Java 7 for Absolute Beginners

CHAPTER 12 ■ VIDEO GAMES

import javax.swing.JMenu;

import javax.swing.JMenuBar;

import javax.swing.JMenuItem;

import javax.swing.JOptionPane;

import javax.swing.JPanel;

import javax.swing.Timer;

public class TargetClick implements ActionListener {

// Create the user interface components

private TargetClickPanel targetClickPanel = new TargetClickPanel();

private JPanel scorePanel = new JPanel();

private JLabel timeLabel = new JLabel("Time: ");

private JLabel scoreLabel = new JLabel(" Targets Hit: ");

private JLabel timeDisplayLabel = new JLabel("0");

private JLabel scoreDisplayLabel = new JLabel("0");

private JFrame frame = new JFrame("TargetClick");

// Create the timer, which will manage the game loop

private Timer timer = new Timer(400, this);

// Create some other bits needed by the game logic

static Random random = new Random();

static int score;

private long startTime;

long elapsedTime = 0;

private int gameLength = 50;

// Add a menu, as we've seen before private void addMenu(JFrame frame) {

JMenu file = new JMenu("File");

file.setMnemonic('F');

JMenuItem exitItem = new JMenuItem("Exit");

JMenuItem newGameItem = new JMenuItem("New Game");

JMenuItem gameLengthItem = new JMenuItem("Set Game Length");

exitItem.setMnemonic('x');

exitItem.addActionListener(this);

newGameItem.setMnemonic('n');

newGameItem.addActionListener(this);

gameLengthItem.setMnemonic('s');

gameLengthItem.addActionListener(this);

file.add(exitItem);

file.add(newGameItem);

file.add(gameLengthItem);

JMenuBar menuBar = new JMenuBar();

menuBar.add(file);

frame.setJMenuBar(menuBar);

}

// Display the user interface, as we've seen before

private void createAndShowGUI() {

addMenu(frame);

frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);