题解 | #坐标移动#

import java.util.Scanner;
import java.lang.Integer;
import java.lang.Character;

// 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) {
        //赋初始值，x、y坐标均为0
        int x = 0, y = 0;
        Scanner in = new Scanner(System.in);
        //读取字符串
        String str = in.nextLine();
        //分割成字符串数组，分隔符为;（注意是半角符号）
        String[] operations = str.split(";");
        //遍历字符串数组，无效的不处理，有效的将x、y坐标进行加减
        //每个字符串item，1.不为空，2.首字母应为ADWS其中之一
        //3.首字母之后的字符串应为1或2位的数字
        for (String operation : operations) {
            if (operation.isEmpty()) {
                continue;
            }

            char direction = operation.charAt(0);
            if (direction != 'A'
                    && direction != 'D'
                    && direction != 'W'
                    && direction != 'S'
               ) {
                continue;
            }

            String steps = operation.substring(1);
            int stepsLen = steps.length();
            if (stepsLen != 1 && stepsLen != 2) {
                continue;
            }

            boolean allDigit = true;
            for (int i = 0; i < stepsLen; i++) {
                if (!Character.isDigit(steps.charAt(i))) {
                    allDigit = false;
                    break;
                }
            }

            if (!allDigit) {
                continue;
            }

            int intSteps = Integer.parseInt(steps);

            switch (direction) {
                case 'A':
                    x -= intSteps;
                    break;
                case 'D':
                    x += intSteps;
                    break;
                case 'W':
                    y += intSteps;
                    break;
                case 'S':
                    y -= intSteps;
                    break;
                default:
                    break;
            }

        }
        System.out.print(x + "," + y);
    }

}