JarBuilder is a useful tool for Java programmers. It allows one to easily create jar files. It is written in Java providing a nice Swing GUI. Although JarBuilder isn't programmed as a classic wizard, java programmers are able to build their own jar files with JarBuilder in three steps: First you selected the files you want to include into the jar file, then you can load or write your manifest file. at least JarBuilder can do an automatic search for main classes for you and add the correct statement into the manifest file. finally you select the compression level of the jar file and then JarBuilder creates the file for you.