Event mask : Event « Swing Event « Java Tutorial

1. Java Tutorial
2. Swing Event
3. Event

public void mousePressed(MouseEvent mouseEvent) {
      int modifiers = mouseEvent.getModifiers();
      if ((modifiers & InputEvent.BUTTON2_MASK) == InputEvent.BUTTON2_MASK) {
        System.out.println("Middle button pressed.");
      }
    }

import java.awt.BorderLayout;
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 ButtonSample {
  public static void main(String args[]) {
    JFrame frame = new JFrame("Button Sample");
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    JButton button = new JButton("Select Me");
    // Define MouseListener
    MouseListener mouseListener = new 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();
      }
    };
    // Attach listeners
    button.addMouseListener(mouseListener);
    frame.add(button, BorderLayout.SOUTH);
    frame.setSize(300, 100);
    frame.setVisible(true);
  }
}

15.1.Event
	15.1.1.	In the event model, there are three participants
	15.1.2.	Subclasses of AWTEvent
	15.1.3.	ActionEvent Example with One Button That Demonstrates Sources, Events, and Their Listeners
	15.1.4.	Enabling Other Low-level Events
	15.1.5.	Event mask
	15.1.6.	Managing Listener Lists with AWTEventMulticaster
	15.1.7.	Semantic Events
	15.1.8.	Semantic Event Listeners
	15.1.9.	Managing Listener Lists with EventListenerList
	15.1.10.	Writing a Listener as an Anonymous Class
	15.1.11.	Writing a listener as a nested class
	15.1.12.	Creating a Custom Event
	15.1.13.	Event object has information about an event, that has happened.
	15.1.14.	implements AWTEventListener
	15.1.15.	int java.awt.AWTEvent.getID()
	15.1.16.	Event source and listener
	15.1.17.	Process On Swing Event Thread