Traverse all expanded nodes in tree
import java.util.Enumeration; import javax.swing.JTree; import javax.swing.tree.TreeNode; import javax.swing.tree.TreePath; public class Main { public static void main(String[] argv) throws Exception { JTree tree = new JTree(); visitAllExpandedNodes(tree); } public static void visitAllExpandedNodes(JTree tree) { TreeNode root = (TreeNode) tree.getModel().getRoot(); visitAllExpandedNodes(tree, new TreePath(root)); } public static void visitAllExpandedNodes(JTree tree, TreePath parent) { if (!tree.isVisible(parent)) { return; } TreeNode node = (TreeNode) parent.getLastPathComponent(); System.out.println(node); if (node.getChildCount() >= 0) { for (Enumeration e = node.children(); e.hasMoreElements();) { TreeNode n = (TreeNode) e.nextElement(); TreePath path = parent.pathByAddingChild(n); visitAllExpandedNodes(tree, path); } } } }