Duplicating a Jtree

Question

I need to create a copy of an already existing tree , created using DefaultMutableTreeNode.[Edit] So, I have tried to assign the existing root node, to another DefaultMutableTreeNode.Ex:

DefaultMutableTreeNode ABC = new DefaultMutableTreeNode(null);
DefaultMutableTreeNode ABCcopy = new DefaultMutableTreeNode(null);
ABCcopy=ABC;

But this didnt give me much results. Please advice.

Answer 1

the easiest way to (deep) copy/clone an object in java is by serializing/deserializing it.

Answer 2

How about

Tree newTree = existingTree.clone() ?

Answer 3

Here is an example:

FileOutputStream fos = null;
ObjectOutputStream out = null;
try {
   fos = new FileOutputStream("somefilename");
   out = new ObjectOutputStream(fos);
   out.writeObject(ABC);
   out.close();
} catch(IOException ex) {
  ex.printStackTrace();
}

FileInputStream fis = null;
ObjectInputStream in = null;
try {
   fis = new FileInputStream("somefilename");
   in = new ObjectInputStream(fis);
   ABCCopy = (DefaultMutableTreeNode)in.readObject();
   in.close();
} catch(IOException ex) {
   ex.printStackTrace();
} catch(ClassNotFoundException ex) {
   ex.printStackTrace();
}

Answer 4

I had written a function to populate a tree beginning with ABC. After which, I gave :

ABCcopy=ABC

And it has worked for me!

Thanks, everyone who contributed here, especially nkr1pt.