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

Luiz Fernando Bojikian da Costa Vital
Luiz Fernando Bojikian da Costa Vital
7,193 Points
Posted by Luiz Fernando Bojikian da Costa Vital
Luiz Fernando Bojikian da Costa Vital
7,193 Points

I can't solve "Code Challenge: For Each Loop" of Java Objects. Can anyone help me please?

I've tried many times but I just can't figure it out :(

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(char letter){
    int count = 0;
    for (char c : mHand.toCharArray()){
      if (hasTile(letter)){
        count ++;
      }

    }  

    return count;
  }
}

2 Answers

Grigorij Schleifer
Grigorij Schleifer
10,365 Points
Grigorij Schleifer
Grigorij Schleifer
10,365 Points

Hi Fernando,

if you use your code your count will be always equals to the number of characters in the mHand.

Allow me to explain why:

I added one more curly bracket and the return statement I have missed in your code.

  public int getTileCount(char letter){
    int count = 0;
    for (char c : mHand.toCharArray()){
// the for loop checks every character of the mHand array so if mHand has 8 characters, there will be 8 loops
// so for every character the compiler enters the if loop
// If you have a "letter" that is inside mHand the if-condition will be true and count will increase by 1
// because the hasTile() method proofs if there is a letter inside mHand
// but this letter stays in mHand and next time the "hasTile(letter) will be true again and counter will be increase again
// and so on ..... 

      if (hasTile(letter)){
        count ++;
      }
    }  
   return count;
  }

So you need to modificate your if statement to:

 public int getTileCount(char letter){
    int count = 0;
    for (char c : mHand.toCharArray()){
      if (letter == c){
// here you are looking for a specific character inside mHand 
// and the compiler "climbs" from first char to the next char
// and the condition is only true if letter is inside mHand not always
        count ++;
      }
    }  
   return count; // return value added
  } // bracket added

Hope that helps

Grigorij

Luiz Fernando Bojikian da Costa Vital
Luiz Fernando Bojikian da Costa Vital
7,193 Points
Luiz Fernando Bojikian da Costa Vital
Luiz Fernando Bojikian da Costa Vital
7,193 Points

Hi Grigorij!

Thanks a lot! I can see what I was doing wrong now.

Thanks again!

Cheers, Luiz