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) {
        Scanner in = new Scanner(System.in);
        // 注意 hasNext 和 hasNextLine 的区别
        while (in.hasNext()) { // 注意 while 处理多个 case
            String str = in.next();
            movingCount(str);
        }
    }

    public static void movingCount(String stepStr) {
        int x = 0, y = 0;
        String[] split = stepStr.split(";");
        for (String s : split) {
            if (s.length() == 0)continue;
            char c = s.charAt(0);
            if (c == 'A' || c == 'D' || c == 'W' || c == 'S') {
                s = s.substring(1);
                //判断stepStr是否为数字
                if (s.matches("[0-9]+")) {
                    int step = Integer.parseInt(s);
                    switch (c) {
                        case 'A':
                            x -= step;
                            break;
                        case 'D':
                            x += step;
                            break;
                        case 'W':
                            y += step;
                            break;
                        case 'S':
                            y -= step;
                            break;
                    }
                }
            }
        }
        System.out.println(x + "," + y);
    }
}