Install Sun JDK 6-7

Ubuntu GNU/Linux 12.04 lts (precise pangolin) released. I wanted to manually install the Sun JDK 6 and 7 on Ubuntu.

Installing Sun JDK 6 on Ubuntu 12.04:

• Download the Sun JDK 6 Bin
  From here.

• Make the BIN file executeable:

chmod +x jdk-6u32-linux-x64.bin

• Extract the BIN file:

./jdk-6u32-linux-x64.bin

• Move extracted folder to this location:

sudo mv jdk1.6.0_32 /usr/lib/jvm/

• Install new Java source in system:

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

• Choose Default Java:

sudo update-alternatives --config javacsudo update-alternatives --config javasudo update-alternatives --config javaws

• Java version test:

java -version

• Verify the symlinks all point to the new Java location:

ls -la /etc/alternatives/java*

• Enable Java Plugin for Mozilla Firefox (even for chrome)

#for 64-Bit jdksudo ln -s /usr/lib/jvm/jdk1.6.0_32/jre/lib/amd64/libnpjp2.so /usr/lib/mozilla/plugins#for 32-Bit jdksudo ln -s /usr/lib/jvm/jdk1.6.0_32/jre/lib/i386/libnpjp2.so /usr/lib/mozilla/plugins

Installing Sun JDK 7 on Ubuntu 12.04:

• Download the Sun JDK 7 tar file
  From here
• Extract the tar file:

tar -xvzf jdk-7u4-linux-x64.tar.gz

• Move extracted folder to this location:

sudo mv jdk1.7.0_04 /usr/lib/jvm/

• Install new Java source in system:

sudo update-alternatives --install /usr/bin/javac javac /usr/lib/jvm/jdk1.7.0_04/bin/javac 1sudo update-alternatives --install /usr/bin/java java /usr/lib/jvm/jdk1.7.0_04/bin/java 1sudo update-alternatives --install /usr/bin/javaws javaws /usr/lib/jvm/jdk1.7.0_04/bin/javaws 1

• Choose Default Java:

sudo update-alternatives --config javacsudo update-alternatives --config javasudo update-alternatives --config javaws

• Java version test:

java -version

• Verify the symlinks all point to the new Java location:

ls -la /etc/alternatives/java*

• Enable Java Plugin for Mozilla Firefox (even for chrome)

#for 64-Bit jdksudo ln -s /usr/lib/jvm/jdk1.7.0_04/jre/lib/amd64/libnpjp2.so /usr/lib/mozilla/plugins#for 32-Bit jdksudo ln -s /usr/lib/jvm/jdk1.7.0_04/jre/lib/i386/libnpjp2.so /usr/lib/mozilla/plugins

Update:I have added Java Web Start configuration (Thanks Jack ).

Update:I have added Java Plugin configuration for Mozilla Firefox even for chrome (thanks
Shetty).

Update:Java_home configuration: some tools require java_home variable. You can set java_home in Ubuntu so simple: edit the file
. BashrcUnder your home directory and add the following lines: (if. bashrc is hidden click in Nautilus menu View> show hidden files)

export JAVA_HOME=/path/your/jdkexport PATH=$JAVA_HOME/bin:$PATH