What does (String... arg) mean in a function definition?

Question

public static void main (String... arg)

I have never encountered the ... part in the function definition. Could anyone give some insight into this notation?

Answer 1

The ... indicates that you are passing 0 or more arguments of the type and the method will access them as an array of objects of the type. You may pass them as an array or as a sequence of objects of the declared type. I.e.:

In your main method use

String firstArg = arg[0];

to access the first argument.

Look at the documentation of varargs for more info.