Snake.java

import java.util.*;

public class Snake {
    static int width;
    static int height;
    static boolean gameover=false;
    static int foodx;
    static int foody;
    static Random rand = new Random();
    
    static List<int[]> snake=new ArrayList<>();

    static int dx = 1;
    static int dy = 0;
    static int score=0;    
    public static void main(String[] args) throws Exception {
        Scanner sc = new Scanner(System.in);
        System.out.println("Enter board width"); 
        width=sc.nextInt();
        System.out.println("Enter board height"); 
        height=sc.nextInt();
        foodx =rand.nextInt(width);
        foody=rand.nextInt(height);
        int sy=height/2;
        int sx=width/2;
        snake.add(new int[]{sy,sx});
        

        while (!gameover) {
            drawBoard();

            System.out.print("Move (u/d/l/r): ");
            String input = sc.nextLine();

            if (input.equals("u")) {
            dx=0; 
            dy=-1;}
            if (input.equals("d")) {
            dx=0;
            dy=1;
            }
            if (input.equals("l")) {
            dx=-1;
            dy=0;
            }
            if (input.equals("r")){
            dx=1;
            dy=0;}
            int head[]=snake.get(0);
            int newx=head[1]+dx;
            int newy=head[0]+dy;
            for(int[] part : snake){
            if(part[0]==newy && part[1]==newx)
            {gameover=true;
            }}
            snake.add(0,new int[]{newy,newx});
            if(newx<0||newx>=width||newy<0||newy>=height)
           { gameover=true;}
           if(newx==foodx && newy==foody)
          { score++;
          do {foodx =rand.nextInt(width);
          foody=rand.nextInt(height);
          }while(foodx==sx && foody==sy);
        } else 
        snake.remove(snake.size()-1);}
       System.out.print("Game over"); 
    }

    static void drawBoard() {
        // Clear screen
        System.out.print("\033[H\033[2J");
        System.out.flush();
        System.out.println("Score"+score); 

        for (int i = 0; i < height; i++) {
            for (int j = 0; j < width; j++) {
            
                boolean printed = false;

            for (int[] part : snake) {
                if (part[0] == i && part[1] == j) {
                    System.out.print("O ");
                    printed = true;
                    break;
                }
            }

            if (!printed) {
                if (i == foody && j == foodx) {
                    System.out.print("X ");
                } else {
                    System.out.print(". ");
                }
            }

        }
        System.out.println(); 
    }
}}