JAVA课程设计棒打鼹鼠程序

// Exercise 27.13: WhackAMole.java // This game challenges a player to try to whack the mole. import java.awt.*; import java.awt.event.*; import javax.swing.*; public class WhackAMole extends JFrame { // JButton to start a new game private JButton newGameJButton; // JLabel and JTextField for points private JLabel pointsJLabel; private JTextField pointsJTextField; // JLabel and JTextField for time remaining private JLabel timeJLabel; private JTextField timeJTextField; // counter for moles whacked private int points = 0; // variable to count down the seconds left private int countDown = 30; // Timer for the moles private Timer moleTimer; // Timer for game time private Timer gameTimer; private Mole gameMole; // no-argument constructor public WhackAMole() { gameMole = new Mole(); // declare new Mole object createUserInterface(); } // create and position GUI components; register event handlers private void createUserInterface() { // get content pane for attaching GUI components Container contentPane = getContentPane(); // enable explicit positioning of GUI components contentPane.setLayout( null ); // set up newGameJButton newGameJButton = new JButton(); newGameJButton.setBounds( 100, 8, 125, 23 ); newGameJButton.setText( "New Game" ); contentPane.add ( newGameJButton ); newGameJButton.addActionListener( new ActionListener() // anonymous inner class { // event handler called when newGameJButton is pressed public void actionPerformed( ActionEvent event ) { newGameJButtonActionPerformed( event ); } } // end anonymous inner class ); // end call to addActionListener // set up pointsJLabel pointsJLabel = new JLabel(); pointsJLabel.setBounds( 16, 315, 50, 23 ); pointsJLabel.setText( "Points:" ); contentPane.add( pointsJLabel ); // set up pointsJTextField pointsJTextField = new JTextField(); pointsJTextField.setBounds( 60, 315, 40, 23 ); pointsJTextField.setText( "0" ); pointsJTextField.setHorizontalAlignment( JTextField.RIGHT ); pointsJTextField.setEditable( false ); contentPane.add( pointsJTextField ); // set up timeJLabel timeJLabel = new JLabel(); timeJLabel.setBounds( 130, 315, 100, 23 ); timeJLabel.setText( "Time Remaining:" ); contentPane.add( timeJLabel ); // set up timeJTextField timeJTextField = new JTextField(); timeJTextField.setBounds( 243, 315, 40, 23 ); timeJTextField.setText( "30" ); timeJTextField.setHorizontalAlignment( JTextField.RIGHT ); timeJTextField.setEditable( false ); contentPane.add( timeJTextField ); // set up moleTimer moleTimer = new Timer( 550, new ActionListener() // anonymous inner class { // timer has incremented public void actionPerformed( ActionEvent event ) { moleTimerActionPerformed(); } } // end anonymous inner class ); // end new Timer // set up gameTimer gameTimer = new Timer( 1000, new ActionListener() // anonymous inner class { // timer has incremented public void actionPerformed( ActionEvent event ) { gameTimerActionPerformed(); } } // end anonymous inner class ); // end new Timer addMouseListener( new MouseAdapter() // anonymous inner class { // event handler called when mouse button is pressed public void mousePressed( MouseEvent event ) { whackAMoleMousePressed( event ); } } // end anonymous inner class ); // end call to addMouseListener // set properties of application's window setTitle( "Whack A Mole" ); // set title bar string setSize( 320, 380 ); // set window size setVisible( true ); // display window } // end method createUserInterface // paint the chart public void paint( Graphics g ) { super.paint( g ); // draw vertical chart lines for ( int i = 0; i <= 250; i += 50 ) { g.drawLine( 35 + i, 68, 35 + i, 318 ); } // draw horizontal chart lines for ( int i = 0; i <= 250; i += 50 ) { g.drawLine( 35, 68 + i, 285, 68 + i ); } gameMole.drawMole( g ); } // end method paint // change the position of the mole private void moleTimerActionPerformed() { gameMole.moveMole(); // move the mole to a new hole repaint(); // repaint the JFrame } // end event handler moleTimerActionPerformed // ends the Whack A Mole game if time reaches zero private void gameTimerActionPerformed() { countDown--; // decrement counter // display time remaining timeJTextField.setText( String.valueOf( countDown ) ); // if less than ten seconds are remaining if ( countDown < 10 ) { // change the color of the text in timeJTextField to red timeJTextField.setForeground( Color.RED ); } // when time runs out if ( countDown == 0 ) { // stop timers gameTimer.stop(); moleTimer.stop(); newGameJButton.setEnabled( true ); // enable newGameJButton // reset and hide the mole gameMole.reset(); repaint(); // display score in a JOptionPane JOptionPane.showMessageDialog( this, "Your score is " + points + " points", "Game Over", JOptionPane.INFORMATION_MESSAGE ); } // end if } // end method gameTimerActionPerformed // generate a new Whack A Mole game private void newGameJButtonActionPerformed( ActionEvent event ) { // reset counters points = 0; countDown = 30; // reset JTextFields pointsJTextField.setText( String.valueOf( points ) ); timeJTextField.setForeground( Color.BLACK ); timeJTextField.setText( String.valueOf( countDown ) ); newGameJButton.setEnabled( false ); // disable newGameJButton // start the moleTimer and gameTimer moleTimer.start(); gameTimer.start(); // display first mole gameMole.moveMole(); repaint(); } // end method newGameJButtonActionPerformed // user clicked the mouse button private void whackAMoleMousePressed( MouseEvent event ) { // if mole is hit if ( gameMole.isHit( event.getX(), event.getY() ) ) { points += 50; // add 50 points to the score // display new score pointsJTextField.setText( String.valueOf( points ) ); moleTimer.restart(); // restart the moleTimer // display next mole gameMole.moveMole(); repaint(); } // end if } // end method whackAMoleMousePressed // main method public static void main( String[] args ) { WhackAMole application = new WhackAMole(); application.setDefaultCloseOperation( JFrame.EXIT_ON_CLOSE ); } // end method main } // end class WhackAMole /************************************************************************** * (C) Copyright 1992-2004 by Deitel & Associates, Inc. and * * Pearson Education, Inc. All Rights Reserved. * *