comefrom: <qiyuangong>751_IP_to_CIDR_2.java
code: private String longToIP(long x) {
          return String.format("%s.%s.%s.%s",
              x >> 24, (x >> 16) % 256, (x >> 8) % 256, x % 256);
      }
masked: private String var_0 ( long var_1 ) {
    return String . format ( "%s.%s.%s.%s" , var_1 >> 24 , ( var_1 >> 16 ) % 256 , ( var_1 >> 8 ) % 256 , var_1 % 256 ) ;
  }
  