Which method cals insertString()

Hey I'm trying to understand this code and I just want to know which method is calling insertString() ? There's something in the background doing it but i don't know what it is. I'm using Eclipse, so if there's an easy way to find out this information please let me know :)
http://www.codeguru.com/java/articles/444.shtml
Thanks

In Eclipse, which I don't use very much, there is a context-sensitive menu (right-click) that allows you to look at various aspects of a members (classes, variables, methods). In the source file editor, move the insertion point in the code to be in your method name. Right click, and select References. It should search for, and find, every class/method that calls your method. There can be more than one. Sometimes, there are too many to examine. Good luck.
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Which method cals insertString()

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