incorrect java version in linux

Question

I installed JDK 1.5 on RedHat 5 and set the paths for JAVA_HOME and PATH in bash_profile. But java -version still shows 1.4

Appreciate if anyone have a solution to fix this issue.

Answer 1

The JREs can be managed using the /usr/sbin/alternatives function:

alternatives --config java

...will produce a list similar to:

There are 2 programs which provide 'java'.

  Selection    Command
-----------------------------------------------
   1           /usr/lib/jvm/jre-1.4.2-gcj/bin/java
*+ 2           /usr/lib/jvm/jre-1.6.0-openjdk/bin/java

Enter to keep the current selection[+], or type selection number:

• Follow the instructions to select a different JRE default by entering its Selection number, or press the "Enter" key to exit the prompt.
• The "+", found to the left of the Selection number, indicates which JRE is currently selected.

Repeat for "javac" if you do Java development.