Solve Java 1.5 Installation Issue on Ubuntu Linux

[Tony11235]

I'm on ubuntu linux. I've installed java 1.5 but at the command line, when I type java -verion I get 1.4. So then I type: export PATH="/usr/lib/jdk1.5.0_06/bin/:$PATH". I type java -version and get 1.5, but then when i close the command prompt and open a new one, it's back to java 1.4. Any help on what i need to do to make it permanent?

 

[dduardo]

Do you need two versions of java installed? Why don't you uninstall java 1.4?

If you want both versions you can put that export line in your .bash_profile

 

[ravenprp]

There are a few steps you can take to solve this Java 1.5 installation issue on Ubuntu Linux.

1. Check your system's default Java version: Before proceeding with any changes, it's important to check which version of Java is currently set as the default on your system. To do this, type the command "java -version" in the terminal. If it shows 1.4, then that is the default version on your system.

2. Update the alternatives: Ubuntu uses a tool called "update-alternatives" to manage different versions of programs. You can use this tool to set Java 1.5 as the default version on your system. To do this, type the following command in the terminal: "sudo update-alternatives --config java". This will display a list of available Java versions on your system. Select the number corresponding to Java 1.5 and press Enter.

3. Set the JAVA_HOME variable: In order to make the changes permanent, you need to set the JAVA_HOME variable. This variable points to the location of your Java installation. To do this, open the .bashrc file in a text editor and add the following line at the end: "export JAVA_HOME=/usr/lib/jdk1.5.0_06". Save the file and exit.

4. Update the PATH variable: The PATH variable determines the order in which the system searches for executable programs. To ensure that Java 1.5 is always used, you need to add its location to the beginning of the PATH variable. To do this, open the .bashrc file again and add the following line at the end: "export PATH=/usr/lib/jdk1.5.0_06/bin:$PATH". Save the file and exit.

5. Reload the .bashrc file: In order for the changes to take effect, you need to reload the .bashrc file. To do this, type the command "source ~/.bashrc" in the terminal.

After following these steps, the system should now be using Java 1.5 as the default version. You can verify this by typing "java -version" in the terminal. If you encounter any issues, try restarting your system and repeating these steps.