// Exercise 15.11: GuessNumber.java
// This game asks the user to guess a number from 1 to 100.
import java.awt.*;
import java.awt.event.*;
import java.util.Random;
import javax.swing.*;
public class GuessNumber extends JFrame
{
// JLabels to display question
private JLabel question1JLabel;
private JLabel question2JLabel;
// JLabel and JTextField to get user guess
private JLabel guessJLabel;
private JTextField guessJTextField;
// JButton to enter guess
private JButton enterJButton;
// JLabel and JTextField to display if user is correct
private JLabel resultJLabel;
private JTextField resultJTextField;
// JButton to start a new game
private JButton newGameJButton;
// no-argument constructor
public GuessNumber()
{
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 question1JLabel
question1JLabel = new JLabel();
question1JLabel.setText(
"I have a number between 1 and 100." );
question1JLabel.setBounds( 40, 10, 216, 34 );
contentPane.add( question1JLabel );
// set up question2JLabel
question2JLabel = new JLabel();
question2JLabel.setText( "Can you guess my number?" );
question2JLabel.setBounds( 40, 24, 216, 34 );
contentPane.add( question2JLabel );
// set up guessJLabel
guessJLabel = new JLabel();
guessJLabel.setText( "Guess:" );
guessJLabel.setBounds( 16, 74, 40, 20 );
contentPane.add( guessJLabel );
// set up guessJTextField
guessJTextField = new JTextField();
guessJTextField.setBounds( 64, 74, 128, 20 );
contentPane.add( guessJTextField );
// set up enterJButton
enterJButton = new JButton();
enterJButton.setText( "Enter" );
enterJButton.setBounds( 208, 74, 96, 21 );
contentPane.add( enterJButton );
enterJButton.addActionListener(
new ActionListener() // anonymous inner class
{
// event handler called when enterJButton is clicked
public void actionPerformed( ActionEvent event )
{
enterJButtonActionPerformed( event );
}
} // end anonymous inner class
); // end call to addActionListener
// set up resultJLabel
resultJLabel = new JLabel();
resultJLabel.setText( "Result:" );
resultJLabel.setBounds( 16, 106, 40, 23 );
contentPane.add( resultJLabel );
// set up resultJTextField
resultJTextField = new JTextField();
resultJTextField.setBounds( 64, 104, 128, 23 );
resultJTextField.setHorizontalAlignment( JTextField.CENTER );
resultJTextField.setEditable( false );
contentPane.add( resultJTextField );
// set up newGameJButton
newGameJButton = new JButton();
newGameJButton.setText( "New Game" );
newGameJButton.setBounds( 208, 106, 96, 21 );
newGameJButton.setEnabled( false );
contentPane.add( newGameJButton );
newGameJButton.addActionListener(
new ActionListener() // anonymous inner class
{
// event handler called when newGameJButton is clicked
public void actionPerformed( ActionEvent event )
{
newGameJButtonActionPerformed( event );
}
} // end anonymous inner class
); // end call to addActionListener
// set properties of application's window
setTitle( "Guess the Number" ); // set title bar string
setSize( 321, 167 ); // set window size
setVisible( true ); // display window
} // end method createUserInterface
// compare guess to answer
private void enterJButtonActionPerformed( ActionEvent event )
{
} // end method enterJButtonActionPerformed
// reset resultJTextField; generate new question
private void newGameJButtonActionPerformed( ActionEvent event )
{
} // end method newGameJButtonActionPerformed
// main method
public static void main( String[] args )
{
GuessNumber application = new GuessNumber();
application.setDefaultCloseOperation( JFrame.EXIT_ON_CLOSE );
} // end method main
} // end class GuessNumber
/**************************************************************************
* (C) Copyright 1992-2004 by Deitel & Associates, Inc. and *
* Pearson Education, Inc. All Rights Reserved. *
* *
* DISCLAIMER: The authors and publisher of this book have used their *
* best efforts in preparing the book. These efforts include the *
* development, research, and testing of the theories and programs *
* to determine their effectiveness. The authors and publisher make *
* no warranty of any kind, expressed or implied, with regard to these *
* programs or to the documentation contained in these books. The authors *
* and publisher shall not be liable in any event for incidental or *
* consequential damages in connection with, or arising out of, the *
* furnishing, performance, or use of these programs. *
**************************************************************************/
