How to pass an ArrayList to a varargs method parameter?

Source article: Passing a list as an argument to a vararg method

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Use the toArray(T[] arr) method.

.getMap(locations.toArray(new WorldLocation[0]))

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Here’s a complete example:

public static void method(String... strs) {
    for (String s : strs)
        System.out.println(s);
}

...
    List<String> strs = new ArrayList<String>();
    strs.add("hello");
    strs.add("world");
    
    method(strs.toArray(new String[0]));
    //     ^^^^^^^^^^^^^^^^^^^^^^^^^^^
...