图像编程问题

[apxar]

import java.awt.*;
import java.awt.event.*;
public class Cardlayoutdemo1 extends Frame implements MouseListener////
{

public Cardlayoutdemo1(String string)
{
super(string);

init();
}


public static void main(String[] args) {

new Cardlayoutdemo1 ("cardlayout");

}
public void init ()
{
setLayout(new BorderLayout());
setSize(400,300);
Panel p=new Panel();
p.setLayout(new FlowLayout());
first.addMouseListener(this);
second.addMouseListener(this);
third.addMouseListener(this);


p.add(first);
p.add(second);
p.add(third);
add("North",p);
cards.setLayout(cl);
cards.add("1",new Button("第1页"));
cards.add("2",new Button("第2页"));
cards.add("3",new Button("第3页"));
add("center",cards);
addWindowListener (new WindowAdapter()
{
public void windowclosing(WindowEvent we)
{

setVisible(false);
dispose();

System.exit(0);



}


});
setVisible(true);
}
public void mouseClicked(MouseEvent evt)
{if(evt.getSource()==first)
{cl.first(cards);


}
else if(evt.getSource()==second)
{cl.first(cards);
cl.next(cards);
}
else
cl.last(cards);

}

public void mouseEntered(MouseEvent arg[])
{}
public void mouseExited(MouseEvent arg[])
{}
public void mousepressed(MouseEvent arg[])
{}
public void mouseRelese(MouseEvent arg[])
{}
private Button first =new Button ("第1页");
private Button second =new Button ("第2页");
private Button third =new Button ("第3页");
private Panel cards=new Panel();
private CardLayout cl=new CardLayout();
// Frame f=new Frame();
}
不能输出结果阿~~求大神帮忙~~~~谢谢了

[qybao]

add("North",p); 改成
add(p, BorderLayout.NORTH);
...
add("center",cards); 改成
add(cards, BorderLayout.CENTER);

另外
public void mouseEntered(MouseEvent arg[]) //参数不是数组，改成MouseEvent arg，以下一样
{}
public void mouseExited(MouseEvent arg[])
{}
public void mousepressed(MouseEvent arg[]) //这里的mousepressed改成mousePressed，注意大小写
{}
public void mouseRelese(MouseEvent arg[]) //这里的mouseRelese改成mouseReleased注意单词拼写
{}

[qybao]

回复了看不到，再发一次

add("North",p); 改成
add(p, BorderLayout.NORTH);
...
add("center",cards); 改成
add(cards, BorderLayout.CENTER);

另外
public void mouseEntered(MouseEvent arg[]) //参数不是数组，改成MouseEvent arg，以下一样
{}
public void mouseExited(MouseEvent arg[])
{}
public void mousepressed(MouseEvent arg[]) //这里的mousepressed改成mousePressed，注意大小写
{}
public void mouseRelese(MouseEvent arg[]) //这里的mouseRelese改成mouseReleased注意单词拼写
{}