin just click Do I have Java?

This should take you to Oracles Java website and you will see a confirmation message.


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