змейка не увиличивается в размерах, как исправить?

package com.javarush.games.snake; import java.util.List; import java.util.ArrayList; import com.javarush.engine.cell.*; //Создаем змейку public class Snake { public Snake(int x,int y){ GameObject first = new GameObject(x,y); GameObject second = new GameObject(x+1,y); GameObject third = new GameObject(x+2,y); snakeParts.add(first); snakeParts.add(second); snakeParts.add(third); } private List<GameObject> snakeParts = new ArrayList<>(); private static final String HEAD_SIGN = "\uD83D\uDC7E"; private static final String BODY_SIGN = "\u26AB"; public boolean isAlive = true; /*public void move(){ GameObject newHead = createNewHead(); if ((newHead.x < 0) || (newHead.x >= SnakeGame.WIDTH) || (newHead.y < 0) || (newHead.y >= SnakeGame.HEIGHT)) { this.isAlive = false; } else { snakeParts.add(0, newHead); removeTail(); } } */ public void move(Apple apple) { GameObject newHead = createNewHead(); if (newHead.x < 0 || newHead.x >= SnakeGame.WIDTH || newHead.y < 0 || newHead.y >= SnakeGame.HEIGHT || newHead == apple) { isAlive = false; } if (checkCollision(newHead)) { isAlive = false; } else if(newHead.x == apple.x && newHead.y == apple.y){ apple.isAlive = false; snakeParts.add(0, newHead); } else { snakeParts.add(0, newHead); removeTail(); } } public boolean checkCollision(GameObject object) { boolean check = false; for (int i = 0; i < snakeParts.size(); i++) if ((object.x == snakeParts.get(i).x) && (object.y == snakeParts.get(i).y)) { check = true; } return check; } //Создание новой головы public GameObject createNewHead (){ GameObject gameObject = new GameObject(0,0); if (direction==Direction.UP){ gameObject = new GameObject(snakeParts.get(0).x, snakeParts.get(0).y-1); }else if (direction==Direction.DOWN){ gameObject = new GameObject(snakeParts.get(0).x, snakeParts.get(0).y+1); }else if (direction==Direction.LEFT){ gameObject = new GameObject(snakeParts.get(0).x-1, snakeParts.get(0).y); }else if (direction==Direction.RIGHT){ gameObject = new GameObject(snakeParts.get(0).x+1, snakeParts.get(0).y); } return gameObject; } //Удаление последнего элемента public void removeTail(){ snakeParts.remove(snakeParts.size()-1); } public int getLength() { return snakeParts.size(); } private Direction direction = Direction.LEFT; //Выбираем сторону движения public void setDirection(Direction direction) { if (this.direction == Direction.LEFT && (direction == Direction.RIGHT || snakeParts.get(0).x == snakeParts.get(1).x)) return; if (this.direction == Direction.RIGHT && (direction == Direction.LEFT || snakeParts.get(0).x == snakeParts.get(1).x)) return; if (this.direction == Direction.UP && (direction == Direction.DOWN || snakeParts.get(0).y == snakeParts.get(1).y)) return; if (this.direction == Direction.DOWN && (direction == Direction.UP || snakeParts.get(0).y == snakeParts.get(1).y)) return; this.direction = direction; } /* public void setDirection(Direction direction){ if (direction == Direction.RIGHT && this.direction == Direction.LEFT) return; if (direction == Direction.LEFT && this.direction == Direction.RIGHT) return; if (direction == Direction.DOWN && this.direction == Direction.UP) return; if (direction == Direction.UP && this.direction == Direction.DOWN) return; this.direction = direction; } */ /* game.setCellValue(snakeParts.get(0).x, snakeParts.get(0).y, HEAD_SIGN); for (int i = 1; i < snakeParts.size(); i++) { game.setCellValue(snakeParts.get(i).x, snakeParts.get(i).y, BODY_SIGN); */ //Отрисовка змейки public void draw(Game game) { Color cellColor; if (isAlive) { cellColor = Color.BLACK; } else { cellColor = Color.RED; } game.setCellValueEx(snakeParts.get(0).x, snakeParts.get(0).y, Color.NONE, HEAD_SIGN, cellColor,75); game.setCellValueEx(snakeParts.get(1).x, snakeParts.get(1).y, Color.NONE, BODY_SIGN, cellColor,75); game.setCellValueEx(snakeParts.get(2).x, snakeParts.get(2).y, Color.NONE, BODY_SIGN, cellColor,75); } } snakeParts.add(first); snakeParts.add(second); snakeParts.add(third); } private List<GameObject> snakeParts = new ArrayList<>(); private static final String HEAD_SIGN = "\uD83D\uDC7E"; private static final String BODY_SIGN = "\u26AB"; public boolean isAlive = true; /*public void move(){ GameObject newHead = createNewHead(); if ((newHead.x < 0) || (newHead.x >= SnakeGame.WIDTH) || (newHead.y < 0) || (newHead.y >= SnakeGame.HEIGHT)) { this.isAlive = false; } else { snakeParts.add(0, newHead); removeTail(); } } */ public void move(Apple apple) { GameObject newHead = createNewHead(); if (newHead.x < 0 || newHead.x >= SnakeGame.WIDTH || newHead.y < 0 || newHead.y >= SnakeGame.HEIGHT || newHead == apple) { isAlive = false; } if (checkCollision(newHead)) { isAlive = false; } else if(newHead.x == apple.x && newHead.y == apple.y){ apple.isAlive = false; snakeParts.add(0, newHead); } else { snakeParts.add(0, newHead); removeTail(); } } public boolean checkCollision(GameObject object) { boolean check = false; for (int i = 0; i < snakeParts.size(); i++) if ((object.x == snakeParts.get(i).x) && (object.y == snakeParts.get(i).y)) { check = true; } return check; } //Создание новой головы public GameObject createNewHead (){ GameObject gameObject = new GameObject(0,0); if (direction==Direction.UP){ gameObject = new GameObject(snakeParts.get(0).x, snakeParts.get(0).y-1); }else if (direction==Direction.DOWN){ gameObject = new GameObject(snakeParts.get(0).x, snakeParts.get(0).y+1); }else if (direction==Direction.LEFT){ gameObject = new GameObject(snakeParts.get(0).x-1, snakeParts.get(0).y); }else if (direction==Direction.RIGHT){ gameObject = new GameObject(snakeParts.get(0).x+1, snakeParts.get(0).y); } return gameObject; } //Удаление последнего элемента public void removeTail(){ snakeParts.remove(snakeParts.size()-1); } public int getLength() { return snakeParts.size(); } private Direction direction = Direction.LEFT; //Выбираем сторону движения public void setDirection(Direction direction) { if (this.direction == Direction.LEFT && (direction == Direction.RIGHT || snakeParts.get(0).x == snakeParts.get(1).x)) return; if (this.direction == Direction.RIGHT && (direction == Direction.LEFT || snakeParts.get(0).x == snakeParts.get(1).x)) return; if (this.direction == Direction.UP && (direction == Direction.DOWN || snakeParts.get(0).y == snakeParts.get(1).y)) return; if (this.direction == Direction.DOWN && (direction == Direction.UP || snakeParts.get(0).y == snakeParts.get(1).y)) return; this.direction = direction; } /* public void setDirection(Direction direction){ if (direction == Direction.RIGHT && this.direction == Direction.LEFT) return; if (direction == Direction.LEFT && this.direction == Direction.RIGHT) return; if (direction == Direction.DOWN && this.direction == Direction.UP) return; if (direction == Direction.UP && this.direction == Direction.DOWN) return; this.direction = direction; } */ /* game.setCellValue(snakeParts.get(0).x, snakeParts.get(0).y, HEAD_SIGN); for (int i = 1; i < snakeParts.size(); i++) { game.setCellValue(snakeParts.get(i).x, snakeParts.get(i).y, BODY_SIGN); */ //Отрисовка змейки public void draw(Game game) { Color cellColor; if (isAlive) { cellColor = Color.BLACK; } else { cellColor = Color.RED; } game.setCellValueEx(snakeParts.get(0).x, snakeParts.get(0).y, Color.NONE, HEAD_SIGN, cellColor,75); game.setCellValueEx(snakeParts.get(1).x, snakeParts.get(1).y, Color.NONE, BODY_SIGN, cellColor,75); game.setCellValueEx(snakeParts.get(2).x, snakeParts.get(2).y, Color.NONE, BODY_SIGN, cellColor,75); } }