How to get all childs of root node in jtree?

Question

I want to get all child nodes of root node.

ex:

Root
   child1
      child1.child1
   child2
      child2.child1

Now I want to get the two child nodes called "child1" and "child2".

How to do that? Is there any possibilities?

Please help me, Thanks in advance..

Answer 1

Get the root of the tree:

 tree.getModel().getRoot();

then get the number of children of this root node:

 tree.getModel().getChildCount(rootNode)

then go from 0 to the number of children and call

tree.getModel().getChild(rootNode, i)

to get the children of the root node.

Answer 2

If your elements implement the TreeNode interface, you can use the available methods:

• TreeNode#children
• TreeNode#getChildAt
• TreeNode#getChildCount

Otherwise, you can directly query the TreeModel. See the

• TreeModel#getRoot
• TreeModel#getChild

methods