leetcode401 二进制手表问题

https://leetcode-cn.com/problems/binary-watch/

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class Solution {     public List<String> readBinaryWatch(int turnedOn) {         List<String> result = new ArrayList<String>();         for(int counthour = 0; counthour < 12; counthour++) {             for(int countminute = 0; countminute < 60; countminute++) {                 if(Integer.bitCount(counthour) + Integer.bitCount(countminute) == turnedOn){                     result.add(counthour + ":" + (countminute>=10 ? "" : "0" ) + countminute);                 }             }         }         return result;     } }