public static String join(Object[] args, String separator) {

		return join(args, separator, null);
	}
public static String join(Object[] args, String separator) {

		return join(args, separator, null);
	}
public static String join ( Object [ ] args , String separator ) { return join ( args , separator , null ) ; }
Joins array of objects into string, where items are separated
with a defined separator.

@param args      array of Object
@param separator to be used between elements
@return items joined into a single string
Joins array of objects into string where items are separated with a defined separator .