import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.*;
public class qipan_cover extends JFrame
{
private static final long serialVersionUID = 1L;
final static int N=3;
static int N2=(int)Math.pow(2,N);
JButton[][] jbt=new JButton[N2][N2];
int m=0,n=0;
Color[] colors={Color.YELLOW,Color.BLUE,Color.GREEN,Color.CYAN,Color.BLACK};
private int tile=0;
public qipan_cover()
{
setLayout(new GridLayout(N2,N2,0,0));
for(int a=0;a<N2;a++)
for(int b=0;b<N2;b++)
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