问设置JMenu方向RTL

EN

import javax.swing.*;
import java.awt.*;

public class MenuTest extends JFrame{

    public static void display()
    {
        JFrame frame = new JFrame();
        frame.setSize(400,400);
        frame.setLayout(new GridLayout(6,1));
        JMenuBar menuBar = new JMenuBar();
        menuBar.applyComponentOrientation(ComponentOrientation.RIGHT_TO_LEFT);
        JMenu jMenu1 = new JMenu("Menu1");
        jMenu1.setMinimumSize(new Dimension(200, 20));
        jMenu1.setMaximumSize(new Dimension(200, 20));
        jMenu1.setComponentOrientation(ComponentOrientation.RIGHT_TO_LEFT);
        JMenu jMenu2 = new JMenu("Menu2");
        jMenu2.setMinimumSize(new Dimension(200, 20));
        jMenu2.setMaximumSize(new Dimension(200, 20));
        JMenuItem menuItem1 = new JMenuItem("Item1");
        JMenuItem menuItem2 = new JMenuItem("Item2");
        menuItem1.setMinimumSize(new Dimension(200, 20));
        menuItem1.setMaximumSize(new Dimension(200, 20));
        menuItem1.setPreferredSize(new Dimension(200, 20));
        menuItem1.setSize(new Dimension(200, 20));
        menuItem2.setMinimumSize(new Dimension(200, 20));
        menuItem2.setMaximumSize(new Dimension(200, 20));
        menuItem1.setComponentOrientation(ComponentOrientation.RIGHT_TO_LEFT);
        menuItem2.setComponentOrientation(ComponentOrientation.RIGHT_TO_LEFT);
        jMenu1.setHorizontalAlignment(JMenu.TRAILING);
        jMenu1.add(menuItem1);
        jMenu1.add(menuItem2);
        menuBar.add(jMenu1);
        menuBar.add(jMenu2);
        menuBar.setSize(frame.getWidth(), 20);
        frame.add(menuBar);
        frame.setVisible(true);
    }
    public static void main(String[] args)
    {
        EventQueue.invokeLater(
                new Runnable() {
                    @Override
                    public void run() {
                        MenuTest.display();
                    }
                }
         );
    }
}