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Java Java Objects Creating the MVP Scrabble Tiles

Cory Walker
Cory Walker
6,037 Points

Not sure what I'm doing wrong

need assistance

public class ScrabblePlayer {
  // A String representing all of the tiles that this player has
  private String tiles;

  public ScrabblePlayer() {
    tiles = "";

  public String getTiles() {
    return tiles;

  public void addTile(char tile) {
    // TODO: Add the tile to tiles
tiles += tile;

  public boolean hasTile(char tile) {
    // TODO: Determine if user has the tile passed in
    if (tile.indexOf(tiles))
    return true;

/*Correct the existing hasTile method to return true if the
tile is in the tiles field, and false if it isn't. You can 
  solve this a few ways, however, I'd like you to practice 
  returning the result of the expression that uses the index 
  of a char in a String*/

Just switch "tiles" and "tile", it should look like this: if(tiles.indexOf(tile)) return true;

When you are using the indexOf command, you need to first write the string, and then the character, like this: String.indexOf(char)

Cory Walker
Cory Walker
6,037 Points

First off, thank you for your assistance, I tried that, and I still get an error, here is my code:

public boolean hasTile(char tile) { // TODO: Determine if user has the tile passed in if(tiles.indexOf(tile)) return true; }

Sorry for missleading you, i checked the syntax of the method again, apperantly I forgot it myself so it's good to refresh it. The method indexOf returns an integer, if the String doesn't have a char you are looking for it will return -1. So you want to write: return tiles.indexOf(tile) != -1; So what it does is if the String does not have a tile you are looking for, it will return -1, and it will return false because tiles.indexOf(tile) is written not equal to -1. If it has the char (tile) it will return a number not equal to -1 and will be true. Go to the workspace and try the method "indexOf" yourself and see how it works with jshell, you'll understand much better :)

Cory Walker
Cory Walker
6,037 Points

Thanks for all your help! This was a tough one for me, I was stuck on that problem for about a week. Thanks again!!!