testanonymous.java

来自「java程序」· Java 代码 · 共 37 行

import java.awt.*;
import java.awt.event.*;

public class TestAnonymous {
  private Frame f;
  private TextField tf;

  public TestAnonymous() {
    f = new Frame("Anonymous classes example");
    tf = new TextField(30);
  }

  public void launchFrame() {
    Label label = new Label("Click and drag the mouse");
    // Add components to the frame
    f.add(label, BorderLayout.NORTH);
    f.add(tf, BorderLayout.SOUTH);
    // Add a listener that uses an anonymous class
    f.addMouseMotionListener( new MouseMotionAdapter() {
      public void mouseDragged(MouseEvent e) {
        String s = "Mouse dragging:  X = "+ e.getX()
                    + " Y = " + e.getY();
        tf.setText(s);
      }
    }); // <- note the closing parenthesis
    f.addMouseListener(new MouseClickHandler());
    // Size the frame and make it visible
    f.setSize(300, 200);
    f.setVisible(true);
  }

  public static void main(String args[]) {
    TestAnonymous obj = new TestAnonymous();
    obj.launchFrame();
  }
}