HeadFirstJava - SimpleDotCom

[Negru Ionut Valentin]

Hello to everyone!

I recently started reading HFJ - very good book, but now i'm stuck!

I can't compile this program - SimpleDotCom.

I have 3 classes:

  public class SimpleDotCom{
	int[] locationCells;
	int numOfHits = 0;
	
	public void setLocationCells(int[] locs){
		locationCells = locs;
	}
	
	public String checkYourself(String stringGuess){
		int guess = Integer.parseInt(stringGuess);
		String result = "Ratat";
		for(int cell : locationCells){
			if(guess == cell){
				result = "Lovit";
				numOfHits++;
				break;
			}
		}
		if(numOfHits == locationCells.length){
			result = "Distrus";
		}
		System.out.println(result);
		return result;
	}
}  

 public class SimpleDotComGame{
	public static void main(String[] args){
		int numOfGuesses = 0;
		GameHelper helper = new GameHelper();
		SimpleDotCom theDotCom = new SimpleDotCom();
		int randomNum = (int) (Math.random() * 5);
		int[] locations = {randomNum, randomNum+1, randomNum+2};
		theDotCom.setLocationCells(locations);
		boolean isAlive = true;
		
		while(isAlive){
			String guess = helper.getUserInput("Incearca un numar: ");
			String result = theDotCom.checkYourself(guess);
			numOfGuesses++;
			if(result.equals("Distrus")){
				isAlive = false;
				System.out.print("Ai avut nevoie de " + numOfGuesses + "incercari");
			}
		}
	}
}   

and

 import java.io.*;

public class GameHelper{
	public String getUerInput(String prompt){
		String inputLine = null;
		System.out.print(prompt + " ");
		try{
			BufferedReader is = new BufferedReader(new InputStreamReader(System.in));
			inputLine = is.readLine();
			if(inputLine.length() == 0) return null;
		}
		catch(IOException e){
			System.out.println("IOException: " + e);
		}
		return inputLine;
	}
}   

I get this error when i compile the second one ... for about 2 hours i try to figure out what is the problem but i can;t .
Please help.

  SimpleDotComGame.java:14: cannot find symbol
symbol  : method getUserInput(java.lang.String)
location: class GameHelper
                        String guess = helper.getUserInput("Incearca un numar: "
);
                                             ^
1 error  

[Christophe Verré]

Read the error message carefully :
SimpleDotComGame.java:14: cannot find symbol
symbol : method getUserInput(java.lang.String)
location: class GameHelper
String guess = helper.getUserInput("Incearca un numar: ");

Now ask yourself : What type is helper ? Is there a method called getUserInput in that class ?

[kannan vinayagam Duraiswamy]

see the method name in the GeameHelper : it is getUerInput not getUserInput

[Negru Ionut Valentin]

Thanks guys ... it was that typing error ... i thought it was something like that but i didn't discovered it.

Thanks again.