Thread: Hangman game HELP!

I've been trying to make a hangman game for a high school project but lack of experience and skills prevents me from getting it to work This is probably easy for you all but i really need this help bec i dont know whats wrong with my code.

Menu:

package hangnerd;
import javax.swing.*;
 
/**
 *
 * @author Jonathan
 */
public class GameMenu {
HangGame hg = new HangGame();
    /**
     * @param args the command line arguments
     */
    public static void main(String[] args) {
        GameMenu gameMenu = new GameMenu();
 
    }
 
    public GameMenu()
    {
        char opt =' ';
        do
        {
            menu();
            String choice = JOptionPane.showInputDialog("Enter an option");
            opt = choice.toUpperCase().charAt(0);
            options(opt);
 
        }
        while (opt != 'Q');
 
    }
   final void menu()
    {
        System.out.println("A. Play Game");
        System.out.println("Q. Quit");
 
    }
 void options(char opt)
    {
    switch(opt)
    {
        case 'A':hg.PlayGame();
        break;
 
    }
}
}

Second class

package hangnerd;
import java.util.*;
import java.io.*;
/**
*
* @author Jonathan
*/
public class WrdArray {
WrdObj[] wordArr = new WrdObj[200];
int count = 0;
public void FileToArray() throws IOException
{
try{
BufferedReader fr = new BufferedReader(new FileReader("Words.txt"));
String line = fr.readLine();
while(line != null)
{
 
StringTokenizer stk = new StringTokenizer(line,"#");
String word = stk.nextToken();
String hint = stk.nextToken();
wordArr[count] = new WrdObj(word,hint);
count++;
line = fr.readLine();
}
 
} catch (FileNotFoundException fnfe)
{
    System.out.println("File not found");
}
}
public String RandomWrdGen()
{
int pos = (int) (Math.random()*count);
String gameWrd = wordArr[pos].toString();
return gameWrd;
}
public void Display()
{
System.out.println("URarray=" + Arrays.toString(wordArr));
}
 
 
public String toString()
{
String temp = "";
for (int i = 0; i < count; i++)
{
temp += wordArr[i]+"\n";
}
return temp;
}
}

thrid class

package hangnerd;
 
/**
 *
 * @author Jonathan
 */
public class WrdObj {
private String word;
private String hint;
 
public WrdObj()
{
 
}
 
public WrdObj (String w,String h)
    {
    word = w;
    hint = h;
}
 
public String getWord()
    {
    return word;
}
public String getHint()
    {
    return hint;
}
 
public void setWord(String w)
    {
    word = w;
}
 
public void setHint(String h)
    {
    hint = h;
}
 
public String toString()
    {
    String temp;
    temp = word + " " + hint;
    return temp;
}
}

fourth class

package hangnerd;
import javax.swing.*;
/**
 *
 * @author Jonathan
 */
public class HangGame {
WrdArray wrd = new WrdArray();
        public void PlayGame()
    {
            String gWrd = wrd.RandomWrdGen();
        char newwrd[] = new char [100];
        for (int i = 0 ; i < gWrd.length () ; i++)
        {
            newwrd [i] = '-';
        }
        System.out.println (newwrd);
        int error = 0;
        int correct = 0;
        while (error != 5 && correct != gWrd.length ())
        {
            boolean flag = false;
            char guess = JOptionPane.showInputDialog ("Guess a letter").charAt (0);
            for (int o = 0 ; o < gWrd.length () ; o++)
            {
                if (guess == gWrd.charAt (o))
                {
                    newwrd [o] = guess;
                    correct++;
                    flag = true;
                }
            }
            if (flag == false)
            {
                error++;
            }
            System.out.println (newwrd);
        }
        if (correct == gWrd.length ())
        {
            JOptionPane.showMessageDialog (null, "You win!");
        }
        else
        {
            JOptionPane.showMessageDialog (null, "You lose!");
        }
    }
 
 
    }

It will compile and I will get the chance to type in an option for my menu but after I input the letter A I get this message. When I input Q that part works.
These are the errors:

Originally Posted by output

run:
A. Play Game
Q. Quit
Exception in thread "main" java.lang.NullPointerException
at hangnerd.WrdArray.RandomWrdGen(WrdArray.java:41)
at hangnerd.HangGame.PlayGame(HangGame.java:16)
at hangnerd.GameMenu.options(GameMenu.java:47)
at hangnerd.GameMenu.<init>(GameMenu.java:31)
at hangnerd.GameMenu.main(GameMenu.java:19)
Java Result: 1
BUILD SUCCESSFUL (total time: 4 seconds)

at hangnerd.WrdArray.RandomWrdGen(WrdArray.java:41)

What variable at line 41 of the WrdArray class is null? When you find the variable backtrack in your code to see why that variable is null and change the code so it is not null.

If you are not sure which, add print out the values of all the variables that are used on line 41 before they are used.

You don't call
wrd.FileToArray();
so you don't initialize wrd.
Try:

	public void PlayGame() {
		try {
			wrd.FileToArray();
		} catch (IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
		String gWrd = wrd.RandomWrdGen();
		char newwrd[] = new char[100];
		for (int i = 0; i < gWrd.length(); i++) {
			newwrd[i] = '-';
		}
		System.out.println(newwrd);
		int error = 0;
		int correct = 0;
		while (error != 5 && correct != gWrd.length()) {
			boolean flag = false;
			char guess = JOptionPane.showInputDialog("Guess a letter")
					.charAt(0);
			for (int o = 0; o < gWrd.length(); o++) {
				if (guess == gWrd.charAt(o)) {
					newwrd[o] = guess;
					correct++;
					flag = true;
				}
			}
			if (flag == false) {
				error++;
			}
			System.out.println(newwrd);
		}
		if (correct == gWrd.length()) {
			JOptionPane.showMessageDialog(null, "You win!");
		} else {
			JOptionPane.showMessageDialog(null, "You lose!");
		}
	}