To install JCreator, first you must install java. Please note the location where Java is placed on your computer, typically C:\Program Files\Java\jdk1.5.0_01. Next head over to www.JCreator.com and click on the Download link. On the download page, select JCreator LE version. The PRO version is $29 for students or you can try the 30 day trial version. The only differences between the two versions are added convenience features (automatic code completion, etc).
One the next page fill in your Name, and Email and click submit. You will receive an email with a link. Click on the link to open the automatic download page. Save the zip file and open it with your favorite unzipping application (winzip, winrar), and run setup.exe.
Just hit next for the first install dialog. Obviously you want to associate JCreator files with JCreator. The next dialog box prompts you to locate java. If you installed java in the default location (C:\Program Files\Java\jdk1.5.0_01), the field should already be filled. Otherwise locate it on your machine. If you downloaded the documentation files from java, hit next to locate them. Otherwise, select Finish.
That's all there is to installing JCreator. If something bad happened while you were setting the locations of java files, or you decided to move java's location on your computer, you can go to the configure menu item while running JCreator and select options. Then Select JDK Profiles. From there hit edit and select the location where you would like JCreator to associate with Java.