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

 
will zhang
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How to create a graph representing a big tree(parents and children are known)?
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.
 
will zhang
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One of my friend suggest me to use Javascript. Is it necessary?
 
Andre Brito
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I guess not.
The big problem here is to convert from one extension to JPEG, but you can do that just with Java.
 
It is sorta covered in the JavaRanch Style Guide.
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