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Asked: May 11, 20262026-05-11T03:04:22+00:00 2026-05-11T03:04:22+00:00

With a JTree, assuming the root node is level 0 and there may be

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With a JTree, assuming the root node is level 0 and there may be up to 5 levels below the root, how can I easily expand all the level 1 nodes so that all level 1 & 2 branches and leafs are visible but levels 3 and below aren’t?

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  1. 2026-05-11T03:04:22+00:00Added an answer on May 11, 2026 at 3:04 am

    Thanks for the quick response guys. However I have now found the simple solution I was looking for. For some reason I just couldn’t see DefaultMutableTreeNode.getLevel() in the JavaDocs! FYI what I’m doing now is:

    DefaultMutableTreeNode currentNode = treeTop.getNextNode(); do {     if (currentNode.getLevel() == 1)          myTree.expandPath(new TreePath(currentNode.getPath()));     currentNode = currentNode.getNextNode(); } while (currentNode != null); 
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