CodeGym/Help with Java Tasks/Help ME

Level 31

Vijayawada

10.09.2019
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16comments

Help ME

Question about the task

Snake (Part 11/20)

Games, Level 0, Lesson 1

Resolved

Please Help

Let's add the ability to control our snake. To handle key presses, override the Game parent class's onKeyPress(Key) method. Depending on which key is pressed, set the appropriate direction of snake movement.

Bear in mind that a snake cannot instantly turn 180 degrees.

Requirements:

The SnakeGame class must override the Game parent class's onKeyPress(Key) method.
If Key.LEFT is passed to the onKeyPress(Key) method, you need to call the setDirection(Direction) method on the snake with Direction.LEFT as the argument.
If Key.RIGHT is passed to the onKeyPress(Key) method, you need to call the setDirection(Direction) method on the snake with Direction.RIGHT as the argument.
If Key.UP is passed to the onKeyPress(Key) method, you need to call the setDirection(Direction) method on the snake with Direction.UP as the argument.
If Key.DOWN is passed to the onKeyPress(Key) method, you need to call the setDirection(Direction) method on the snake with Direction.DOWN as the argument.
The Snake class's setDirection(Direction) method must not change the direction of snake movement if the method parameter is the opposite of the current direction.

package com.codegym.games.snake; import com.codegym.engine.cell.*; public class Apple extends GameObject { public boolean isAlive = true; private static final String APPLE_SIGN = "\uD83C\uDF4E"; public Apple(int x, int y) { super(x, y); } public void draw(Game game){ game.setCellValueEx(x,y, Color.NONE,APPLE_SIGN,Color.RED,75); } }

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Steve Bennett

Level 18 , Stoneleigh

22 February 2021, 17:26

For those who are looking at this and don't get answers that work for you like i just did, the trick is change your setDirection method not just the onKeyPress method.

KIN SOCHEAT

Level 34 , Phnom Penh, Cambogia

5 October 2019, 00:09

switch (key){

Satya Vath

Level 31 , Vijayawada, India

5 October 2019, 04:11

Got it

KIN SOCHEAT

Level 34 , Phnom Penh, Cambogia

15 September 2019, 08:44

Switch (Key){ case.LEFT: snake.setDirection(Direction.LEFT); break; case RIGHT: snake.setDirection(Direction.RIGHT);break; case DOWN: snake.setDirection(Direction.DOWN);break; case UP: snake.setDirection(Direction.UP);break; }

Satya Vath

Level 31 , Vijayawada, India

4 October 2019, 10:57

Not Working

KIN SOCHEAT

Level 34 , Phnom Penh, Cambogia

15 September 2019, 08:35

change your code to switch

KIN SOCHEAT

Level 34 , Phnom Penh, Cambogia

12 September 2019, 04:16

if (key == Key.LEFT) { snake.setDirection(Direction.LEFT); break; } else if (key == Key.RIGHT) { snake.setDirection(Direction.RIGHT);break; } else if (key == Key.DOWN) { snake.setDirection(Direction.DOWN);break; } else if (key == Key.UP) { snake.setDirection(Direction.UP);break; }

Satya Vath

Level 31 , Vijayawada, India

12 September 2019, 12:57

Showing Error No loop or Switch

Shashank Mishra

Level 18 , Panaji, India

10 September 2019, 16:07

boolean valid=(
            (this.direction!=Direction.UP || direction!=Direction.DOWN) &&
            (this.direction!=Direction.LEFT || direction!=Direction.RIGHT) &&
            (this.direction!=Direction.RIGHT || direction!=Direction.LEFT) &&
            (this.direction!=Direction.DOWN || direction!=Direction.UP)
            );
        if(valid)
        {
            this.direction=direction;
        }

Satya Vath

Level 31 , Vijayawada, India

10 September 2019, 16:09

TQ very much

Satya Vath

Level 31 , Vijayawada, India

10 September 2019, 16:12

Can You Share Your Code

Satya Vath

Level 31 , Vijayawada, India

10 September 2019, 16:20

I will check the result

Shashank Mishra

Level 18 , Panaji, India

10 September 2019, 16:39

my code will have code of further task ,therefore i have given you code that will help you pass this part of task

Satya Vath

Level 31 , Vijayawada, India

11 September 2019, 11:13

Can You Give Even Simpler Code

Shashank Mishra

Level 18 , Panaji, India

11 September 2019, 14:38

actually this is pretty simple but if you are facing any problem in understanding it do tell which part .I will help :)

Liliane Top

Level 17 , Amsterdam, Netherlands

29 February 2020, 13:14

I do not understand what you are trying to do here? It looks to me that every direction will give a false return? Could you please enlighten me? I am stuck here as well. I can not prevent the snake from moving in the opposite direction.