You can find downloads for this open source project at http://code.google.com/p/visualswing4eclipse/
I have found that a safe installation process is as follows:
0 05-06-09 22:25 plugins/
566664 05-06-09 22:25 plugins/org.dyno.visual.swing_0.9.12.I20090506-2220.jar
54306 05-06-09 22:25 plugins/org.dyno.visual.swing.borders_0.9.12.I20090506-2220.jar
134107 05-06-09 22:25 plugins/org.dyno.visual.swing.grouplayouts_0.9.12.I20090506-2220.jar
35809 05-06-09 22:25 plugins/org.dyno.visual.swing.layouts_0.9.12.I20090506-2220.jar
298220 05-06-09 22:25 plugins/org.dyno.visual.swing.lnfs_0.9.12.I20090506-2220.jar
108231 05-06-09 22:25 plugins/org.dyno.visual.swing.parser_0.9.12.I20090506-2220.jar
171935 05-06-09 22:25 plugins/org.dyno.visual.swing.types_0.9.12.I20090506-2220.jar
450681 05-06-09 22:25 plugins/org.dyno.visual.swing.widgets_0.9.12.I20090506-2220.jar
Simplest instructions are to unzip this zip file onto some new folder on
your desktop and then manually move all of the org.dyno.visual.* JAR file
into the plugins folder where you have installed Eclipse. For me, I
moved these files to "C:\Program Files\Eclipse\plugins".
Now, how will you know when this new plugin is available for use?
Run eclipse and then try to use the plugin. To do this, go to a Java project you have (or create one new) and then within that project, right-click on the project and say you want to create a "new --> Other..." and you will be given a dialog box. Search for the folder "Visual Swing Class" and there will be some sub-options. Choose Panel or Frame and then continue, where you enter in the desired class name (make something up) and you will be presented with the GUI image and a split screen where below is the source code that is being generated.
Done.
heineman@cs.wpi.edu