Welcome to the Treehouse Community

The Treehouse Community is a meeting place for developers, designers, and programmers of all backgrounds and skill levels to get support. Collaborate here on code errors or bugs that you need feedback on, or asking for an extra set of eyes on your latest project. Join thousands of Treehouse students and alumni in the community today. (Note: Only Treehouse students can comment or ask questions, but non-students are welcome to browse our conversations.)

Looking to learn something new?

Treehouse offers a seven day free trial for new students. Get access to thousands of hours of content and a supportive community. Start your free trial today.

Java Java Objects Creating the MVP Scrabble Tiles

Clara Stancu
Clara Stancu
5,687 Points

Don't understand the "bummer"

In the statement it says: "to return true if the tile is in the tiles field, and false if it isn't." I did exactly that: return true ... return false. But the bummer says he wants the result if the expression; and if instead of "return true" i put "return isTile", the "bummer" says exactly the same thing. To what expression does it refer ?

ScrabblePlayer.java
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
    boolean isTile = tiles.indexOf(tiles) != -1;
    if (isTile) return true ;
    return false;
  }

}

1 Answer

Jonathan Grieve
MOD
Jonathan Grieve
Treehouse Moderator 91,004 Points

The code is challenging you to work out a way of passing without using an if statement but instead returning the result of the expression in hasTile()

  public boolean hasTile(char tile) {
    // TODO: Determine if user has the tile passed in
    return tiles.indexOf(tile) >= 0;
  }

This works because you're passing an expression to the return keyword, which only ever evaluates to true or false. Sionce the expression checks for greater than zero it will be a "truthy" value so returns true. In every ever instance (i.e. a retuen of less than zero the return value will be false.

Hope this helps! :)