DiceGame.java

package name.marcocirillo;

import java.awt.BorderLayout;
import java.awt.GridLayout;
import java.awt.HeadlessException;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.io.IOException;
import java.io.InputStream;

import javax.imageio.ImageIO;
import javax.swing.ImageIcon;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.UIManager;

public class DiceGame extends JFrame {
    
	private static final long serialVersionUID = -4687588888946630999L;
	static ImageIcon[] dice = new ImageIcon[6];
	JLabel[] diceLabel 		= new JLabel[6];
	JButton[] reRoll		= new JButton[6];

	public DiceGame(String title) throws HeadlessException {
		super(title);
		this.setDefaultCloseOperation(DISPOSE_ON_CLOSE);
		
		try {	
		// Set OS look and feel
			UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
		} catch (Exception e) {}
		
		try {
			dice[0] = createIcon("img/dice1.png");
			dice[1] = createIcon("img/dice2.png");
			dice[2]	= createIcon("img/dice3.png");
			dice[3] = createIcon("img/dice4.png");
			dice[4] = createIcon("img/dice5.png");
			dice[5] = createIcon("img/dice6.png");
		} catch (IOException e) {
			System.out.println("Failed to load image.");
			e.printStackTrace();
			System.exit(1);
		}

		GridLayout layout = new GridLayout(1,6);
		JPanel top 		= new JPanel();
		top.setLayout(layout);
		JPanel bottom 	= new JPanel();
		bottom.setLayout(layout);
		
		for (int i = 0; i < diceLabel.length; i++) {
			diceLabel[i] = new JLabel(roll());
			top.add(diceLabel[i]);
		}
		
		for (int i = 0; i < reRoll.length; i++) {
			reRoll[i] = new JButton("Reroll Die");
			reRoll[i].addActionListener(new ActionListener() {

				@Override
				public void actionPerformed(ActionEvent e) {
					JButton source = (JButton) e.getSource();
					
					if (source == reRoll[0]){
						diceLabel[0].setIcon(roll());
					} else if (source == reRoll[1]){
						diceLabel[1].setIcon(roll());
					} else if (source == reRoll[2]){
						diceLabel[2].setIcon(roll());
					} else if (source == reRoll[3]){
						diceLabel[3].setIcon(roll());
					} else if (source == reRoll[4]){
						diceLabel[4].setIcon(roll());
					} else if (source == reRoll[5]){
						diceLabel[5].setIcon(roll());
					}
					
				}
			});
			bottom.add(reRoll[i]);
		}
		
		this.add(top, BorderLayout.NORTH);
		this.add(bottom, BorderLayout.SOUTH);
		this.pack();

	}
	
	public static ImageIcon roll() {
		return dice[(int) (Math.random() * 6)];
	}
	
	public static ImageIcon createIcon(String path) throws IOException {
		ClassLoader classLoader = Thread.currentThread().getContextClassLoader();
		InputStream input = classLoader.getResourceAsStream(path);
		return new ImageIcon(ImageIO.read(input));
	}
	
	/**
	 * @param args
	 */
	public static void main(String[] args) {
		new DiceGame("My Dice Game").setVisible(true);

	}

}