INSTALL ORACLE JAVA 7 IN UBUNTU 12.10

To install Java in Ubuntu/Linux  open Terminal (Press Ctrl+Alt+T) and copy the following commands in the Terminal:

• sudo mkdir -p /usr/local/java

For 32-bit users:

• wget -O jre-32bit.tar.gz http://goo.gl/5UycT
• wget -O jdk-32bit.tar.gz http://goo.gl/YPKJz
• sudo -s cp -r jre-32bit.tar.gz /usr/local/java
• sudo -s cp -r jdk-32bit.tar.gz /usr/local/java
• cd /usr/local/java
• sudo -s tar xvzf jre-32bit.tar.gz
• sudo -s tar xvzf jdk-32bit.tar.gz

For 64-bit users:

• wget -O jdk-64bit.tar.gz http://goo.gl/MSzBj
• wget -O jre-64bit.tar.gz http://goo.gl/yZgjI
• sudo -s cp -r jre-64bit.tar.gz /usr/local/java
• sudo -s cp -r jdk-64bit.tar.gz /usr/local/java
• cd /usr/local/java
• sudo -s chmod a+x jre-64bit.tar.gz
• sudo -s chmod a+x jdk-64bit.tar.gz
• sudo -s tar xvzf jre-64bit.tar.gz
• sudo -s tar xvzf jdk-64bit.tar.gz

Now you need to enter these command (both 32-bit and 64-bit users):

• sudo nano /etc/profile

Add the following lines at the end of file:

JAVA_HOME=/usr/local/java/jdk*
PATH=$PATH:$HOME/bin:$JAVA_HOME/bin
JRE_HOME=/usr/local/java/jre*
PATH=$PATH:$HOME/bin:$JRE_HOME/bin
export JAVA_HOME
export JRE_HOME
export PATH

Copy above lines and to paste in terminal (Press Ctrl+Shift+V) and to save file using nano (Press Ctrl+O) then (Press Ctrl+X) to exit from file.

Now enter following commands one by one in terminal:

• sudo update-alternatives –install “/usr/bin/java” “java” “/usr/local/java/jre1.7.0_12/bin/java” 1
• sudo update-alternatives –install “/usr/bin/javac” “javac” “/usr/local/java/jdk1.7.0_12/bin/javac” 1
• sudo update-alternatives –install “/usr/bin/javaws” “javaws” “/usr/local/java/jre1.7.0_12/bin/javaws” 1
• sudo update-alternatives –set java /usr/local/java/jre1.7.0_12/bin/java
• sudo update-alternatives –set javac /usr/local/java/jdk1.7.0_12/bin/javac
• sudo update-alternatives –set javaws /usr/local/java/jre1.7.0_12/bin/javaws
• . /etc/profile

Check installed java version:

• java -version

That’s it, Enjoy!!!