java - How to select first item in JPopupMenu? -

In the past, when one made a JPopupMenu Visible This item will be selected by default:

Today, the default behavior is to pop up the menu without any items I will be selecting and pop up centered under a would make JPopupMenu which the mouse pointer with a code. I before has managed to get centered pop up at the bottom of the mouse but i Jemenuitm declined to render the like that has been decided that I move the mouse out of the item and right again From

Any idea

Here's my testcase to choose:.

  Import Java .awt.Component; Import java.awt.Point; Import java.awt.event.ActionEvent; Import java.awt.event.ActionListener; Import java.awt.event.MouseAdapter; Import java.awt.event.MouseEvent; Import javax.swing.JFrame; Import javax.swing.JMenuItem; Import javax.swing.JPopupMenu; Public Test Test Jeffrey {Public Static Expands Zero Main (String [] Args) {JFrame frame = new JFrame (); Frame.setSize (800, 600); . Frame.getContentPane () addMouseListener (New MouseAdapter () {@Override public void mousePressed (MouseEvent e) {if (e.isPopupTrigger ()) popupTriggered (e);} @Override public void mouseReleased (MouseEvent e) {if (e. isPopupTrigger ()) popupTriggered (e);} private void popupTriggered (MouseEvent e) {JPopupMenu menu = new JPopupMenu (); final JMenuItem item = new JMenuItem ( "this is a JMenuItem"); menu.add (item); point point = e.getPoint (); int x = point.x - (item.getPreferredSize () width / 2); int y = point.y - (item.getPreferredSize () height / 2); Menukshow (( Component) e.getSource (), x, y);}}); Frame.setDefaultCloseOperation (JFrame.DISPOSE_ON_CLOSE); Frame.setVisible (true); }}