install openjdk11

sudo add-apt-repository ppa:openjdk-r/ppa

sudo apt-get update

sudo apt install openjdk-11-jdk

sudo apt-get install openjdk-9-jdk

update-java-alternatives --list

sudo update-alternatives --config java

sudo update-alternatives --config javac

#JAVA_HOME=/usr/lib/jvm/jdk1.8.0_221

JAVA_HOME=/usr/lib/jvm/java-11-openjdk-amd64

export PATH=$JAVA_HOME/bin:$PATH

export JAVA_HOME

export JRE_HOME

export PATH