Hi all,
I had posted my code and updated it a few times in another thread and didn't get any response and since I have gotten some things figured out and had posted my long code a few times in the other thread, I thought I would put my last couple questions in a new thread. So anyway, this program generates a random number and the user tries to guess it. After the very first guess, the background should turn red with a message saying that you're getting warmer and any other time you're getting warmer or colder (blue background for colder). Well, it usually turns red after the first guess but sometimes it turns blue after the first guess and I can't figure out how to make sure it turns red after the first guess every time.
The other thing I want to change is, after the user enters a guess, I want the the JTextField to clear itself so that for the next guess, the user doesn't have to backspace to enter a new guess. I feel like I have tried everything but I know I must be missing something. Can anyone give me some advice here on how to fix these two things? Here's my code:
import java.awt.Color;
import java.awt.FlowLayout;
import java.awt.Graphics;
import java.awt.event.ActionListener;
import java.awt.event.ActionEvent;
import java.util.Random;
import javax.swing.JFrame;
import javax.swing.JTextField;
import javax.swing.JLabel;
import javax.swing.JButton;
import javax.swing.SwingUtilities;
public class GuessNumber extends JFrame
{
private int Guesses = 0;
private int GuessOld = 0;
private int number; // application's number
private JTextField guessInputJTextField; // user input field
private JLabel prompt1JLabel; // first line of instruction
private JLabel prompt2JLabel; // second line of instructions
private JLabel messageJLabel; // displays message of game status
private JLabel message2JLabel; //display number of guesses
private JLabel message3JLabel;
private JLabel random1 = new JLabel("");
private JButton newGameJButton; // creates new game
private Color background; // background color of application
// set up GUI and initialize values
public GuessNumber()
{
super("Guessing Game");
setLayout(new FlowLayout());
background = Color.LIGHT_GRAY; // set background to light gray
prompt1JLabel = new JLabel("I have a number between 1 and 1000."); // describe game
add(prompt1JLabel);
prompt2JLabel = new JLabel("Can you guess my number? Type your Guess and then press 'Enter':"); // prompt user
add(prompt2JLabel);
guessInputJTextField = new JTextField(5); // to enter guesses
guessInputJTextField.addActionListener(new GuessHandler());
add(guessInputJTextField);
messageJLabel = new JLabel("");
add(messageJLabel);
message2JLabel = new JLabel ("");
add (message2JLabel);
message3JLabel = new JLabel ("");
add (message3JLabel);
newGameJButton = new JButton("New Game"); // create "New Game" button
add(newGameJButton); // add newGame button to JFrame
Random generator = new Random();
number = generator.nextInt(1001);//create random number
newGameJButton.addActionListener(new ActionListener() // anonymous inner class
{
public void actionPerformed(ActionEvent e)
{
theGame ();
} // end method actionPerformed
} // end anonymous inner class
); // end call to addActionListener
theGame(); // start new game
} // end GuessGameFrame constructor
// choose a new random number
public void theGame()
{
guessInputJTextField.setText("");
Random generator = new Random();
number = generator.nextInt(1001);
random1.setText("" + number);
SwingUtilities.updateComponentTreeUI(random1);
messageJLabel.setText("");
guessInputJTextField.setEditable(true);
message2JLabel.setText("");
Guesses = 0;
message3JLabel.setText("Enter guess # " + Integer.toString(++Guesses));
getContentPane().setBackground(Color.LIGHT_GRAY);
} // end method theGame
// change background color
class GuessHandler implements ActionListener
{
public void actionPerformed(ActionEvent e)
{
int Guess;
Guess = Integer.parseInt(guessInputJTextField.getText());
SwingUtilities.updateComponentTreeUI(guessInputJTextField);
if (Math.abs(number - Guess) < Math.abs(number - GuessOld))
{
// Hotter
getContentPane().setBackground(Color.RED);
message2JLabel.setText("You're getting warmer!");
SwingUtilities.updateComponentTreeUI(message2JLabel);
}
if (Math.abs(number - Guess) > Math.abs(number - GuessOld))
{
// Colder
message2JLabel.setText("You're getting colder!");
SwingUtilities.updateComponentTreeUI(message2JLabel);
getContentPane().setBackground(Color.BLUE);
}
GuessOld = Guess;
if (Guess > number)
{
messageJLabel.setText(+ Guess + " is too high.");
SwingUtilities.updateComponentTreeUI(messageJLabel);
}
if (Guess < number)
{
messageJLabel.setText(+ Guess + " is too low.");
SwingUtilities.updateComponentTreeUI(messageJLabel);
}// end if
Guesses++;
message3JLabel.setText("Enter guess # " + Integer.toString(Guesses));
if (Guess == number)
{
messageJLabel.setText("Congratulations! You guessed my number!");
getContentPane().setBackground(Color.YELLOW);
message2JLabel.setText("");
SwingUtilities.updateComponentTreeUI(messageJLabel);
Guesses++;
message3JLabel.setText("# of guesses = " + Integer.toString(Guesses));
SwingUtilities.updateComponentTreeUI(message3JLabel);
guessInputJTextField.setEditable(false);
}
}
}
}import javax.swing.JFrame;
public class GameGuessNumber
{
public static void main(String args[]) throws Exception
{
GuessNumber game = new GuessNumber();
game.setDefaultCloseOperation( JFrame.EXIT_ON_CLOSE );
game.setSize(550, 150);
game.setVisible(true);
}
}