Copy tree structure to another tree structure

I have a tree, but I want to copy this structure to another structure.
say I got a tree model:
1
2 3
4 5 6
2,3 are the children of 1;
4 is the child of 2; 5,6 are the children of 3.
after I have got this structure, I want to build a tree structure in this way:
object1
object1.add(2),object1.add(3)
object2.add(4)
object3.add(5),object3.add(6);
I want to build a dynamic tree, so i cann't do this, I need a way to build a tree from any tree model into such a tree structure.
thanks!

Hi jiangyubao!
To copy a tree to another tree, each node (obejct) in the tree needs to have a method that can return the children of that node, all the objects one level below this node in the tree. Then you can copy the tree using a loop that looks a little bit like this:
public void copyTree(newTree, oldTree){
TreeNode children[] = oldTree.children();
for(int i=0; i<children.length; i++){
newTree.add(copyNode(children);
public TreeNode copyNode(TreeNode oldNode){
//the call to the constructor of the TreeNode should
// copy the data from the TreeNode passed as argument
TreeNode newNode = new TreeNode(OldNode);
TreeNode children[] = oldNode.children();
for(int i=0; i<children.length; i++){
//call this method again recursively to get down through
// all levels of the tree.
newNode.add(copyNode(children[i]);
And that should be it. Any questions, just fire :-)

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