Thread: Hangman game loop

Hello all,
For my exam we're supposed to be able to write a program that allows for the user to input a phrase, prints that phrase as all "?"s, and then allows for more input as to guess at the phrase and slowly replace the "?"s with the actual letters...
I have the most of the code done, but I'm having trouble replacing the "?"s with the actual letters, I'll post the code up here..

import java.util.Scanner;
public class Assn07
{
 
       public static void main(String[] args)
       {
               Scanner stdIn = new Scanner(System.in);
 
               String phrase;
               String hiddenphrase;
               int numchars;
               int numloop;
               String guess;
               hiddenphrase = "";
               char guesschar;
 
 
 
 
               System.out.println("Enter the common phrase to be guessed:");
               phrase = stdIn.nextLine();
 
 
               numchars = phrase.length();
               numloop = 0;
               System.out.println("\n");
 
 
               for(numloop = 0;numchars > numloop; numloop++)
               {
            	   char qmarks = phrase.charAt(numloop);
 
            	   if(qmarks == ' ')
            	   {
            		  hiddenphrase += " ";
            	   }
            	   else
            	   {
            		   hiddenphrase += "?";
            	   }
 
               }
               System.out.println(hiddenphrase);
 
 
 
              while(hiddenphrase != phrase)
              {
            	  System.out.print("Enter your character guess!");
            	  guess =stdIn.next();
            	  guesschar = guess.charAt(0);
            	  for(numloop = 0; numchars > numloop; numloop++)
            	  {
            		  System.out.println("poop");
            		  if(guesschar == phrase.charAt(numloop))
            		  {
            			  guesschar = hiddenphrase.charAt(numloop);
            			  System.out.println(hiddenphrase);
            		  }
 
            	  }
 
             }
 
              System.out.println("Congratulations! You win!");
              System.exit(0);
       }
}

How do I set the charAt(numloop) in hiddenphrase to change to guesschar? (in the nested while)
Thanks!

EDIT: Ignore the print "poop", I just use that to make sure the loop is working correctly.

Since this is for an exam, should you be getting help from a programming forum?

This program I'm writing is not graded -- on thursday we have to go in and write something similar to this, this program I'm writing is for the study guide.