• Download jdk-6u32-linux-x64.bin(or any version). If you have used 32-bit Ubuntu installation, download jdk-6u32-linux-x32.bin(or any version).
• To make the downloaded bin file executable use the following command.

[code]
chmod +x jdk-6u32-linux-x64.bin
[/code]

• To extract the bin file use the following command.

[code]
./jdk-6u32-linux-x64.bin
[/code]

• Using the following command create a folder called “jvm” inside /usr/lib if it is not already exsted.

[code]
sudo mkdir /usr/lib/jvm
[/code]

• Move the extracted folder into the newly created jvm folder.

[code]
sudo mv jdk1.6.0_32 /usr/lib/jvm/
[/code]

• To install the Java source use following commands.

[code]
sudo update-alternatives –install /usr/bin/javac javac /usr/lib/jvm/jdk1.6.0_32/bin/javac 1
sudo update-alternatives –install /usr/bin/java java /usr/lib/jvm/jdk1.6.0_32/bin/java 1
sudo update-alternatives –install /usr/bin/javaws javaws /usr/lib/jvm/jdk1.6.0_32/bin/javaws 1
[/code]

• To make this default java

[code]
sudo update-alternatives –config javac
sudo update-alternatives –config java
sudo update-alternatives –config javaws
[/code]

• To make symlinks point to the new Java location use the following command

[code]
ls -la /etc/alternatives/java*
[/code]

• To verify Java has installed correctly use this command

[code]
java -version
[/code]