how to create a graph representing a big tree(parents and children are known)

[will zhang]

Thank you so much!
Also, I need to write the graph into a jpg/gif file or display the graph in the web browser.

I got a code from JGraph and can create the graph I want, however, JGraph define the graph as class Gscene instead of Img or BufferedImg or RenderedImg. Therefore, I couldn't use ImageIO.write(image, ext, file) to write the graph into a jpg file.

Thank you!

[Ulf Dittmer]

See Listing 10 here. Is that what you're looking for?