题解 | 坐标移动

import java.util.Scanner;

// 注意类名必须为 Main, 不要有任何 package xxx 信息
public class Main {
    public static void main(String[] args) {
        //获取指令集
        Scanner scanner = new Scanner(System.in);
        String instructionSet = scanner.nextLine();
        //初始化角色位置 和 指令集指针
        int x = 0, y = 0;
        int i = 0;
        //截取单个指令
        while (i < instructionSet.length()) {
            int start = i;
            while (instructionSet.charAt(i) != ';') {
                i++;
            }
            String instration = "";
            try {
                instration = instructionSet.substring(start, i);
            } catch (Exception e) {

            }//此时获取单个指令 注意：这里如果指令集没有;则会报异常
            i++;//跳过单个指令的结束条件 并继续处理单个指令 并且为获取下次指令做准备
            if (instration.length() >= 2 && instration.length() <= 3 &&
                    instration.substring(1,
                                         instration.length()).matches("\\d+")) { //判断是否满足标准0-99?但是现在如果是字符的话 长度判断不出来
                char direction = instration.charAt(0); //获取方向
                int stepNumber = 0;
                try {
                    if (instration.length() == 3) {
                        stepNumber = Integer.parseInt(instration.substring(1, 3)); //获取步数
                    } else {
                        stepNumber = Integer.parseInt(instration.substring(1, 2)); //获取步数
                    }
                } catch (Exception e) {

                }
                switch (direction) {
                    case 'A':
                        x -= stepNumber;
                        break;
                    case 'S':
                        y -= stepNumber;
                        break;
                    case 'W':
                        y += stepNumber;
                        break;
                    case 'D':
                        x += stepNumber;
                        break;
                }
            } else {
            }
        }
        System.out.println(x + "," + y);
    }
}