Java AWT InputEvent check mouse button

import java.awt.BorderLayout;
import java.awt.event.InputEvent;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;

import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.SwingUtilities;

public class Main {
   public static void main(String args[]) {
      JFrame frame = new JFrame("Button Sample");
      frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
      JButton button = new JButton("Select Me");

      // Attach listeners
      button.addMouseListener(new My());
      frame.add(button, BorderLayout.SOUTH);
      frame.setSize(300, 100);/*  www . j  a v  a2s  . co m*/
      frame.setVisible(true);
   }
}
class My extends MouseAdapter {
   public void mousePressed(MouseEvent mouseEvent) {
      int modifiers = mouseEvent.getModifiers();
      if ((modifiers & InputEvent.BUTTON1_MASK) == InputEvent.BUTTON1_MASK) {
         System.out.println("Left button pressed.");
      }
      if ((modifiers & InputEvent.BUTTON2_MASK) == InputEvent.BUTTON2_MASK) {
         System.out.println("Middle button pressed.");
      }
      if ((modifiers & InputEvent.BUTTON3_MASK) == InputEvent.BUTTON3_MASK) {
         System.out.println("Right button pressed.");
      }
   }
   public void mouseReleased(MouseEvent mouseEvent) {
      if (SwingUtilities.isLeftMouseButton(mouseEvent)) {
         System.out.println("Left button released.");
      }
      if (SwingUtilities.isMiddleMouseButton(mouseEvent)) {
         System.out.println("Middle button released.");
      }
      if (SwingUtilities.isRightMouseButton(mouseEvent)) {
         System.out.println("Right button released.");
      }
      System.out.println();
   }
}