How to display tree hierarchy in Java?

Answer 1

Swing has a built-in control for displaying data in a Tree format called JTree. It also provides a data model called DefaultTreeModel which you can use to store the data. This link gives a pretty good explanation of using a JTree with a data model.

[Edit]:

To answer your updated question, a graph like that could quite well be handled by JGraph which would also provide the data model which seems to work similarly to the Tree model swing provides.

Answer 2

For the hierarchy in graphical format, what about a JTree ? http://java.sun.com/docs/books/tutorial/uiswing/components/tree.html

Answer 3

Re Q1: You could find on internet resources several Java implementations of Tree structure, for example this generic tree.

Re Q2: One alternative is using JTree. Check the Java Tutorial trail on How to use Trees

JGraphT could be a good starting point to build something like your example. Check the demo at http://jgrapht.sourceforge.net/visualizations.html

Answer 4

As others have suggested, using JTree is one possible solution. However, if you wish to have more control over the appearance of your tree I suggest checking out the JUNG graphing library. This can potentially give you great results but will require more work.

Answer 5

Prefuse, which is used by Hierarchy (demonstration of trees), is a great tool for displaying (interactive) trees.