Please help me to figure it out

Question about the task

Snake (Part 14/20)

Games, Level 0, Lesson 1

Under discussion

I can't understand why it's not getting verified Please help me!!!!!

Currently, the snake can pass through its own body, but this is against the rules. To fix this, you need to check the newly created snake head to see whether it coincides with any of the other snake segments. To do this, create a checkCollision(GameObject) method in the Snake class.

The checkCollision(GameObject) method must return true if the coordinates of the passed object match with the coordinates of one of the snake segments. Also, in the move(Apple) method, add a check to see whether the new head collides with its body. If a collision occurs, set the isAlive variable to false.

Requirements:

The Snake class must have a public boolean checkCollision(GameObject) method.
The checkCollision(GameObject) method must return true if the passed object's coordinates match the coordinates of any of the snake segments (elements in the snakeParts list).
The checkCollision(GameObject) method must return false if the passed object's coordinates do not match the coordinates of any of the snake segments (elements in the snakeParts list).
The move(Apple) method must call the checkCollision(GameObject) method with the new head as the argument before the new snake segment is added to the snakeParts list.
If the call to the checkCollision(GameObject) method returns true, the isAlive field must be set to false.
If the call to the checkCollision(GameObject) method returns true, the snakeParts list must not be changed.

package com.codegym.games.snake; import com.codegym.engine.cell.*; public class SnakeGame extends Game{ public static final int WIDTH = 15; public static final int HEIGHT = 15; private Snake snake; private int turnDelay; private Apple apple; public void initialize(){ setScreenSize(WIDTH,HEIGHT); createGame(); } private void createNewApple(){ int x = getRandomNumber(WIDTH); int y = getRandomNumber(HEIGHT); apple = new Apple(x,y); } public void onKeyPress(Key k){ if(k == Key.LEFT){ snake.setDirection(Direction.LEFT); } else if(k == Key.RIGHT ){ //if(snake.getDirection() != k) snake.setDirection(Direction.RIGHT); } else if(k == Key.UP ){ //if(snake.getDirection() != k) snake.setDirection(Direction.UP); } else if(k == Key.DOWN ){ //if(snake.getDirection() != k) snake.setDirection(Direction.DOWN); } // else{ // snake.setDirection(snake.getDirection()); // } } public void onTurn(int a){ //snake.move(); snake.move(apple); if(apple.isAlive==false){ createNewApple(); } drawScene(); } private void createGame(){ snake = new Snake(WIDTH/2,HEIGHT/2); createNewApple(); drawScene(); //Apple a = new Apple(7,7); //a.draw(this); turnDelay = 300; setTurnTimer(turnDelay); } private void drawScene(){ for(int i=0;i<WIDTH;i++){ for(int j=0; j<HEIGHT;j++){ setCellValueEx(i,j,Color.DARKSEAGREEN,""); } } snake.draw(this); apple.draw(this); } }

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cute bear

Level 3 , Hangzhou, China

15 August 2019, 04:02

public void move(Apple apple) {
        GameObject newHead = createNewHead();
        if (newHead != null) {
            int x = newHead.x;
            int y = newHead.y;
            // 判断新蛇头是否超出边界,新蛇头是否吃到自己
            if((x >= 0 && x < SnakeGame.WIDTH) && (y >= 0 && y < SnakeGame.HEIGHT) && (!checkCollision(newHead))) {
                // 添加新蛇头
                snakeParts.add(0, newHead);
                if (newHead.x == apple.x && newHead.y == apple.y) {
                    // 蛇吃掉苹果，苹果消失，不去除蛇尾
                    apple.isAlive = false;
                } else {
                    // 蛇没有吃掉苹果，去除蛇尾
                    removeTail();
                }
            }
            else {
                isAlive = false;
            }
        }
    }

public boolean checkCollision(GameObject gameObject) {
        boolean eatSelf = false;
        for (GameObject segment : snakeParts) {
            if (segment.x == gameObject.x && segment.y == gameObject.y) {
                eatSelf = true;
                return eatSelf;
            }
        }
        return eatSelf;
    }

Nishant Bhatia

Level 13 , Navi Mumbai, India

14 August 2019, 16:58

public void move(Apple apple) {
        GameObject newHead = createNewHead();
        boolean checkCol = checkCollision(newHead);
        if(checkCol) isAlive = false;
        else if ((newHead.x<0) || (newHead.y<0) || (newHead.x==15) || (newHead.y==15) ) isAlive=false;
        else {
            snakeParts.add(0, newHead);
            if (apple.x == newHead.x && apple.y == newHead.y) apple.isAlive = false;
            else removeTail();
        }
    }
    public boolean checkCollision(GameObject gameObject)
    {
        for (GameObject n :snakeParts) {
            if(n.y == gameObject.y && n.x == gameObject.x)
                return true;


        }
        return false;
    }

Refer my move, check collision method. See if you can figure out the mistake.