I would like to ask a question on the junior
java not making fun of me
import java.awt.*;
import java.awt.event.*;
public class TestMultiListener implements MouseMotionListener,MouseListener {
Frame f = new Frame("多重监听器测试");
TextField tf = new TextField(30);
public TestMultiListener(){
f.add(new Label("请按下鼠标左键并拖动"), "North");
f.add(tf, "South");
f.setBackground(new Color(120,175,175));
f.addMouseMotionListener(this);
f.addMouseListener(this);
f.setSize(300, 200); f.setVisible(true);
}
public static void main(
String args[]) {
TestMultiListener t = new TestMultiListener();
}
public void mouseDragged(MouseEvent e) {
String s = "鼠标拖动到位置(" + e.getX() + "," + e.getY() + ")";
tf.setText(s);
}
public void mouseEntered(MouseEvent e) {
String s = "鼠标已进入窗体";
tf.setText(s);
}
public void mouseExited(MouseEvent e) {
String s = "鼠标已移出窗体";
tf.setText(s);
}
// 未使用的MouseMotionListener和MouseListener接口中的方法,也必须实现
public void mouseMoved(MouseEvent e) { }
public void mousePressed(MouseEvent e) { }
public void mouseClicked(MouseEvent e) { }
public void mouseReleased(MouseEvent e) { }
}
Here this is what role? how to use it? MouseEvent incident is how to useing "this" came to sniffers?
my english is poor i am chinese. thank you for your answer.waiting on line