鼠标移动事件，eclipse无报错，可是控制台终止程序，没有结果。为什么运行不了的呢？请大神告知！！

[sun_carol]

import java.awt.event.*;
import javax.swing.*;
public class qier extends MouseAdapter implements MouseMotionListener{
JFrame f;
JTextField t;
public void display()
{
f=new JFrame("鼠标事件");
f.setSize(300, 200);
f.setLayout(null);
t=new JTextField(20);
t.setBounds(20, 70, 200, 20);
f.add(t);
f.addMouseMotionListener(this);
f.addMouseListener(this);
}
public static void main(String[] args) {
(new qier()).display();
}
public void mousePressed(MouseEvent e)
{
t.setText("鼠标按下"+e.getPoint());
}
public void mouseReleased(MouseEvent e)
{
t.setText("鼠标释放"+e.getPoint());
}
public void mouseMoved(MouseEvent e)
{
t.setText("鼠标移动"+e.getPoint());
}
public void mouseDragged(MouseEvent e)
{

}
}

[lipengzhu]

在display() 方法中加入 f.setVisible(true);默认窗口是不可见的

[sun_carol]

一时大意，了解了，谢谢！！