Install Java in Chrome, Chromium or Firefox in Ubuntu

To enable Java plugin in your Linux browsers, just copy these lines into a script, and run it!

JAVA_HOME=/usr/lib/jvm/jdk1.7.0  or the path where you have installed java

MOZILLA_HOME=~/.mozilla mkdir$MOZILLA_HOME/plugins

For 32-bit systems :

ln -s $JAVA_HOME/jre/lib/i386/libnpjp2.so $MOZILLA_HOME/plugins

For 64-bit systems:

ln -s $JAVA_HOME/jre/lib/amd64/libnpjp2.so $MOZILLA_HOME/plugins

For running a script in linux use following commands:

1. Open terminal.

2. Go to the directory where you have created script. (Note: your file must have extension .sh. For example: file_name.sh )

3. Write following commands:  chmod +x <file_name>.sh

4. Now write ./<file_name>.sh

5. Restart your browser.

Install Oracle Sun JDK in Ubuntu and set JAVA_HOME

To install JDK from Oracle use following steps:

1. Download JDK from Oracle web site:

http://www.oracle.com/technetwork/java/javase/downloads/index.html

2. Extract file will be of .bin format. For example - for 64-bit system we have jdk-6u37-linux-x64.bin.

3. Put this bin file in your home directory.

4. Now need to extract this file to use Java API.

5. Extract BIN file:

• Make BIN file executable using this command: chmod +x jdk***.bin
• For executing use: ./jdk***.bin

6. Same named folder will be created in the same directory.

7. Now need to provide JDK path to JAVA_HOME variable in .bashrc file.

8. Edit .bashrc file in editor use following command:

          gedit .bashrc

9. Now put this code in your .bashrc file:

           export JAVA_HOME=/home/jdk***
           export PATH=$JAVA_HOME/bin:$PATH

10. Save file.

11. To refresh your bash settings write this command and hit enter:

            bash

12. To verify configured JDK path use this command:

            which java

This will display your configured path i.e. /home/jdk***/bin/java