Extracts and installs jdk package

jdk-install.sh

#!/bin/bash

set -eou pipefail

if [ ! -f "$1" ]; then
    echo $1 is not readable.
    exit 1
fi

TEMPDIR=`mktemp -d`
cleanup()
{
    rm -r $TEMPDIR
    return $?
}
trap cleanup SIGINT

tar -C $TEMPDIR -xzf $1
cd $TEMPDIR
JDK=`ls`

sudo mv $JDK/ /opt/
sudo chown -R root:root /opt/$JDK
sudo ln -nsf /opt/$JDK /opt/jdk

sudo update-alternatives --install "/usr/bin/java" "java" "/opt/$JDK/bin/java" 1
sudo update-alternatives --install "/usr/bin/javac" "javac" "/opt/$JDK/bin/javac" 1
sudo update-alternatives --install "/usr/bin/javaws" "javaws" "/opt/$JDK/bin/javaws" 1
sudo update-alternatives --install "/usr/bin/jar" "jar" "/opt/$JDK/bin/jar" 1 
sudo update-alternatives --install "/usr/lib/mozilla/plugins/mozilla-javaplugin.so" "mozilla-javaplugin.so" "/opt/$JDK/jre/lib/amd64/libnpjp2.so" 1 

sudo update-alternatives --set "java" "/opt/$JDK/bin/java"
sudo update-alternatives --set "javac" "/opt/$JDK/bin/javac"
sudo update-alternatives --set "javaws" "/opt/$JDK/bin/javaws"
sudo update-alternatives --set "jar" "/opt/$JDK/bin/jar" 
sudo update-alternatives --set "mozilla-javaplugin.so" "/opt/$JDK/jre/lib/amd64/libnpjp2.so" 

cleanup