2015/05/22

import java.awt.*; 
import java.awt.event.*;
import javax.swing.*;
import javax.swing.event.*;
import java.util.Random;

class A3 extends JFrame {

public static void main(String[]args){
new A3();
}

public A3()
{

String s;

JFrame F=new JFrame("A");
F.setDefaultLookAndFeelDecorated(true);
F.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
JPanel P = new JPanel();
P.setLayout(new GridLayout(4,4));
JButton button[]=new JButton[16];

int num[] = new int[16]; 
Random ran = new Random();

for(int i = 0; i < 16; i++){ 
num[i] = i;
}

for(int i = 0; i < 16; i++){
int j,x;
j = ran.nextInt(16);
x = num[i];
num[i] = num[j];
num[j] = x;
}

for (int i = 0; i < 16; i++){ 
button[i] = new JButton();

button[i].addActionListener(new ActionListener() { 
public void actionPerformed(ActionEvent e) {
String s1;
for(int i=0; i <= 15; i++)
{
if(e.getSource() == button[i]){

if(Integer.valueOf(button[i+1].getText())==0)
{
s1=button[i].getText();
button[i].setText(button[i+1].getText());
button[i+1].setText(s1);

}
else if(Integer.valueOf(button[i-1].getText())==0)
{
s1=button[i].getText();
button[i].setText(button[i-1].getText());
button[i-1].setText(s1);

}
else if(Integer.valueOf(button[i+4].getText())==0)
{
s1=button[i].getText();
button[i].setText(button[i+4].getText());
button[i+4].setText(s1);
}
else if(Integer.valueOf(button[i-4].getText())==0 && i>3 && i<15)
{
s1=button[i].getText();
button[i].setText(button[i-4].getText());
button[i-4].setText(s1);
}

//System.out.println(i+button[i].getText());
}
}
}
});

button[i].setSize(50,50);
button[i].setText(Integer.toString(num[i]));

P.add(button[i]);
}
F.getContentPane().add(P,BorderLayout.CENTER);
F.setVisible(true); 
}

}