sudo mv /opt/jdk1.8.0_91/ /usr/lib/jvm/
cd /usr/lib/jvm/
ls /usr/lib/jvm/
HOW TO INSTALL
sudo update-alternatives --install "/usr/bin/java" "java" "/usr/lib/jvm/jdk1.8.0_91/bin/java" 1
sudo update-alternatives --install "/usr/bin/javac" "javac" "/usr/lib/jvm/jdk1.8.0_91/bin/javac" 1
sudo update-alternatives --install "/usr/bin/javaws" "javaws" "/usr/lib/jvm/jdk1.8.0_91/bin/javaws" 1
sudo update-alternatives --install "/usr/bin/jar" "jar" "/usr/lib/jvm/jdk1.8.0_91/bin/jar" 1
sudo chown -R root:root /usr/lib/jvm/jdk1.8.0_91/
sudo update-alternatives --config java
HOW TO REMOVE
sudo update-alternatives --remove java /opt/jdk1.8.0_91/
sudo update-alternatives --config java
export JAVA_HOME=/usr/lib/jvm/jdk1.8.0_91
export JRE_HOME=/usr/lib/jvm/jdk1.8.0_91/jre
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