Player.java

import java.util.*;

public class Player {
    private Tile[] rack; // tiles that can be played from the rack
    private int score;

    public Player() {
        rack = new Tile[7];
        score = 0;
    }

    public String getScore() {
        return String.valueOf(score);
    }

    public void setScore(int num) {
        score = num;
    }

    public void addScore(int num) {
        score = score + num;
    }

    public void shuffleRack() {
        List<Tile> list = Arrays.asList(rack);
        Collections.shuffle(list);
        list.toArray(rack);
    }

    // pushes tiles in rack to left side, leaving no spaces in between tiles.
    public void organizeRack() {
        for (int i = 0; i< 6; i++) {
            if (rack[i] == null) {
                for (int j = i + 1; j < 7; j++) {
                    rack[i] = rack[j];
                    rack[j] = null;
                    break;
                }
            }
        }
    }

    public Tile getFromRackAt(int index) {
        return rack[index];
    }

    public Tile getAndRemoveFromRackAt(int index) {
        Tile temp = rack[index];
        rack[index] = null;
        return temp;
    }

    // adds tile to next free index in rack array the returns which index, -1 if no free index to insert tile
    public int addTileToRack(Tile tile) {
        for (int i = 0; i < rack.length; i++) {
            if (rack[i] == null) {
                rack[i] = tile;
                return i;
            }
        }
        return -1;
    }

    // helper function for undo button
    public void addTileToRackAt(Tile tile, int index) {
        if (rack[index] == null) {
            rack[index] = tile;
        }
    }

    public boolean rackIsFull() {
        int count = 0;
        for (int i = 0; i < rack.length; i++) {
            if (rack[i] != null) {
                count++;
            }
        }
        return count == 7;
    }

    public int getRackSize() {
        int count = 0;
        for (int i = 0; i < rack.length; i++) {
            if (rack[i] != null) {
                count++;
            }
        }
        return count;
    }

    public Tile[] getRack() {
        return this.rack;
    }
}