Very confused as the game is actually working

Question about the task

Snake (Part 14/20)

Games, Level 0, Lesson 1

Under discussion

Can any please help me. I do not understand at all why this is failing the test as it is working.

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 Apple extends GameObject { private static final String APPLE_SIGN = "\uD83C\uDF4E"; public boolean isAlive = true; public Apple(int x, int y) { super(x, y); } public void draw(Game game){ game.setCellValueEx(x, y, Color.NONE, APPLE_SIGN, Color.GREEN, 75); } }

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Stefan Maric

Level 22 , Frankfurt , Germany

21 April 2020, 13:16

Your checkCollision method is "too complicated" and you are not getting correct output. Change method to something like this: boolean collision = false; for(GameObject obj : snakeParts) { if(obj.x == object.x && obj.y == object.y) { collision = true; } } return collision;

Stefan Maric

Level 22 , Frankfurt , Germany

21 April 2020, 13:18

After that you will have to change your call in move method through condition that is stated in task conditions. If you need more help let me know, happy coding.