How to Install Java JDK in Kali Linux

1. Download the latest Java SE SDK version. 

Download Java SDK

At the time of writing the filename and version was jdk-7u45-linux-x64.tar.gz

2. Untar the Archive
jdk-7u45-linux-x64.tar.gz
mv jdk1.7.0_45 /opt
cd /opt/jdk1.7.0_45

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

root@lhackg~# update-alternatives --install /usr/bin/java java /opt/jdk1.7.0_45/bin/java 1
root@lhackg~# update-alternatives --install /usr/bin/javac javac /opt/jdk1.7.0_45/bin/javac 1
root@lhackg~# update-alternatives --install /usr/lib/mozilla/plugins/libjavaplugin.so mozilla-javaplugin.so /opt/jdk1.7.0_45/jre/lib/amd64/libnpjp2.so 1
root@lhackg~# update-alternatives --set java /opt/jdk1.7.0_45/bin/java
root@lhackg~# update-alternatives --set javac /opt/jdk1.7.0_45/bin/javac
root@lhackg~# update-alternatives --set mozilla-javaplugin.so /opt/jdk1.7.0_45/jre/lib/amd64/libnpjp2.so

4. TestTo check the version of Java you are now running

java -version

To check the browser plugin browse to site and click “Do I have Java?”


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