import javax.swing.*;
import java.awt.event.*;
public class Block extends JButton implements ActionListener
{
 ImageIcon 翻開時(shí)的圖標(biāo)=null,關(guān)閉時(shí)的圖標(biāo)=null;
 public Block()
  {
    addActionListener(this);
  } 
 public ImageIcon 獲取翻開時(shí)的圖標(biāo)()
  {
    return 翻開時(shí)的圖標(biāo);
  }  
 public ImageIcon 獲取關(guān)閉時(shí)的圖標(biāo)()
  {
    return 關(guān)閉時(shí)的圖標(biāo);
  }  
 public void 設(shè)置翻開時(shí)的圖標(biāo)(ImageIcon icon)
  {
    翻開時(shí)的圖標(biāo)=icon;
  }
 public void 設(shè)置關(guān)閉時(shí)的圖標(biāo)(ImageIcon icon)
  {
    關(guān)閉時(shí)的圖標(biāo)=icon;
  }
 public void 設(shè)置圖標(biāo)(ImageIcon icon)
  {
    setIcon(icon);    
  }
 public void actionPerformed(ActionEvent e)
  {
    this.setIcon(翻開時(shí)的圖標(biāo));
  }
}