If you have a 64-bit operating system, you might consider taking advantage of the 64-bit version of Java and Eclipse. Once you have installed the 64-bit Java, you’ll probably go to Eclipse.org to grab a copy of your favorite IDE. But it work right.
You’ll need a 64-bit version of Eclipse to work with your 64-bit version of Java. Make your way to this page to get it. It’ll be next to the Windows (x86_64) listing, probably called eclipse-SDK-3.5.1-win32-x86_64.zip.
Then, after a quick download and unzip, you can run it as you always would.