easily exploring Java AbstractSyntaxTree

If you ever need to deal with the AST in java here I'd like to this small tool I've found some time ago.

start it with 

java  -cp checkstyle-5.6-all.jar com.puppycrawl.tools.checkstyle.gui.Main PomSourceImporter.java
It shows this file de/lgohlke/sonar/PomSourceImporter

Checkstyle Gui

A nice feature is typing ENTER on an ast node and the corresponding source code will be highlighted as well.
You can get it with checkstyle from checkstyle.sourceforge.net, it is also described here The Checkstyle SDK Gui.

I really appreciated this tool a while ago, when I worked on my thesis and SelectorMethodArgumentCheck.java.

alternativ tools are:

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