Java Code Help

[Ryan5262]

Being asked to wright a java program for Uni guess the Random Number Game getting this Error Message
H:\Java\RandomGame.java:24: cannot Resolve symbol
symbol : method parseInt (int)
location:22: class java.lang.Integer
Dont get to see ma lectuer till next week and its due friday so could and one shed some light would be great

Heres the program code

import javax.swing.JOptionPane;
public class RandomGame {
public static boolean checkGuess(int userGuess , int RandomNumber)  {
    boolean match = false;
    if (userGuess == RandomNumber)
    match = true;
    return match;
        }    //end Boolean    
public static void main (String args[]) {
    String userNumber;
    int RandomNumber,userGuess;
    final int ARRAY_SIZE = 3;
    int [] myArray = new int [ARRAY_SIZE];
    String output="";
    boolean match;
    
    // generate a random number between 1 and 10
            RandomNumber = (int) (Math.random() * 9) + 1;              
                                      
                                                                 
    for (int x = 0; x < myArray.length; x++) {
      // read string, convert to int and store in array
      userNumber = JOptionPane.showInputDialog("please enter a number");
          userNumber = Integer.parseInt(userGuess);
                               
        
                // You have Won Output
                    match = checkGuess(userGuess,RandomNumber);
                  if (match == true) {
                      // construct output 
                  output = "You Have Won! "+RandomNumber;
                        break;
                  }//End If 
                  else{
                  // prompt user for Guess
                  userNumber = JOptionPane.showInputDialog("Please enter another Guess");
                                      match = checkGuess(userGuess,RandomNumber);
                  if (match == true) {
                      // construct output 
                  output = "You Have Won! "+RandomNumber;
                        break;
                        }
             }// End Else
      }    //End For
      
      
      
    // print message
               JOptionPane.showMessageDialog(null, output, "Win", JOptionPane.INFORMATION_MESSAGE);
    
        System.exit(0);
    }//End Main

} 

[blacksheep]

if you want to put the integer that is in userGuess into the String that is userNumber the easy way that I'd do it would be userNumber = "" + userGuess

its there that it seems to be stalling (line 24) as it doesn't seem to recognise the method parseInt also the parseInt method expects a string not an int like you're passing it - which may be why it doesn't recognise it.

[salvadorescobar]

I haven't read through your code in much detail (just the first few lines and line 24) and the problem you are seeing is a compiler error that has been reported due to the fact that during compilation the compiler hasn't been able to find the method Integer.parseInt anywhere within the hierarchy of your imports.

There could be one of two issues here. Either you need to include Integer on your imports (by adding import java.lang.Integer in your top section); or Integer.parseInt(int) does not exist as a method within the java.lang.Integer class.

Looking at the API (http://java.sun.com/j2se/1.4.2/docs/...g/Integer.html) I can see that Integer.parseInt accepts either a string or a string and int parameter. There is not method that accepts only an int. This is after all a method for parsing a string into an integer representation so this kind of makes sense.

I think that line 24 should read:

userGuess = Integer.parseInt(userNumber); 

Instead of

userNumber = Integer.parseInt(userGuess); 

And you have just made a mistake in selecting the correct variables from your code.

This has probably happened due to bad variable naming on your part.

Redefining userNumber as an int and userGuess as a string would make things clearer.

Sal.

[blacksheep]

you don't have to import/include Integer - its included as standard.

[Ryan5262]

Thanks for the help !!!! Could you help me with this last bit ? i cant do java! just confuses me. just due in tomorrow and ive got no clue what to do and i dont see my lectuer till next week. dont want to fail i was a late start to the college and misees a few weeks due to work issues.

Add a further method to your program which gives the user a hint as to whether the guess they made is close to the correct answer. The method signature is given below. The method should print "cold" if the users guess is 3 or more away from the correct answer. It should print "warm" if the guess if 2 away from the correct answer. It should print "hot" is the guess is only 1 away than the correct answer. Modify your program from (1) so that this method is called after every attempt by the user to guess the number.
public static String howClose(int userGuess, int randomNumber)

Heres what ive done so far with it where would i add the message ? and how would i fix the howClose Class?

    return match;
        }    //end Boolean    
        
public static String howClose(int userGuess, int RandomNumber){
        for (userGuess < 2 || RandomNumber > 2){
             cold = true;
                return cold;
            
                if (userGuess < 2 || RandomNumber > 2) 
                    warm = true;
                    return warm;
                }
                    else {(userGuess < 1 || RandomNumber > 1) 
                    hot = true;
                    return hot;
                    }
        }


    
public static void main (String args[]) {
    String userGuess;
    int RandomNumber,userNumber;
    String output="";
    boolean match;
    boolean hot,cold,warm;
        

    // generate a random number between 1 and 10
            RandomNumber = (int) (Math.random() * 9) + 1;                              
        
               
    // Progam to run 3 Times before Exit
        for (int counter = 0; counter <= 3; counter++) {
          if (counter == 3) {
                      
                // If User is wrong 3 times then they are lost
               output ="You have Lost Try Again The Random Number Was  "+ RandomNumber;
  
    
            // print message
               JOptionPane.showMessageDialog(null, output, "Lost", JOptionPane.INFORMATION_MESSAGE);       
               
                }//End If   
            else{                 
                    // prompt user for Guess
                  userGuess = JOptionPane.showInputDialog("Please enter a Guess");    
               
            // convert string to integer
                userNumber = Integer.parseInt(userGuess);
            
                // You have Won Output
                  match = checkGuess(userNumber,RandomNumber);
                  if (match == true) {
                      // construct output 
                  output = "You Have Won! "+RandomNumber;
                        break;
                  }//End If 
             }// End Else
      }    //End For
       
    // print message
               JOptionPane.showMessageDialog(null, output, "Win", JOptionPane.INFORMATION_MESSAGE);
    
        System.exit(0);
    }//End Main
} 

[blacksheep]

ok the how close class I'd get (value to guess - the guessed value) and make sure thats positive, either by squaring and square rooting or seeing if its less than 0 and multiplying by -1 then put that in a switch statement

so you'd do something like

int difference = (guessValue - randomNumber);
if (difference < 0)
difference = difference * -1;
switch(difference)
{  
  case(1)
  Systme.out.println("hot");
  break;

  case(2)
  System.out.println("warm")
  break;

  default
  system.out.println("cold")
  break;
}

obviously that assumes you don't go into this with a correct guess.

[canardo]

Ryan5262 as a programmer and I am sure salvadorescobar will agree as he helped me when I was at uni, one word of advice start your assignments the night before they are due in and then ask for help, as if you dont learn these fundamentals you will never pass your final year!

[Ryan5262]

Ryan5262 as a programmer and I am sure salvadorescobar will agree as he helped me when I was at uni, one word of advice start your assignments the night before they are due in and then ask for help, as if you dont learn these fundamentals you will never pass your final year!

as i sayed above i was a late start to college i started two weeks ago and had to catch up on 5 weeks worth of work and try and meet all dead lines so was a bit of a struggle thats why i asked for help and i am so greatfull for it!!! thanks every one see how i get on today with it

[Ryan5262]

Got it up and going working a treat !!! thanks for the help you saved me so much there !!!!


Thanks Again!!!