import java.awt.BorderLayout; import javax.swing.JFrame; import javax.swing.JLabel; import javax.swing.JScrollPane; import javax.swing.JTree; import javax.swing.SwingUtilities; import javax.swing.tree.DefaultMutableTreeNode; public class JTreeBug { // related to fix for https://bugs.openjdk.org/browse/JDK-8317771 public static void main(String[] args) { SwingUtilities.invokeLater(() -> { String javaInfo = System.getProperty("os.name") + " " + System.getProperty("os.version") + " (" + System.getProperty("os.arch") + "), " + System.getProperty("java.vm.name") + ", " + System.getProperty("java.vm.version") + ", " + System.getProperty("java.vm.vendor"); System.out.println(javaInfo); DefaultMutableTreeNode rootNode = new DefaultMutableTreeNode("Root"); for(int i = 0; i < 10000; i++) { rootNode.add(new DefaultMutableTreeNode("Child " + i)); } JTree tree = new MyJTree(rootNode); tree.setShowsRootHandles(true); // t.setLargeModel(true); // This makes no difference JFrame frame = new JFrame(); frame.add(new JLabel("- Toggle the handle icon next to 'Root' or double-click it a few times." + "
- you will get a java.lang.NoSuchMethodException"), BorderLayout.NORTH); frame.add(new JScrollPane(tree), BorderLayout.CENTER); frame.add(new JLabel(javaInfo), BorderLayout.SOUTH); frame.setSize(700, 700); frame.setVisible(true); }); } }