?? testmultilistener.java
字號:
import java.awt.*; import java.awt.event.*;
import javax.swing.*;
public class TestMultiListener implements MouseMotionListener,MouseListener {
JFrame f = new JFrame("多重監聽器測試");
JTextField tf = new JTextField(30);
public TestMultiListener(){
f.getContentPane().add(new Label("請按下鼠標左鍵并拖動"), "North");
f.getContentPane().add(tf, "South");
f.getContentPane().setBackground(new Color(120,175,175));
f.addMouseMotionListener(this);
f.addMouseListener(this);
f.setSize(300, 200); f.setVisible(true);
f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); }
public static void main(String args[]) {
TestMultiListener t = new TestMultiListener();
}
public void mouseDragged(MouseEvent e) {
String s = "鼠標拖動到位置(" + e.getX() + "," + e.getY() + ")";
tf.setText(s);}
public void mouseEntered(MouseEvent e) {
String s = "鼠標已進入窗體";
tf.setText(s);}
public void mouseExited(MouseEvent e) {
String s = "鼠標已移出窗體";
tf.setText(s);}
// 未使用的MouseMotionListener和MouseListener接口中的方法,也必須實現
public void mouseMoved(MouseEvent e) { }
public void mousePressed(MouseEvent e) { }
public void mouseClicked(MouseEvent e) { }
public void mouseReleased(MouseEvent e) { }
}
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