JAVA编程中的问题 十万火急 ！！！高手帮帮我吧！！！

来源：百度知道 编辑：UC知道 时间：2024/05/25 01:47:18
源程序如下 ：为什么我用Jbuilder2006 调试的时候会出现
no interface expected here at line (29:36);

这是为什么啊？高手帮帮我！！！

package myframe;

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

public class myframe {
public static void main(String[] args) {
Frame f=new Frame();
f.setTitle("my web") ;
f.setSize(400,400) ;
f.setLocation(400,400) ;
f.setBackground(Color.BLUE ) ;
f.setLayout(new GridLayout(3,2));
Button btn1=new Button("north");
Button btn2=new Button("south");
Button btn3=new Button("west");
Button btn4=new Button("east");
Button btn5=new Button("center");
f.add(btn1);
f.add(btn2);
f.add(btn3);
f.add(btn4);
f.add(btn5);
f.setVisible(true);

}
}
class MywindowListener exten

import java.awt.*;
import java.awt.event.*;
public class myframe extends Frame
{
public myframe()
{
this.addWindowListener(new MywindowListener());
Frame f=new Frame();
f.setTitle("my web") ;
f.setSize(400,400) ;
f.setLocation(400,400) ;
f.setBackground(Color.BLUE ) ;
f.setLayout(new GridLayout(3,2));
Button btn1=new Button("north");
Button btn2=new Button("south");
Button btn3=new Button("west");
Button btn4=new Button("east");
Button btn5=new Button("center");
f.add(btn1);
f.add(btn2);
f.add(btn3);
f.add(btn4);
f.add(btn5);
f.setVisible(true);
}
public static void main(String[] args)
{
new myframe();
}

class MywindowListener implements WindowListener {

public void windowActivated(WindowEvent e)
{
System.out.println("