Passing List<String> to String... parameter
You'll have to convert the List<String> to a String array in order to use it in the 'varargs' parameter of dummyMethod. You can use toArray with an extra array as parameter. Otherwise, the method returns an Object[] and it won't compile:
List<String> names = getNames();dummyMethod(names.toArray(new String[names.size()]));
You can do the following :
dummyMethod(names.toArray(new String[names.size()]) this will convert the list to array
Pass String array (String[]) inside method. You will have to convert your List to Array and then pass it.
if (names != null) { dummyMethod(names.toArray(new String[names.size()])); }