JOGVIZ

This is a library for visualizing Java object graphs (i.e. in-memory data structures). I wrote it when I was trying to figure out what the AST looked like when working on a javac annotation processing plugin.

There may well be more sophisticated tools for visualizing (and probably browsing) Java object graphs, but this library allows for quick and dirty visualization.

To use it, simply add jogviz.jar to your classpath and invoke:

Grapher.of(obj).graph();

Currently it just prints output to stdout, but some day maybe I'll add fancy graphviz output or something like that.

You can also tell the Grapher to avoid recursing into certain types using the literal method, for example:

Grapher.of(obj).literal(Name.class).literal(Type.class).graph();

Another useful method is filter. Take a look at the Grapher source for enlightening details on its use. It's pretty simple.

You can also see some sample output by invoking:

ant example

This visualizes the javac AST on some sample code.