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

Quinton Rivera
Quinton Rivera
5,177 Points
Posted by Quinton Rivera
Quinton Rivera
5,177 Points

Please tell me why my code did not work when i declare and initialized count outside of the getTileCount method

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

why did it only work when i wrote it as I am very confused public int getTileCount(char guessTile){ int count = 0; for(char answerTile: mHand.toCharArray()){ if(answerTile == guessTile){ count++;}} return count;}

tobiaskrause
tobiaskrause
9,160 Points

Just to make it more readable

int count = 0; 
public int getTileCount(char guessTile) { 
for(char answerTile: mHand.toCharArray()) {
 if(answerTile == guessTile){
 count++;
}
}
 return count;}
Quinton Rivera
Quinton Rivera
5,177 Points
Quinton Rivera
Quinton Rivera
5,177 Points

So does that mean i can initialize my counter variable outside of the method and it should work? I apologize but i did not understand your answer. In my java class I am taught to declare variables with global scope

2 Answers

tobiaskrause
tobiaskrause
9,160 Points
tobiaskrause
tobiaskrause
9,160 Points

Your code will pass, if the "int count = 0;" is inside of the method. Also watch out i also made some mistakes because I missed/deleted some curly brackets.

tobiaskrause
tobiaskrause
9,160 Points

The code i posted was the original code from you...is just formatted it to make it more readable

La Gracchiatrice
La Gracchiatrice
4,615 Points
La Gracchiatrice
La Gracchiatrice
4,615 Points

On my laptop I compiled and tested the two snippet of code and the outcomes were the same. Only in the code challege the outcomes are different. I suppose that Treehouse checks the answer against an ScrabblePlayer class with implemetation that differs from what we see . In this unknown implemetation Treehouse could use the count variable in other methods so if you define count as a instance variables other methods can change count value so the test could fail.

public class Main {

    public static void main(String[] args) {
    // write your code here
        ScrabblePlayer1 test=new ScrabblePlayer1("sreclhak");
        System.out.println(test.getTileCount('n'));
    }
}



public class ScrabblePlayer1 {
    private String mHand;

    public ScrabblePlayer(String hand) {
        mHand = hand;
    }

    public String getHand() {
        return mHand;
    }

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



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

public class Main {

    public static void main(String[] args) {
    // write your code here
        ScrabblePlayer2 test=new ScrabblePlayer2("sreclhak");
        System.out.println(test.getTileCount('n'));
    }
}



public class ScrabblePlayer2 {
    private String mHand;

    public ScrabblePlayer(String hand) {
        mHand = hand;
    }

    public String getHand() {
        return mHand;
    }

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


    int count = 0;
    public int getTileCount(char guessTile) {

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