Java Swing How to - Check which mouse button is click on the JButton

Question

We would like to know how to check which mouse button is click on the JButton.
Answer

//  w ww.j  a  va  2 s.c o  m
import java.awt.BorderLayout;
import java.awt.Container;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.InputEvent;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.awt.event.MouseListener;

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");

        ActionListener actionListener = new ActionListener() {
            public void actionPerformed(ActionEvent actionEvent) {
                System.out.println("I was selected.");
            }
        };

        MouseListener mouseListener = new MouseAdapter() {
            public void mousePressed(MouseEvent mouseEvent) {
                int modifiers = mouseEvent.getModifiers();
                if ((modifiers & InputEvent.BUTTON1_MASK) == InputEvent.BUTTON1_MASK) {
                    // Mask may not be set properly prior to Java 2
                    // See SwingUtilities.isLeftMouseButton() for workaround
                    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();
            }
        };

        button.addActionListener(actionListener);
        button.addMouseListener(mouseListener);

        Container contentPane = frame.getContentPane();
        contentPane.add(button, BorderLayout.SOUTH);
        frame.setSize(300, 100);
        frame.setVisible(true);
    }
}