private String stringJoin(String[] array, int count){
    String joined = "";
    for(int i = 0; i < count; i++)
      joined += array[i];
    return joined;
  }
Method to replace String.join, since it was only introduced in java8
@param array the array to be concatenated
@return concatenated String
src/main/java/com/vdurmont/emoji/Emoji.java