/**

 * Picks a card when a button is pressed.

 */

import javax.swing.*;

import java.awt.GridLayout;

import java.awt.BorderLayout;

import java.awt.Color;

import java.awt.event.ActionEvent;

import java.awt.event.ActionListener;





public class PickACard extends JFrame implements ActionListener 

{  

  public PickACard(String title) {

    super(title);   

    setSize(300, 400);

    setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);  

    

    button = new JButton("click to pick card");

    button.addActionListener(this);   

    add(button,BorderLayout.SOUTH);

    

    textArea = new JTextArea();

    textArea.setEditable(true);

    textArea.setBackground(new Color(230,230,230));

    textArea.setLineWrap(true);

    textArea.append("Your cards are:");

    

    add(textArea,BorderLayout.CENTER);

    setVisible(true);

  }

  

  public void actionPerformed(ActionEvent event)

  {   

    int cardIndex = (int) (52*Math.random());

    textArea.append("\n"+cardName(cardIndex));     

  } 

  

  /** Given an index from 0 to 51, determine the name of the card.

    * @param c the card index

    * @return the name of the card

    */

  public String cardName(int c) 

  {

    int suit = c/13;

    int face = c % 13;

    

    String suitName="";

    switch(suit) 

    {

      case 0: suitName="Diamonds"; break;

      case 1: suitName="Hearts"; break;

      case 2: suitName="Clubs"; break;

      case 3: suitName="Spades"; break;

    }

    

    String faceName="";

    if (face == 0) faceName = "Ace";

    else if (face < 10) faceName = ""+(face+1);

    else if (face == 10) faceName = "Jack";

    else if (face == 11) faceName = "Queen";

    else if (face == 12) faceName = "King";

    

    return faceName + " of " + suitName;

  }

  

  

  public static void main(String[] args) { 

    PickACard frame = new PickACard("Pick a Card");   

  }

  

  JTextArea textArea;

  JButton button;

}