Question

How can I call a function which accepts unknown number of String inputs (e.g. void func(String... strs)) with a given String array (String[])?

Answer 1

Varargs arguments are in fact arrays. Given this method:

void func(String... strs);

Calling it is simple (the following are the same):

func("a", "b", "c");
func(new String[] { "a", "b", "c" });

The method implementation can then do things, such as:

void func(String... strs) {
  System.out.println("Array length:  " + strs.length);
  System.out.println("Array content: " + strs[0]);
}

Understand that varargs arguments are just syntactic sugar for call-site convenience.