While working from Head first java, I came across this problem... Please help

I think i understand what the problem is, but i am not getting an ideas as to how to fix it...
The code looks like this....

import java.io.*;
import java.util.*;
import java.util.ArrayList;

public class Game {
    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 == true)

{
            String guess = helper.getUserInput("enter a number");
            String result = theDotCom.checkYourself(guess);
            numOfGuesses++;
            if (result.equals("kill")) {
                isAlive = false;
                System.out.println("You took " + numOfGuesses + " guesses");
            }
        }
    }
}

class SimpleDotCom {

private ArrayList<String> locationCells;

//int numOfHits = 0;
    
    public void setLocationCells(ArrayList<String> loc)

{

locationCells = loc;

}
    
    public String checkYourself(String userInput) {

//int guess = Integer.parseInt(stringGuess);

String result = "miss";

int index = locationCells.indexOf(userInput);

if (index >= 0) {

locationCells.remove(index);

if (locationCells.isEmpty())

{
        
            result = "kill";

} else {

result = "hit";
	
	} // Close if

} // Close outer if

return result;

}

class GameHelper {

private static final String alphabet = "abcdefg";
  private int gridLength = 7;
  private int gridSize = 49;
  private int [] grid = new int[gridSize];
  private int comCount = 0;

public String getUserInput(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.toLowerCase();
  }
}

and the error is

D:\Java\Game>javac game.java
game.java:18: setLocationCells(java.util.ArrayList<java.lang.String>) in SimpleD
otCom cannot be applied to (int[])
theDotCom.setLocationCells(locations);
^
1 error

I understand that
int [] locations ... defines locations as an array of int.

public void setLocations(ArrayList<String> loc) ...
the args for setLocations is an object of the ArrayList<String> not an int array.

And thats the complaint in the error, but how do i fix this here....
Kindly type the code for me to fix it....

Thank you,
Mike

Turn the int[] into an ArrayList<String>.

Thank you Rob

So I gotta change it this way right??

Original: int[] locations = {randomNum, randomNum+1, randomNum+2};

Changed: ArrayList<String> locations = {randomNum, randomNum+1, randomNum+2};

But still this gives me the following error

D:\Java\Game>javac Game.java
Game.java:16: illegal initializer for java.util.ArrayList<java.lang.String>
ArrayList<String> locations = {randomNum, randomNum+1, randomNum+2};
^
1 error

Can you please help me by writing that part of the code for me.

Thanks a million Rob.

So I gotta change it this way right??

Original: int[] locations = {randomNum, randomNum+1, randomNum+2};

Changed: ArrayList<String> locations = {randomNum, randomNum+1, randomNum+2};

No.... take a look at the JavaDoc for the java.util.ArrayList class for details on how to use the class.

Can you please help me by writing that part of the code for me.

If you don't do it yourself -- by expecting people to write the code for you -- how are you ever going to learn the subject?

Henry

Yes Henry. I understand. I will try to solve it myself.

Thanks for your advice,
Mike

You should check out the APIs of java.lang.Integer and/or java.lang.String for methods that can convert an int into a String.