Search JTree for a node

Question

Hi everyone,
Lets say I have a JTree such as:
Root
-Child1
--Child1_1
-Child2
Now is there a method which given the name of a node, eg. Child1_1 can go and get that node? By get i mean i have the above tree then i say:
currentNode = Child1_1;
tree.getNode(currentNode);
I know there are methods that can do this if the node has been selected but in my case it has to be done without the node being selected.
Hope i've made it clear!
Thanks.

Answer 1

Hello.
There is no such built-in method because it all depends on what kind of node you use. The String (name) representing a node is really a rendering thing.
Assuming you're using a DefaultTreeModel with DefaultMutableTreeNodes :public static TreeNode findNode(JTree aTree, Object aUserObject) {
     if (aTree == null) throw new IllegalArgumentException("Passed tree is null");
     if (aUserObject == null) throw new IllegalArgumentException("Passed user object is null");
     DefaultMutableTreeNode node = (DefaultMutableTreeNode)aTree.getModel().getRoot();
     return findNodeImpl(node, aUserObject);
private static DefaultMutableTreeNode findNodeImpl(DefaultMutableTreeNode aNode, Object aUserObject) {
     if (aNode.getUserObject().equals(aUserObject)) return aNode;
     int childCount = aNode.getChildCount();
     for (int i = 0; i < childCount; i++) {
          DefaultMutableTreeNode child = (DefaultMutableTreeNode)aNode.getChildAt(i);
          DefaultMutableTreeNode result = findNodeImpl(child, aUserObject);
          if (result != null) return result;
     return null;
}