Java Swing is very import when you develop Desktop Applications using Java language for making Graphical User Interfaces. Probably developers use Eclipse for developing Java Applications. However, by default Eclipse doesn't contains Graphical User Interface design tool on it. As a result of that we need to manually add Window Builder to Eclipse.Click links for examples for adding window builder.At the beginning, choose a Eclipse Juno or Eclipse Indigo whatever you like and open Eclipse. Click on the Help toolbar and click on Install New Software.