Problem with JMenu, JPopupMenu [HELP]

[longtqdayma]

I am having a problem with JPopupMenu.
I create a simple JTree. when the right to display a JPopupMenu of JTree.
When the JPopupMenu is show up again I want to click on a JTree node then takes two clicks of the mouse select the node. If you remove this line "UIManager.setLookAndFeel (UIManager.getSystemLookA ndFeelClassName ());" then click only once.
If you want to use "UIManager.setLookAndFeel (UIManager.getSystemLookA ndFeelClassName ());"
How they must.

import static java.awt.event.InputEvent.CTRL_DOWN_MASK;
import java.awt.*;
import java.awt.event.*;
import java.beans.PropertyChangeEvent;
import java.beans.PropertyChangeListener;

import javax.swing.*;
import javax.swing.tree.*;

public class TreePopup {
	JTree tree = new JTree();
	JPopupMenu popup;

	public TreePopup() {
		popup = new JPopupMenu();
		popup.setInvoker(tree);
		PopupHandler handler = new PopupHandler(tree, popup);
		popup.add(getMenuItem("Add child", handler, 'I'));
		popup.add(getMenuItem("Add sibling", handler, 'M'));
		popup.addSeparator();
		popup.add(new JMenuItem("New"));
		popup.add(new JMenuItem("Open"));
		popup.add(new JMenuItem("Copy"));
		popup.add(new JMenuItem("Cut"));
	}

	private JMenuItem getMenuItem(String s, ActionListener al, char c) {
		JMenuItem menuItem = new JMenuItem(s);
		menuItem.setAccelerator(KeyStroke.getKeyStroke(c, CTRL_DOWN_MASK));
		menuItem.setActionCommand(s.toUpperCase());
		menuItem.addActionListener(al);
		return menuItem;
	}

	private JScrollPane getTreeComponent() {
		tree.add(popup);
		expand(new TreePath(tree.getModel().getRoot()));
		return new JScrollPane(tree);
	}

	@SuppressWarnings("unchecked")
	private void expand(TreePath path) {
		TreeNode node = (TreeNode) path.getLastPathComponent();
		if (node.getChildCount() >= 0) {
			java.util.Enumeration e = node.children();
			while (e.hasMoreElements()) {
				TreeNode n = (TreeNode) e.nextElement();
				expand(path.pathByAddingChild(n));
			}
		}
		tree.expandPath(path);
	}

	public static void main(String[] args) throws ClassNotFoundException,
			InstantiationException, IllegalAccessException,
			UnsupportedLookAndFeelException {
		UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
		TreePopup test = new TreePopup();
		JFrame f = new JFrame();
		f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		f.add(test.getTreeComponent());
		f.setSize(400, 400);
		f.setLocation(200, 200);
		f.setVisible(true);
	}
}

class PopupHandler implements ActionListener {
	JTree tree;
	JPopupMenu popup;
	Point loc;

	public PopupHandler(JTree tree, JPopupMenu popup) {
		this.tree = tree;
		this.popup = popup;
		tree.addMouseListener(ma);
	}

	public void actionPerformed(ActionEvent e) {
		String ac = e.getActionCommand();
		TreePath path = tree.getPathForLocation(loc.x, loc.y);
		// System.out.println("path = " + path);
		// System.out.printf("loc = [%d, %d]%n", loc.x, loc.y);
		if (ac.equals("ADD CHILD"))
			addChild(path);
		if (ac.equals("ADD SIBLING"))
			addSibling(path);
	}

	private void addChild(TreePath path) {
		DefaultMutableTreeNode parent = (DefaultMutableTreeNode) path
				.getLastPathComponent();
		int count = parent.getChildCount();
		DefaultMutableTreeNode child = new DefaultMutableTreeNode("child "
				+ count);
		DefaultTreeModel model = (DefaultTreeModel) tree.getModel();
		model.insertNodeInto(child, parent, count);
	}

	private void addSibling(TreePath path) {
		DefaultMutableTreeNode node = (DefaultMutableTreeNode) path
				.getLastPathComponent();
		DefaultMutableTreeNode parent = (DefaultMutableTreeNode) node
				.getParent();
		int count = parent.getChildCount();
		DefaultMutableTreeNode child = new DefaultMutableTreeNode("child "
				+ count);
		DefaultTreeModel model = (DefaultTreeModel) tree.getModel();
		model.insertNodeInto(child, parent, count);
	}

	private MouseListener ma = new MouseAdapter() {
		private void checkForPopup(MouseEvent e) {
			if (e.isPopupTrigger()) {
				loc = e.getPoint();
				popup.show(tree, loc.x, loc.y);
			}
		}

		public void mousePressed(MouseEvent e) {
			checkForPopup(e);
		}

		public void mouseReleased(MouseEvent e) {
			checkForPopup(e);
		}

		public void mouseClicked(MouseEvent e) {
			checkForPopup(e);
		}
	};
	PropertyChangeListener propertyChangeListener = new PropertyChangeListener() {

		@Override
		public void propertyChange(PropertyChangeEvent evt) {

		}
	};
}

[DarrylBurke]

You have omitted one vital detail: since the problem arises only with the SystemLookAndFeel, you need to tell us what system(s) you have tested this on (Windows/Windows classic/Linux/Mac).

Add a line after setLookAndFeel

System.out.println(UIManager.getLookAndFeel());

Report here what that prints on your system.

db

[longtqdayma]

result line code

 System.out.println(UIManager.getLookAndFeel());

[The Microsoft Windows Look and Feel - com.sun.java.swing.plaf.windows.WindowsLookAndFeel]

Detail

public static void main(String[] args) throws ClassNotFoundException,
			InstantiationException, IllegalAccessException,
			UnsupportedLookAndFeelException {
		System.out.println(UIManager.getLookAndFeel());
		UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
		System.out.println(UIManager.getLookAndFeel());

		//TreePopup test = new TreePopup();
		//JFrame f = new JFrame();
		//f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		//f.add(test.getTreeComponent());
		//f.setSize(400, 400);
		//f.setLocation(200, 200);
		//f.setVisible(true);
	}
RESUTL 
[The Java(tm) Look and Feel - javax.swing.plaf.metal.MetalLookAndFeel]
[The Microsoft Windows Look and Feel - com.sun.java.swing.plaf.windows.WindowsLookAndFeel]

thank