Generating the interaction diagrams from java

Hi All,
I am making a program, in which I should be able to push in a bean and when I perform some operation on that bean I should be able to generate the list of all the classes which were used for that purpose. It is something like generating the interaction diagram. Can somebody let me know how it can be done?
Thanking in advance,
Amit

Well you can use a tool like together from http://www.togethersoft.com if you can stand it's bulk, slowness and multitude of half implemented features.
It's actually quite good at drawing interaction diagrams as long as the task is simple.
If you want your own program to collect the calling information, then consider having the various methods all add a token to a public static list shared by the whole system. Then after the method call has been made the list will have one token for each method call made, ordered the way they were made. Each token corresponds to a horizontal arrow on your diagram.

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