Secret Letter

[none_none]

Thanks for the help!

[trixma]

This sounds a bit like an assignment to me. We can help you, but we cant do it for you, we havent got the time, paste what you have and ill have a look at it

[sjalle]

This one makes it in 4 guesses it seems.... (I still can' tfind my glasses though). This is a hybrid applet, it can run as an application and
as an applet without any modification.

import java.awt.*;
import java.awt.event.*;
import java.applet.*;
import javax.swing.*;

/**
 * A Guess-A-Letter applet
 */

public class GuessApplet extends Applet implements ActionListener {
  private boolean isStandalone = false;
  private static char [] chars={
    'a','b','c','d','e','f','g','h','i','j','k','l','m','n',
    'o','p','q','r','s','t','u','v','w','x','y','z'
  };
  private int currHi=chars.length;
  private int currLow=0;
  private int guessCount=0;
  JLabel guessCountLbl = new JLabel();
  JTextField secretLetterTF = new JTextField();
  JLabel jLabel1 = new JLabel();
  JButton guessBtn = new JButton();
  JLabel guessLbl = new JLabel();
  JRadioButton lowRB = new JRadioButton();
  JRadioButton hiRB = new JRadioButton();
  ButtonGroup loHiRBGroup = new ButtonGroup();

  //Construct the applet
  public GuessApplet() {
  }
  //Initialize the applet
  public void init() {
    try {
      jbInit();
      guessBtn.addActionListener(this); // 'hook up' the guess btn
      guessCount=0;
    }
    catch(Exception e) {
      e.printStackTrace();
    }
  }
  //Component initialization
  private void jbInit() throws Exception {
    guessCountLbl.setText("Number of guesses: 0");
    secretLetterTF.setText("");
    secretLetterTF.setColumns(5);
    jLabel1.setText("Enter Secret Letter");
    guessBtn.setText("Guess");
    guessLbl.setBorder(BorderFactory.createLineBorder(Color.black));
    guessLbl.setPreferredSize(new Dimension(40, 22));
    guessLbl.setHorizontalAlignment(SwingConstants.CENTER);
    guessLbl.setText("");
    lowRB.setMinimumSize(new Dimension(49, 25));
    lowRB.setText("Low");
    hiRB.setText("Hi");
    this.add(jLabel1, null);
    this.add(secretLetterTF, null);
    this.add(guessBtn, null);
    this.add(guessLbl, null);
    this.add(guessCountLbl, null);
    this.add(lowRB, null);
    this.add(hiRB, null);
    loHiRBGroup.add(lowRB);
    loHiRBGroup.add(hiRB);

  }
  //Start the applet
  public void start() {}
  //Stop the applet
  public void stop() {}
  //Destroy the applet
  public void destroy() {}
  //Get Applet information
  public String getAppletInfo() {
    return "The guessALetter Applet";
  }

  /**
   * Handle callback from the guess btn
   * @param e
   */
  public void actionPerformed(ActionEvent e) {
    char guessChar;
    String s=secretLetterTF.getText().trim();
    if (s.length()==0) return; // bad entry....
    if (guessCount==0) {
      guessChar=getGuessChar();
      this.guessLbl.setText(Character.toString(guessChar));
    } else {
      char c = (char) s.getBytes()[0];
      guessChar = getGuessChar();
      this.guessLbl.setText(Character.toString(guessChar));
      if (c == guessChar) {
        guessCountLbl.setText("Correct, " + guessCount + " guesses");
        return;
      }
    }
    guessCount++;
    guessCountLbl.setText("Number of guesses: " + guessCount);
  }
  /**
   * Do a binary lookup
   * @return
   */
  private char getGuessChar() {
    int low=0;
    int hi=chars.length;
    if (lowRB.isSelected()) {
      low=currLow;
      hi=getMiddle(currLow,currHi);
    } else if (hiRB.isSelected()) {
      low=getMiddle(currLow,currHi);
      hi=currHi;
    }
    int guessPos=getMiddle(low,hi)-1;
    currHi=hi;
    currLow=low;
    System.out.println(currHi+" "+currLow);
    return chars[guessPos];
  }
  private int getMiddle(int a, int b) {
    return (int)(((double)(a+b))/2.0 +0.5);
  }

  //Main method
  public static void main(String[] args) {
    GuessApplet applet = new GuessApplet();
    applet.isStandalone = true;
    Frame frame;
    frame = new Frame();
    frame.setTitle("Applet Frame");
    frame.add(applet, BorderLayout.CENTER);
    applet.init();
    applet.start();
    frame.setSize(400,320);
    Dimension d = Toolkit.getDefaultToolkit().getScreenSize();
    frame.setLocation((d.width - frame.getSize().width) / 2, (d.height - frame.getSize().height) / 2);
    frame.setVisible(true);
  }

}

[none_none]

Thank you for the help. I really appreciate it much. I know that what you gave me is not complete but it's a way for me to understand the problem completely. Thanks once more.