Manage Java

// To install java
underversion=15.0.2

wget https://download.java.net/java/GA/jdk15.0.2/0d1cfde4252546c6931946de8db48ee2/7/GPL/openjdk-15.0.2_linux-x64_bin.tar.gz
gunzip openjdk-15.0.2_linux-x64_bin.tar.gz
tar xvf openjdk-15.0.2_linux-x64_bin.tar
mv jdk-$underversion /usr/local/java/$underversion
ln -fs /usr/local/java/$underversion/bin/java /usr/bin
ln -fs /usr/local/java/$underversion/bin/javac /usr/bin
ln -fs /usr/local/java/$underversion/bin/jar /usr/bin
rm -r *.tar

# To check java is installed correctly
java -version

// To uninstall java
rm -r /usr/local/java
rm -r /usr/bin/java
rm -r /usr/bin/javac
rm -r /usr/bin/jar