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

public class shuffle {

  public shuffle(){
    window.setSize(1100,550);
    window.setLayout(new FlowLayout());
    JLabel cards[] = new JLabel[52];
  int number = 0;
  int [] ranarray = new int[52];
  boolean used[] = new boolean[52] ;

  Random generator = new Random();

  for (int i = 0; i < 52; i++) {
    do { number = generator.nextInt(52); }
      while(!used[number] == false); //while number has been used before try again
        {
           ranarray[i] = number; //unique number? add it to the array
           used[number] = true; //set number to true for comparison
        }
     }

    for (int i = 0; i < 52; i++) {
    cards[ranarray[i]] = new JLabel(new ImageIcon("cards/" + ranarray[i] + ".png")); //display cards
    window.add(cards[ranarray[i]]); //add cards
     }

    //show the window
    window.setVisible(true);

    }

  private JFrame window = new JFrame("Shuffle");

  //open Shuffle
  public static void main(String[] args){
    new shuffle();

  }

}





Copy of code hosted at http://pastie.org/755948

Code saved as Shuffle.java