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Snake (Part 18/20)

Games, Level 0, Lesson 1

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Tried and copied and tried but no idea what is actually requested. Where do I go wrong in my thinking?

Let's fix our snake control. The direction field can only be changed to currently valid values: LEFT, RIGHT, UP, and DOWN.

Requirements:

The Snake class's setDirection(Direction) method must not do anything if the value of the direction field is LEFT, and the snake segments with indices 0 and 1 in the snakeParts list have the same x coordinate.
The Snake class's setDirection(Direction) method must not do anything if the value of the direction field is RIGHT, and the snake segments with indices 0 and 1 in the snakeParts list have the same x coordinate.
The Snake class's setDirection(Direction) method must not do anything if the value of the direction field is UP, and the snake segments with indices 0 and 1 in the snakeParts list have the same y coordinate.
The Snake class's setDirection(Direction) method must not do anything if the value of the direction field is DOWN, and the snake segments with indices 0 and 1 in the snakeParts list have the same y coordinate.

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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Roman

Level 41

5 March 2020, 05:42

useful

switch(direction){
           case LEFT://if the value of the directionfield is left
               if(direction!= Direction.RIGHT || direction == Direction.LEFT && snakeParts.get(0).x != snakeParts.get(1).x) direction = this.direction;
               if(direction == Direction.LEFT && snakeParts.get(0).x == snakeParts.get(1).x) return;
              // if (direction == Direction.LEFT &&  direction = this.direction;

               break;

I think you have an error here.. You checked direction in the switch (case LEFT) and in the if statement (direction!= Direction.RIGHT)

Liliane Top

Level 17 , Amsterdam, Netherlands

5 March 2020, 07:37

Hi Roman, thanks so much for taking your time. The problem was actually that the condition was incorrect in my switch statement. switch(direction) => switch(this.direction) that solved one error And the other one is that the code can be shortened into just 1 if statement per case => case LEFT: if(direction != Direction.RIGHT && snakeParts.get(0).x != snakePart.get(1).x) this.direction = direction; I struggled with this for many days and someone in my class finally took the time to help me out. And I really appreciate you taking the time to respond!