Preview screen is blank

I'm working on this challenge, getting a message that there's a compiler error but the Preview screen is blank so I'm not getting a clue as to where the error is.

public class ConferenceRegistrationAssistant {

public int getLineFor(String lastName) { /* If the last name is between A thru M send them to line 1 Otherwise send them to line 2 */ int line = 0; Console console = System.console(); lastName = console.readLine("Enter Last Name: "); char initial = lastName.charAt(0); if (initial < 'N') { line = 1; } else { line = 2; } return line; }

}

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

    }

    public boolean hasTile(char tile) {
       return false;
    }
}