Installing JAVA on Ubuntu 14.04LTS

Install Oracle Java in Ubuntu 14.04LTS

9 Sep 2015
My script when I installed JAVA in my Ubuntu 14.04 64-bit
~$ sudo apt-add-repository ppa:webupd8team/java
~$ sudo apt-get update
~$ sudo apt-get install oracle-java8-installer

13 Mar 2015
This was my script when I installed JAVA SE JDK in my Ubuntu 14.04LTS.

• wget -c http://download.oracle.com/otn-pub/java/jdk/8u40-b26/jdk-8u40-linux-i586.tar.gz
• cp -r jdk-8u40-linux-i586.tar.gz /usr/local/java/
• sudo cp -r jdk-8u40-linux-i586.tar.gz /usr/local/java/
• cd /usr/local/java
• sudo tar xvzf jdk-8u40-linux-i586.tar.gz
• sudo gedit /etc/profile      ## and append the following:

            JAVA_HOME=/usr/local/java/jdk1.8.0_40
            JRE_HOME=$JAVA_HOME/jre
            PATH=$PATH:$HOME/bin:$JAVA_HOME/bin:$JRE_HOME/bin
            export JAVA_HOME
            export PATH

• sudo update-alternatives --install "/usr/bin/java" "java" "/usr/local/java/jdk1.8.0_40/bin/java" 1
• sudo update-alternatives --install "/usr/bin/javac" "javac" "/usr/local/java/jdk1.8.0_40/bin/javac" 1
• sudo update-alternatives --install "/usr/bin/javaws" "javaws" "/usr/local/java/jdk1.8.0_20/bin/javaws" 1
• sudo update-alternatives --install "/usr/bin/javaws" "javaws" "/usr/local/java/jdk1.8.0_40/bin/javaws" 1
• sudo update-alternatives --set java /usr/local/java/jdk1.8.0_40/bin/java
• sudo update-alternatives --set javac /usr/local/java/jdk1.8.0_40/bin/javac
• sudo update-alternatives --set javaws /usr/local/java/jdk1.8.0_40/bin/javaws
• source /etc/profile
• cd /usr/lib/mozilla/plugins ## create if none
• sudo ln -s /usr/local/java/jdk1.8.0_40/jre/lib/i386/libnpjp2.so
• java -version
• javac -version
• sudo reboot

Source: http://www.wikihow.com/Install-Oracle-Java-JDK-on-Ubuntu-Linux