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Snake (Part 7/20)

Games, Level 0, Lesson 1

Resolved

Problems with enum and the setDirection method.

An object on the playing field can have one of two states: it can be alive (isAlive=true) or dead (isAlive=false).
For example, if the snake hits the edge of the playing field, it dies. The same thing happens to an apple when it is eaten by the snake. To store object state, create a boolean isAlive variable in the Apple and Snake classes. Modify the logic for drawing a snake so that dead snakes are red.

The snake can move in one of four directions. To indicate these directions, create a Direction enum with UP, RIGHT, DOWN, and LEFT fields.

And in the Snake class, create a direction field, which will store the current direction of movement. Let the snake initially move to the left. The snake's direction will be changed by the setDirection(Direction) method. Create it.

Requirements:

The Apple class must have a public boolean isAlive field that is initialized to true.
The Snake class must have a public boolean isAlive field that is initialized to true.
In the Snake class's draw(Game) method, replace all calls to the setCellValue(int, int, String) method with calls to the setCellValueEx(int, int, Color, String, Color, int) method using arguments (x, y, Color.NONE, HEAD_SIGN (or BODY_SIGN), <color of snake>, 75). If the snake is dead, its color must be Color.RED. Otherwise, any other color, for example, Color.BLACK.
There must be a public Direction enum with the following values: UP, RIGHT, DOWN, LEFT.
The Snake class must have a private Direction direction field that is initialized to Direction.LEFT when it is declared.
The Snake class must have a public setter for the direction field: setDirection(Direction), which assigns the passed value to the field.

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; 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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Nithin

Level 35 , Hyderabad, India

13 July 2019, 08:39

solution

#1: Remove the enum from line 13, you already have that in Direction.java file. #2: you haven't added setter for direction field in the snake class.