题解 | #坐标移动#

本题我用的是笨方法，一个个判断 这里主要是判断第二个字符是不是数字，用了Character.isDigit();

public class Main{
    public static Map<Character,Character> map = new HashMap<Character,Character>()
    {{
        put('A','-');
        put('D','+');
        put('W','+');
        put('S','-');
    }};

    public static void main(String[] args){
        Scanner in = new Scanner(System.in);
        StringBuffer row = new StringBuffer();
        int rowNum = 0;
        StringBuffer col = new StringBuffer();
        int colNum = 0;
        String s = in.nextLine();
        String[] split = s.split(";");
        boolean flag = false;
        for(int i=0; i<split.length; i++){
            if(split[i] == null || split[i] == "" || split[i].length()>3 || split[i].length() <2){
                continue;
            }
            char ac = split[i].charAt(0);//获取第一个字符  如果不是字符 就下一个
            if(!map.containsKey(ac)){
                continue;
            }else{
                char c = map.get(ac);
                if(ac == 'A' || ac == 'D'){
                    row.append(c);
                }else if(ac == 'W' || ac == 'S'){
                    col.append(c);
                }
                //已经判断第一个是字符  开始判断后面还有没有，
                for(int j=1; j<split[i].length(); j++){
                    char lin = split[i].charAt(j);
                    if(!Character.isDigit(lin)){
                        flag = true;
                        break;
                    }else{
                        if(ac == 'A' || ac == 'D'){
                            row.append(lin);
                        }else if(ac == 'W' || ac == 'S'){
                            col.append(lin);
                        }
                    }
                }
                if(row.length() <= 1  || flag) {
                    row = new StringBuffer();
                    flag = false;
                }else{
                    rowNum += Integer.parseInt(row.toString());
                }
                if(col.length() <= 1 || flag){
                    col = new StringBuffer();
                    flag = false;
                }else{
                    colNum += Integer.parseInt(col.toString());
                }
                row = new StringBuffer();
                col = new StringBuffer();
            }
        }
        System.out.println(""+rowNum+","+colNum);

    }
}