Snake in Java

Snake.java

class Vec2 {
    public int x = 0;
    public int y = 0;
    public Vec2(int p_x, int p_y) {
        this.x = p_x;
        this.y = p_y;
    }
    public Vec2 copy() {
        return new Vec2(this.x, this.y);
    }
}

enum Direction {
    up, down, left, right
}

class SnakeBodySegment {
    public int length;
    public Direction direction;
    public SnakeBodySegment(Direction p_direction, int p_length) {
        this.length = p_length;
        this.direction = p_direction;
    }
}

class Snake {
    public Vec2 head;
    public SnakeBodySegment[] body;
    public Snake(Vec2 p_head, SnakeBodySegment[] p_body) {
        this.head = p_head;
        this.body = p_body;
    }
    
    public void print(int width, int height) {
        char[][] buffers = new char[width][height];
        for (int i = 0; i < width; ++i) {
            for (int j = 0; j < height; ++j) {
                buffers[i][j] = ' ';
            }
        }
        
        
        Vec2 p = this.head.copy();
        buffers[p.x][height - p.y + 1] = '*';
        for (int iSegment = 0; iSegment < this.body.length; ++iSegment) {
            SnakeBodySegment segment = this.body[iSegment];
            for (int i = 0; i < segment.length; ++i) {
                switch(segment.direction) {
                    case up: --p.y; break;
                    case down: ++p.y; break;
                    case left: ++p.x; break;
                    case right: --p.x; break;
                }
                buffers[p.x][height - p.y + 1] = '.';
            }
            
        }
        
        for (int i = 0; i < width; ++i) {
            for (int j = 0; j < height; ++j) {
                System.out.print(buffers[j][i]);
            }
            System.out.println();
        }
    }
}

public class HelloWorld{

     public static void main(String []args){
         Snake snake = new Snake(
            new Vec2(20, 20),
            new SnakeBodySegment[]{
                new SnakeBodySegment(Direction.up, 5),
                new SnakeBodySegment(Direction.left, 8),
                new SnakeBodySegment(Direction.up, 3),
                new SnakeBodySegment(Direction.right, 4),
                new SnakeBodySegment(Direction.up, 2),
                new SnakeBodySegment(Direction.left, 9),
                new SnakeBodySegment(Direction.down, 9),
                new SnakeBodySegment(Direction.left, 2),
            }
         );
         snake.print(50, 50);
        System.out.println("Hello World");
     }
}