buttonsample.java

来自「The Definitive Guide to Java Swing, Thir」· Java 代码 · 共 63 行

import javax.swing.*;
import java.awt.*;
import java.awt.event.*;

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

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

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

        frame.add(button, BorderLayout.SOUTH);
        frame.setSize(300, 100);
        frame.setVisible(true);
      }
    };
    EventQueue.invokeLater(runner);
  }
}