Installing Sun-Java JDK 7

Install Java JDK OS- MINT15, will work on on all Debian Based systems including ubuntu Easy Way: Simple and easy way to install JDK is to do it with apt-get repository. but noted that this some ti PPA becomes out dated.  This installs JDK 7 (which includes Java JDK, JRE and the Java browser plugin). Remove any installed version of open-JDK $ sudo apt-get purge openjdk-\* Add PPA and update apt-get repo $ sudo apt-get update $ sudo apt-get install python-software-properties $ sudo add-apt-repository ppa:webupd8team/java $ sudo apt-get update install it $ sudo apt-get install oracle-java7-installer Check version and process id Check your Java version to ensure installations and settings: $ java -version Verify that JPS (JVM Process Status tool) is up and running $ jps Manual way: 1) Remove any previous OpenJDK installations $ sudo apt-get purge openjdk-\* 2) Make directory to hold Sun Java $ sudo mkdir -p /usr/local/java 3) Download Oracle Java Sun (JDK/JRE) from Oracle’s website: JDK Download and JRE Download. Normally downloaded files will be placed in /home/<your_user_name>/Downloads folder. 4) Copy the downloaded files to the Java directory $ cd /home/<your_user_name>/Downloads $ sudo cp -r jdk-7u51-linux-x64.tar.gz /usr/local/java $ sudo cp -r jre-7u51-linux-x64.tar.gz /usr/local/java 5) Unpack the compressed binaries $ cd /usr/local/java $ sudo tar xvzf jdk-7u51-linux-x64.tar.gz $ sudo tar xvzf jre-7u51-linux-x64.tar.gz 6) Cross-check the extracted binaries: $ ls -a The following two folders should be created: jdk1.7.0_51 and jre1.7.0_51 7) To provide information about JDK/JRE paths to the system PATH (located in /etc/profile), first access the PATH: $sudo nano /etc/profile and add the following lines at the end: JAVA_HOME=/usr/local/java/jdk1.7.0_51 PATH=$PATH:$HOME/bin:$JAVA_HOME/bin JRE_HOME=/usr/local/java/jre1.7.0_51 PATH=$PATH:$HOME/bin:$JRE_HOME/bin export JAVA_HOME export JRE_HOME export PATH Save and exit (CTRL+O then Enter, then press CTRL+X then Enter) 8) Inform OS about Oracle Sun Java location to signal that it is ready for use: JDK is available: $ sudo update-alternatives --install "/usr/bin/javac" "javac" "/usr/local/java/jdk1.7.0_51/bin/javac" 1 JRE is available: $ sudo update-alternatives --install "/usr/bin/java" "java" "/usr/local/java/jre1.7.0_51/bin/java" 1 Java Web Start is available: $ sudo update-alternatives --install "/usr/bin/javaws" "javaws" "/usr/local/java/jre1.7.0_51/bin/javaws" 1 9) Make Oracle Sun JDK/JRE the default on your system: Set JRE: $ sudo update-alternatives --set java /usr/local/java/jre1.7.0_51/bin/java Set javac Compiler: $ sudo update-alternatives --set javac /usr/local/java/jdk1.7.0_51/bin/javac Set Java Web Start: $ sudo update-alternatives --set javaws /usr/local/java/jre1.7.0_51/bin/javaws 10) Re-load the /etc/profile $ source /etc/profile 11) Check your Java version to ensure installations and settings: $ java -version 12) Verify that JPS (JVM Process Status tool) is up and running $ jps This will show the process id of the jps process