Java坐标计算工具---牛客原题

import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        while (scanner.hasNext()) {
            String str = scanner.nextLine();
            //以 “；”为界分割字符串
            String[] strings = str.split(";");
            int x = 0, y = 0;
            for (String string : strings) {
                if (string.length() > 0) {
                    char char1 = string.charAt(0);
                    //判断输入的第一个字母是否为 W S  A D
                    if (char1 != 'W' && char1 != 'S' && char1 != 'A' && char1 != 'D') {
                        continue;
                    }
           String str2 = string.substring(1, string.length());
           char[] chars2 = str2.toCharArray();

            boolean judge = true;
            //判断除首字母外的是否为数字
            for (char aChars2 : chars2) {
                if (aChars2 < 48 || aChars2 > 57) {
                    judge = false;
                }
            }
            if (!judge) {
                continue;
            }
            //判断命令
            switch (char1) {
                case 'W':
                    y += Integer.parseInt(str2);
                    break;
                case 'S':
                    y -= Integer.parseInt(str2);
                    break;
                case 'A':
                    x -= Integer.parseInt(str2);
                    break;
                case 'D':
                    x += Integer.parseInt(str2);
                    break;
                default:
                    break;
            }
        }
    }
    System.out.println(x + "," + y);
		}
	}
}