Bug Info:
=========
Changing the popup menu default selection from 0th index to any other index is not working.
For example trying to change the default selection to 2nd index shows both 0th and 2nd index selected but focus on the 0th index.

Check below sample code.

Java Code:
==========
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;

public class PopupMenuTest extends JFrame {

    JPopupMenu popup;
    JPanel panel;
    JTextArea output;
    JScrollPane scrollPane;
    String newline = "\n";
    JMenuItem menuItem1;
    JMenuItem menuItem2;
    JMenuItem menuItem3;


        public PopupMenuTest() {
         try{
              System.out.println("SystemLookAndFeel:"+UIManager.getSystemLookAndFeelClassName());
               panel = new JPanel();
               createPopupMenu();
               this.getContentPane().add(panel,java.awt.BorderLayout.CENTER);
               setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
               Dimension screenSize = java.awt.Toolkit.getDefaultToolkit().getScreenSize();
               this.setBounds((screenSize.width-493)/2, (screenSize.height-388)/2, 493, 388);
               this.setVisible(true);
          }catch(Exception exp_){}
        }

        private void createPopupMenu() {
                //Create the popup menu.
                popup = new JPopupMenu();
                menuItem1 = new JMenuItem("PopupMenuItem 0");
                popup.add(menuItem1);
                menuItem2 = new JMenuItem("PopupMenuItem 1");
                popup.add(menuItem2);
                menuItem3 = new JMenuItem("PopupMenuItem 2");
                popup.add(menuItem3);

        }


        public void testPopupSelected() {
                Point p = this.getLocationOnScreen();
                final int x = p.x-100;
                final int y = p.y-100;

                try {
                                        menuItem3.setArmed(true);
                                        menuItem1.setArmed(false);
                                        menuItem2.setArmed(false);
                                        popup.setSelected(menuItem3.getComponent());
                                        popup.show(this, x, y);
                                        System.out.println(popup.getSelectionModel().getSelectedIndex());
                                        this.repaint();
                }catch(Exception e) {
                        e.printStackTrace();
                }

        }

        public static void main(String [] args){

         PopupMenuTest popmen = new PopupMenuTest();
         popmen.testPopupSelected();


        }
}