Displaying Random Cards

I need to create a frame that contains three labels
---> Each label should display a card images named 1.png . . . 54.png stored in some directory.
---> All three cards must be distinct and selected randomly!(which i have no idea how to code this)
I tried my best and this is what i. . .i did :-

import javax.swing.*;
import java.awt.*;
public class CardSelector extends JFrame{
	private ImageIcon card = new ImageIcon("c:/book/image/"+(1+(int)(Math.random()*55)));
	public CardSelector(){
		for(int i=0;i<3;i++)
			add(new JLabel(card));
	}
	
	public static void main(String[] args){
		CardSelector frame = new CardSelector();
		
		frame.setTitle("Tic Tac Toe");
		frame.setSize(350, 350);
		frame.setLocationRelativeTo(null);
		frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		frame.setVisible(true);
	}

}