How to program with File Dialog Box.

hi,
Can anybody help me out?. I am writing one Notepad application, there i require OS's SAVE dialog box.Now i am getting the Save Dialog box. But How to save a String that is Where the user types (Like NotePad) to a file. and similarly how get a file and show it in to the TextArea object.
The code is like this.
[here sn is the frame(defined earlier).]
FileDialog fldSave=new FileDialog(sn,"Simple Save DialogBox",FileDialog.SAVE);
fldSave.setVisible(true);

Regards
Prasad

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I am moving this discussion to Java in General(intermediate)
Ajith