View Full Version : [other] JDK downgrade

May 8th, 2009, 02:04 PM
I'm completely new to Linux so please bare with me if this has been previously covered.

I have an application which has been developed in a UNIX environment, which one I'm not sure, and programmed using java version 1.5.

I have Ubuntu 8.10 and installed jdk using sudo apt-get install ubuntu-restricted-extras.

This has installed OPENjdk version 1.6

When I tried to compile the program I am getting 70 compile time warnings.

I have compiled the program in Windows and I don't get these warnings, as I am using java version 1.5.

How can I downgrade my java version?

May 8th, 2009, 04:27 PM
One way is go into System -> Administration -> Synaptic and Search for java. Then, remove the version that you don't want and install the one you want.

May 8th, 2009, 05:27 PM
Thanks taurus.
I have gone through that, and installed sun-java5-jdk and have removed open-jdk.

I am still on:
java -version
java version "1.6.0_0"
IcedTea6 1.3.1 (6b12-0ubuntu6.4) Runtime Environment (build 1.6.0_0-b12)
OpenJDK Client VM (build 1.6.0_0-b12, mixed mode, sharing)

If I removed OpenJDK how does it still show up?

May 8th, 2009, 08:07 PM
Reboot and see which version you are running then.

java -version
Otherwise, see if the one you just installed is on the list.

sudo update-alternatives --config java

May 8th, 2009, 09:00 PM

That's done it.

Thanks for the help.