Read the DefaultMutableTreeNode(applet) and write to file

[kwangming]

HI all,
   may I know how to search the whole tree and write it as a file?
   for example, my tree is like this,

a
b
c
-->c.1
-->c.2
---->c.2.1
---->c.2.2
d
e

I need to write it to a text file like this,

1) a
2) b
3) c
    c.1
    c.2
      c.2.1
      c.2.2
4) d
5) e

thanks.

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