Aligning the drop-down arrow of a JComboBox to the right

Main.java:

import java.awt.event.*;
import javax.swing.*;
import java.awt.*;
 
public class Main extends JFrame
{
   public Main() {
      this.addWindowListener(new WindowAdapter() {
         public void windowClosing(WindowEvent we) {
            System.exit(0);
         }
      });
 
      getContentPane().setLayout(new FlowLayout(FlowLayout.LEFT));
      Object []items = new Object[] { "one", "two", "three", "four", 
                                      "five", "six", "seven" };
      JComboBox comboBox = new JComboBox(items);
      getContentPane().add(comboBox);
      comboBox.setComponentOrientation(ComponentOrientation.RIGHT_TO_LEFT);
   }
 
   public static void main(String []args) {
      Main main = new Main();
      main.setSize(200, 200);
      main.setVisible(true);
   }
}