Saving through save filechooser

Question

Hi,
I'm having a very strange problem when I try to save a JTree to a file, whos name is specified by the user through a chooser.showSaveDialog. Basically I have a method to save the tree which i used before i introduced the filechooser. The saving was working perfectly without errors. Then as soon as I had the filechooser code, and i try and save, the program just crashes and although a file is created i don't think anything is being saved.
Could someone please help?!
Here is the code with filechooser:
JFileChooser chooser = new JFileChooser(".");
chooser.addChoosableFileFilter(new MyFilter());
int returnVal = chooser.showSaveDialog(this);
File file;
chooser.setDialogTitle("Save As File");
if (returnVal == JFileChooser.APPROVE_OPTION) {
     file = chooser.getSelectedFile();
     String f = file.getName();
     if (file.exists()) {
           returnVal =  JOptionPane.showConfirmDialog(this,
                          "Replace existing file?");
           if (returnVal != JOptionPane.YES_OPTION)
                          return;
     saveTheTree("f + .map");
}the saveTheTree method simply takes the filename to save the map as, and serializes my JTree object, i know this method works because if I try it on it's own the tree will be saved.
Thanks in advance!

Answer 1

I know it's quite late to reply this post. But this is for others from now....
Bellow code returns file name with extension e.g. test.map, abc.txt
String f = file.getName();I think you should not append file extension explicitly like:
saveTheTree(f + ".map");try this instead:
saveTheTree(f);Thanks,
typurohit