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Question about the task

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why is this part of my code causing problems and saying illegal start of expression for public void move (Apple apple) ? im really lost (im referring to the commented part in the Snake class inside the setDirection method)

Just some final touches remain — keeping score and displaying points earned. To keep score, create a score variable and set it to 0 when a new game is created.

Use the setScore(int) method to display the score on the screen. Call it after every change to the score variable. The score should increase by 5 after each apple is eaten.

After each apple is eaten, the game speed must increase, i.e. decrease the value of turnDelay (the duration of a turn) by 10. After each change to turnDelay, the setTurnTimer(int) method must be called.

Requirements:

The SnakeGame class must have a private int score field.
The score field must be initialized to 0 in the createGame() method.
The createGame() must call the setScore(int) method with score as the argument.
The onTurn(int) method must increase the score field by 5 if the apple is dead.
The onTurn(int) method must call the setScore(int) method with score as the argument if the apple is dead.
The onTurn(int) method must reduce the value of the turnDelay field by 10 if the apple is dead.
The onTurn(int) method must call the setTurnTimer(int) method with turnDelay as the argument if the apple is dead.

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 static final int GOAL = 28; private Snake snake; private Apple apple; private int turnDelay; private boolean isGameStopped; @Override public void initialize() { setScreenSize(WIDTH, HEIGHT); createGame(); } private void createGame(){ turnDelay = 300; setTurnTimer(turnDelay); snake = new Snake(WIDTH/2, HEIGHT/2); createNewApple(); isGameStopped = false; drawScene(); } private void drawScene(){ for (int x = 0; x < WIDTH; x++){ for (int y = 0; y < HEIGHT; y++){ setCellValueEx(x, y, Color.DARKGREEN, ""); } } snake.draw(this); apple.draw(this); } private void createNewApple(){ Apple newApple; do { int x = getRandomNumber(WIDTH); int y = getRandomNumber(HEIGHT); newApple = new Apple(x, y); } while (snake.checkCollision(newApple)); apple = newApple; } @Override public void onTurn(int go){ snake.move(apple); if (apple.isAlive == false){ createNewApple(); } if (!snake.isAlive){ gameOver(); } if (snake.getLength() > GOAL){ win(); } drawScene(); } @Override public void onKeyPress(Key key){ if (key == Key.SPACE && isGameStopped == true){ createGame(); } if (key == Key.LEFT){ snake.setDirection(Direction.LEFT); } else if (key == Key.RIGHT){ snake.setDirection(Direction.RIGHT); } else if (key == Key.DOWN){ snake.setDirection(Direction.DOWN); } else if (key == Key.UP){ snake.setDirection(Direction.UP); } } private void gameOver(){ stopTurnTimer(); isGameStopped = true; showMessageDialog(Color.NONE, "GAME OVER!", Color.RED, 50); } private void win(){ stopTurnTimer(); isGameStopped = true; showMessageDialog(Color.WHITE, "u win!", Color.BLUE, 50); } }

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Guadalupe Gagnon

Level 37 , Tampa, United States

24 June 2024, 03:48

Two problems with the commented code: 1) you are missing a closing curly bracket at the end of the second if statement. The compiler gets lost on these and wont be able to determine where methods start and end. This is why it is saying there is a problem with the move(Apple apple) method when you uncomment the code. 2) the single equals sign is an assignment operator. This will set the value of the object on the left to the value on the right. So this part: snakeParts.get(0).x = snakeParts.get(1).x is setting snakeParts.get(0).x to the value of snakeParts.get(1).x. This makes no sense with the if statement with logical AND. You need to use the double equals operator, which is the equality operator that checks if the operand on the left is the same as the operand on the right. Be careful when you are checking objects with this operator because it will check that they have the same reference and not if they are objects with the same values.