Install oracle jre on Ubuntu script

ubuntu_java_installer.sh

#!/usr/bin/env bash

sudo wget --no-check-certificate --no-cookies --header "Cookie: oraclelicense=accept-securebackup-cookie" http://download.oracle.com/otn-pub/java/jdk/8u112-b15/server-jre-8u112-linux-x64.tar.gz

sudo mkdir /usr/lib/jvm

sudo tar -zxvf server-jre-8u112-linux-x64.tar.gz -C /usr/lib/jvm

sudo echo "export JAVA_HOME=/usr/lib/jvm/jdk1.8.0_112" >> ~/.bashrc
sudo echo "export JRE_HOME=${JAVA_HOME}/jre" >> ~/.bashrc
sudo echo "export CLASSPATH=.:${JAVA_HOME}/lib:${JRE_HOME}/lib" >> ~/.bashrc
sudo echo "export PATH=${JAVA_HOME}/bin:$PATH" >> ~/.bashrc
sudo source ~/.bashrc

sudo update-alternatives --install /usr/bin/java java /usr/lib/jvm/jdk1.8.0_112/bin/java 300
sudo update-alternatives --install /usr/bin/javac javac /usr/lib/jvm/jdk1.8.0_112/bin/javac 300
sudo update-alternatives --install /usr/bin/jar jar /usr/lib/jvm/jdk1.8.0_112/bin/jar 300
sudo update-alternatives --install /usr/bin/javah javah /usr/lib/jvm/jdk1.8.0_112/bin/javah 300
# javap : update-alternatives: error: alternative path /usr/lib/jvm/jdk1.8.0_112/bin/javap doesn't exist
# sudo update-alternatives --install /usr/bin/javap javap /usr/lib/jvm/jdk1.8.0_112/bin/javap 300
sudo update-alternatives --config java

java -version