Help with ArrayList

[Beth Laguardia]

I purchased the Head First Java And i am into the array list topic already. There's an example named class DotCom where the author used private ArrayList<String> locationCells.

I tried the program but it came up with an error. Please tell me what i generated the ff error: setLocations(java.util.ArrayList<java.lang.Integer> i DotCome cannot be applied to (int [] )
newGame.setLocations(locations);

Here's the code:

 import java.io.*;
 
class TestDotCom
{
  public static void main(String [] args) throws IOException
  {
   
    DotCom newGame = new DotCom();
    GameHelper Helper = new GameHelper ();
 
    int randomNum = (int) (Math.random() * 5);
    
    
  int [] locations = { randomNum, randomNum + 1, randomNum + 2 };
 
    newGame.setLocations(locations);
 
    int numOfGuess = 0;
    boolean isAlive = true;
 
    while (isAlive == true)
    {
      String guess = Helper.getUserInput("Enter your Guess: " );
      String result = newGame.checkGuess(guess);
     
      numOfGuess++;
 
      if (result.equals("Kill"))
        isAlive = false;
        
      
    }  
      
    }
 
}   

  class DotCom
{
  // int numOfHits = 0;
   //int [] locationCell;
 
   private ArrayList<String> locationCell;
 
   public void setLocations(ArrayList<String> loc)
   {
      locationCell = loc;
   } 
 
   
  public String checkGuess(String strGuess)
   {
      int guess = Integer.parseInt(strGuess);
      String result = "Miss";
     
      int index = locationCell.indexOf(guess);
     
      if(index >= 0)
         locationCell.remove(index);
 
         if (locationCell.isEmpty())   
         { 
            result = "Kill";
         }
 
      return result;
 
   }
}  

  import java.io.*;
 
public class GameHelper 
{
  public String getUserInput(String prompt)
  { 
    BufferedReader dataIn = new BufferedReader( new InputStreamReader(System.in));
   
    String inputLine = null;
 
    System.out.print(prompt + " ");
 
    try 
    {
  
      inputLine = dataIn.readLine();
 
      if (inputLine.length() == 0 ) return null;
    
    } 
 
   catch (IOException e)
    {
      System.out.print("Exception : " + e );
    }
 
   return inputLine;
     
    
 
  }
}  

I really think that the error is code int [] locations = { randomNum, randomNum + 1, randomNum + 2 }; because it's an integer and the arguments at the array list is a String.

Please help. Thanks!

[Norm Radder]

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.

The compiler doesn't like that and complains.
When you call setLocations you must pass it an arg of the type specified in its declaration, otherwise you'll get a compile error.

[Beth Laguardia]

I understand now. Thanks for the reply.