Re: null pointer exception problem

[tbarbone]

hey im having the same problem with my code im a beginner in a programing class and have been trying to figure it out for days im trying to build a game of hangman.

class TestGuessList
{
  private char guessList;
  public static void main (String []args)
  {
    GetInput input = new GetInput();
    GuessList list = new GuessList();
    char guessList = ' ';
    int turns=5;
 
    for (int f=0;f<5;f++)
    {
      boolean done = false;
      System.out.println("You have " + turns + " turns remaining ");
      while (done == false)
      {
        input.setUserInput();
        guessList=input.getUserInput();
        while (list.inGuessList(guessList)==true)
        {
        System.out.println("This letter has already been guessed");
        }
        done = false;
      }
       turns--;      
      System.out.print("the letters that you have already guessed and added to you ignore list are: ");
      list.print();
      System.out.println("\n");
    }
  }
}
 
the method class is this
 
public class GuessList// Class is responsible for insuring the letter guess is valid.
{
  private char[] list; //Creates a private array character variable called list.
    public GuessList()// Creates a public method called GuessList.
    {
      char[] list = new char [0];//Creates an array called list.
    }
   public boolean inGuessList(char c)//Creates a public boolean method called inGuessList.
    {
     boolean duplicate=false;//Creates a boolean called duplicate and sets it to false.
      for(int x=0; x<list.length;x++)/*Creates a for loop with int x and sets it less then the length of 
       * list and not equal to duplicate.*/
     {
      if(list[x] == c )// Ifs statement for if list is equal to c.
      {
        duplicate = true;//Makes duplicate true.
        return duplicate;//Returns duplicate.
      }
      }
      return false;
    }
 
    public void print()//Print method.
    {
      System.out.println("The letters you have guessed are ");//Prints the letters guessed to the user.
      for(int i = 0;i<list.length;i++)//Creates a for loop for int i.
      {
        System.out.println(list[i] + " ");//Prints list[i].
      }
    }
    char[] getGuessList()//Creates an array method.
    {
      return list;//Returns the list.
    }
    public void addToGuessList(char guesses)//Creates a method called addToGuessList.
    {
      char[] list2 = new char [list.length +1];//Creates a second longer array.
      for(int t = 0; t<list.length; t++)//Creates a for loop less the the size of list.
      {
        list2[t]=list[t];//Makes list2[t] equal to list[t].
      }
      list2[list.length] = guesses;//Makes list2[list.length] equal to guesses.
      list=list2;//Makes list equal to list2.
    }    
    }

please help..

[copeg]

First, please don't hijack someone else's post - I've moved this to its own thread. Second, in the future please use the code tags - makes the source code readable. Lastly, you've posted a bit of code - I recommend posting the exception stack trace which helps pinpoint the problem.