You might be able to get a java developer like bluej or something else. It might not work but hell, its a chance.BlueJ
Unfortunately you also need JDK 5 or 6 not JRE to run it. There is a link to it on bluej's website.
All you have to do is create a project. stick the .java file in the project folder (Created for you by BlueJ) and reopen BlueJ then if you see an orange box with a name on it (doesn't matter whatthe name is) hit Ctrl-K to compile. Hope that helps