Ex :- If you need to run JAVA6 and JAVA8 both from terminal, you have to add java6 and java8 commands to /usr/bin for terminal execution.
Steps to keep java6 and java8.
- Create two files in /usr/bin/ as java6 and java8
- Extract JAVA6 and JAVA8 to Linux file system. Suppose directory locations are /usr/java6/ and /usr/java8/
- Create Soft links for java6 and java8 using the following commands as root.
ln -s /usr/java8/jdk1.6.0_10/bin/java /usr/bin/java6
ln -s /usr/java8/jdk1.8.0_12/bin/java /usr/bin/java8
Now check versions using following commands in terminal.