Introduction to Programming

Ellipsis "..."

The separator ... (ellipsis) is used only for varargs:

int someMethod(int i, String s, int... k){  //k is an array with elements k[0], k[1], ...}

The preceding method can be called in any of the following ways:

someMethod(42, "abc");          //array k = nullsomeMethod(42, "abc", 42, 43);  //k[0] = 42, k[1] = 43int[] k = new int[2];k[0] = 42;k[1] = 43;someMethod(42, "abc", k);       //k[0] = 42, k[1] = 43

In Chapter 2, Java Language Basics, while talking about the main() method, we explained the concept of varargs (variable arguments) in Java.