method does not override or implement a method from a supertype @Override

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i got the error : method does not override or implement a method from a supertype @Override I don't know what is my mistake .It' like i have a non-existing method of the parent class Game overriden , but i did exactly as demanded.

The snake must move with every turn. A turn takes a certain amount of time, which you can set.

To implement the logic for moving the snake, create a move() method in the Snake class. Override the onTurn(int) method of the parent of the SnakeGame class. Everything that should happen in the game during one turn is described here. After moving the snake, don't forget to redraw the playing field.

To set the duration of a turn, create a turnDelay variable. The game will start at a speed of 300ms/turn. Set the duration of a turn when the game is created.

Requirements:

The Snake class must have a public void move() method.
The SnakeGame class must override the Game parent class's onTurn(int) method.
The move() method must be called on the snake object in the onTurn(int) method.
In the onTurn(int) method, the drawScene() method must be called after the call to snake.move().
There must be a private int turnDelay variable in the SnakeGame class.
The turnDelay field must be initialized to 300 in the createGame() method.
The setTurnTimer(int) method must be called in the createGame() method. Pass turnDelay as the argument.

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; @Override public void initialize() { setScreenSize(WIDTH, HEIGHT); createGame(); } private void createGame(){ turnDelay=300; snake= new Snake(WIDTH/2,HEIGHT/2);//why should the snake be intialized //before drawing the Scene ? drawScene(); //Apple apple = new Apple(7,7); //apple.draw(this);//this tarje3 3al class mta3 apple (Apple) setTurnTimer(turnDelay); } private void drawScene(){ for (int i = 0; i < WIDTH; i++) { for (int j = 0; j < HEIGHT; j++) { setCellColor(i, j, Color.GRAY); } } snake.draw(this);//this here refers to the snake class(Snake) } //the requirements said : this method should be overriden but the compiler said //there is no such function in super class @Override public void OnTurn(int step){ //Everything that should happen in the game during one turn is described here snake.move(); drawScene();// drawScene() after every move ? } }

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Sakka Mouid

Level 19 , Hannover, Deutschland

29 April 2022, 04:22

I just feel sometimes that the compiler has problems , because everything is like the solution , different code , same function !

Lisa L

Level 47 , Nuremberg, Germany

29 April 2022, 08:30

solution

That's a helpful message for you... or at least it is meant to be a help. The @Override annotation just outputs that hint when the method you want to override does not exist in one of the partent classes. Without that you'd be able to create the new method but your code would probably invoke the partent class method leading to strange behaviour. Here you annotated OnTurn(int step) with @Override -> compare that with the parent methods signature (given by CG) onTurn(int) -> then we see there is a difference onTurn != OnTurn perfect, the warning did its work and you corrected your typo