install jdk kali linux

How to run a java program on Kail Linux - javatpoint

and

sudo update-alternatives install /usr/bin/java java /opt/jdk1.8.0_202/bin/java 1
sudo update-alternatives — install /usr/bin/javac javac /opt/jdk1.8.0_202/bin/javac
sudo update-alternatives — install /usr/lib/mozilla/plugins/libjavaplugin.so mozilla-javaplugin.so /opt/jdk1.8.0_202/jdk/lib/amd64/libnpjp2.so 1
sudo update-alternatives — set java /opt/jdk1.8.0_202/bin/java
sudo update-alternatives — set javac /opt/jdk1.8.0_202/bin/javac
java -jar decoder.jar