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

Charlie Gallentine
Charlie Gallentine
934 Points
Posted by Charlie Gallentine
Charlie Gallentine
934 Points

For/each loops and char arrays. Where is my thinking going wrong on this exercise?

I'm lost. Thanks for any help!

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 String getTileCount(char tile){
  for(char tile : mHand.toCharArray()) {
    System.out.println("We have: " + tile);
  }
    return mHand;
  }
}
Ivan Kazakov
Ivan Kazakov
Courses Plus Student 43,317 Points
Ivan Kazakov
Ivan Kazakov
Courses Plus Student 43,317 Points

Hello Charlie,

your method should return a number of times the 'mHand' contains given 'tile'. So the return type should be int.

In this case to return an integer it's good to declare one first, and set an initial value of 0:

int count = 0;

Then you'd perform a char-by-char comparison of 'mHand' chars with the 'tile', using for/each loop, where you would increment 'count' for each matching evaluation:

for(char mHandChar : mHand.toCharArray()){
      if (tile == mHandChar){
        count++;
      }
    }

then you return the value of a 'count' integer variable, which may vary from 0 to the length of an 'mHand' string (if all of its chars are equal to the inspected tile:

return count;

3 Answers

anil rahman
anil rahman
7,786 Points
anil rahman
anil rahman
7,786 Points 
  public int getTileCount(char tile){ --pass in a char
  int count = 0; -- set counter
    for(char letter:mHand.toCharArray()){ -- for each letter in the hand
      if(letter == tile){ -- and if letter in the hand matches the tile
         count++; --increase count
      }
    }
    return count;--return the count variable
  }
Grigorij Schleifer
Grigorij Schleifer
10,365 Points
Grigorij Schleifer
Grigorij Schleifer
10,365 Points

Hi Charlie,

you need an integer variable to count the characters in mHand. In the beginning set it to 0. Use the for loop but call your char variable different than the argument name. If that char is equals to the argument char. Increment the count. Aftre the loop is done, return the counter.

You code can look like this:

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

Makes sense?

Grigorij

Lukas Dahlberg
Lukas Dahlberg
53,736 Points
Lukas Dahlberg
Lukas Dahlberg
53,736 Points

In this challenge, you are looping through the already existing mHands string to find out how many matches there are to any given tile and then returning the integer count (not the the System.out.println() of each).

public Integer getTileCount(char tile) {

Integer count = 0;

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