Java语言怎么实现跳跃的文字前进左转以后再返回

import java.util.Scanner;

public class JumpingText {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        System.out.print("请输入跳跃路径: ");
        String path = scanner.nextLine();

        int x = 0;  // 横坐标
        int y = 0;  // 纵坐标
        int direction = 0;  // 方向，0代表正上方，1代表正右方，2代表正下方，3代表正左方

        for (int i = 0; i < path.length(); i++) {
            char step = path.charAt(i);
            switch (step) {
                case 'F':  // 前进
                    if (direction == 0) {
                        y++;
                    } else if (direction == 1) {
                        x++;
                    } else if (direction == 2) {
                        y--;
                    } else if (direction == 3) {
                        x--;
                    }
                    break;
                case 'L':  // 左转
                    direction = (direction + 3) % 4;
                    break;
                case 'R':  // 右转
                    direction = (direction + 1) % 4;
                    break;
                case 'B':  // 返回
                    if (direction == 0) {
                        y--;
                    } else if (direction == 1) {
                        x--;
                    } else if (direction == 2) {
                        y++;
                    } else if (direction == 3) {
                        x++;
                    }
                    break;
                default:
                    System.out.println("无效的路径指令: " + step);
            }
        }

        System.out.println("最终位置: (" + x + ", " + y + ")");
    }
}