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| 15. 1. 5. 事件掩码 |
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public void mousePressed(MouseEvent mouseEvent) {
int modifiers = mouseEvent.getModifiers();
if ((modifiers & InputEvent.BUTTON2_MASK) == InputEvent.BUTTON2_MASK) {
System.out.println("Middle button pressed.");
}
}
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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);
}
}
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