寻找java错误原因

Question

import java.awt.event.WindowEvent;
import java.awt.event.WindowListener;
import java.awt.*;public class TestFrame  {
Frame f=new Frame();public static void main (String[]args)throws Exception{
new TestFrame().init();
}
public void init()throws Exception{ f.setVisible(true);
f.setSize(300, 300);


f.addWindowListener(new WindowAdapter(){
public void windowClosing(WindowEvent e){
((Window)e.getComponent()).dispose();
}
});
}
}

Answer 1

引入一包试试:
import java.awt.event.WindowAdapter;

Answer 2

import java.awt.event.WindowAdapter;

Answer 3

使用NetBeans软件，再导入import java.awt.event.WindowAdapter包，就可以完成调试

Answer 4

import java.awt.event.*;
import java.awt.*;只要这两个包就行了

Answer 5

import java.awt.event.*;
import java.awt.*;只要这两个包就行了