Bytecode Visualizer

Inspect, understand and debug Java bytecode, no matter if you have the corresponding source.

Sourcecode Visualizer

Draws a control flow graph alongside of Java source code.

Control Flow Graph Factory

Eclipse plugin for generating, editing and exporting control flow graphs.

First Steps with Bytecode Visualizer

1. Open the Bytecode Visualizer for the first time


Note: You need to do thins in the Navigator View. The Package Explorer View does not show *.class files.

To open the Navigator View, go to

Window > Show View > Navigator

or alternatively

Window > Show View > Other... > General > Navigator

2. Adjust file associations (optional)

There are many situations in which Eclipse opens a *.class file: CTRL-Clicking into a class / method / field without source code, Stepping Into in Debugger, etc. In such situations, Eclipse is using the default editor for the *.class file type.

Bytecode Visualizer is set as default editor for /*.class files during the installation.

If it does not suit your needs, you probably want to change the File Associations in Preferences:

Window > Preferences > General > Editors > File Associations

Change the File Associations

Select the file type *.class and set the editor of your choice as Default.

3. Review and adjust preferences

The behavior of Bytecode Visualizer is adjustable in many respects, such as:

  • where the control flow graph should be displayed: split pane in the editor or separate view
  • displaying/not displaying Line Number Table and Local Variable Table
  • rendering/not rendering try/catch blocks
  • graph colors
  • syntax highlighting
  • which Bytecode Editor's tab should be selected by default: Bytecode or Source code (if available)

Just go to

Window > Preferences > Dr. Garbage > Bytecode Visualizer

and change the settings to suit your needs.