You can use Synaptic or the command line. ![]() If it’s something else, you’re on your own, but I hope this post provides some tips that will help you on your journey. ![]() If it’s a version from Sun you will see “Java HotSpot (TM)” in the output. If it’s the stock Ubuntu version, the output will contain “GCJ” or such. ![]() If there is a Java on my computer, which version is it? If it prints nothing then you can proceed directly to the install step. If it prints out the name of a file then you have a Java installed. To see if you have Java at hand, open a terminal and run this command: One is enough, so if you have a version other than what you need on hand, you need to remove it before installing the one you want. I ran into a few problems before I finally got Sun’s JRE installed, enough so that I will describe that experience in a separate post.įor now I’ll just describe one approach that finally worked, the key idea being you don’t want to have two different Java’s on your system. JUploadr requires “a version of Sun’s JRE version 1.4.x or later.” I recently wanted to run one such application, jUploadr, and I’m writing this note on how to install other Java implementations. However, some applications require other versions of Java. Ubuntu 7.04 supports Java and by default uses the free software “gj” compiler and runtimes.
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