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Java Java Objects (Retired) Creating the MVP For Each Loop

Patrick VanVorce
Patrick VanVorce
1,952 Points
Posted by Patrick VanVorce
Patrick VanVorce
1,952 Points

In the quiz following, it asks you to make a getTileCount member. Should it be of type int?

So I set my for member function as follows and I keep getting a compiler error:

public int getTileCount() { int count = 0; for ( char tile : mHand.toCharArray()) { if (hasTile) { count ++; } } return count; }

Shouldn't this suffice? What am I doing wrong?

ScrabblePlayer.java 
public class ScrabblePlayer {
  private String mHand;

  public ScrabblePlayer() {
    mHand = "";
  }

  public String getHand() {
   return mHand;
  }

  public void addTile(char tile) {
    // Adds the tile to the hand of the player
    mHand += tile;
  }

  public boolean hasTile(char tile) {
   return mHand.indexOf(tile) > -1;
  }

  public int getTileCount() {
    int count = 0;
    for (char tile : mHand.toCharArray()) {
      if (hasTile) {
        count ++;
      }
    }
    return count;
  }
}

1 Answer

Steve Hunter
Steve Hunter
57,712 Points

Hi Patrick,

The hasTile method takes a parameter of type char. So to use it in your if statement would look like:

if (hasTile(tile))

However, the new method getTileCount needs to receive a char as a parameter too. It then returns the number of times that char appears in the mHand string. You have the pssed-in parameter, so you then need to loop through the mHand string (convert it to a char array, as you have done) - you then need to now if the parameter is equal to the current iteration element of the array. Just compare them directly.

Something like:

  public int getTileCount(char tile){
    int count = 0;
    for (char letter : mHand.toCharArray()) {
      if(letter == tile){
        count++;
      }
    }
   return count;
 }

That's not hugely dissimilar to what you've written. But the key here is passing in the letter to be counted and then comparing that to the element of the array.

Make sense?

Steve.

Patrick VanVorce
Patrick VanVorce
1,952 Points
Patrick VanVorce
Patrick VanVorce
1,952 Points

Thank you for your help, Steve.

Steve Hunter
Steve Hunter
57,712 Points

No problem! :+1: