In JAVA, the types are followed by three points.

Variable array parameters. If a parameter is used, it can be passed or not. If it is passed, it can be passed in parallel or directly an array.

In the method, s is an array. If nothing is passed during the call, the length of s is 0. The length of s is a few.

In addition, more than 1.5 support this function.
Write example:

View sourceprint? 01 public class ThreePoint {

02 public static void main (String [] args ){

03 printString ();

04 System. out. println ("=========== ");

05 printString (new String [] {"I", "and", "you "});

06 System. out. println ("=========== ");

07 printString ("I", "and", "you ");

08}

09

10 public static void printString (String... str ){

11 if (str. length = 0 ){

12 System. out. println ("No parameter is passed. ");

13}

14 for (int I = 0; I <str. length; I ++ ){

15 System. out. println (str [I]);

16}

17 System. out. println ("---------------------");

18 for (String s: str ){

19 System. out. println (s );

20}

21}

22

23}