第六五七题_机器人能否返回原点

class Solution {
    public boolean judgeCircle(String moves) {
       int x =0, y = 0 ;
       char[] chars = moves.toCharArray();
       for (int i = 0; i < chars.length; i++) {
           if(chars[i]  == 'U'){
               y++;
           }
           if(chars[i]  == 'D'){
               y--;
           }
           if(chars[i]  == 'L'){
               x--;
           }
           if(chars[i]  == 'R'){
               x++;
           }
       }
       if(x == 0 && y == 0){
           return true;
       }
       return false;
    }
}