Introduction to Programming

The toArray() operation

These two Terminal operations generate an array that contains the stream elements:

• Object[] toArray() : Creates an array of objects; each object is an element of this stream.
• A[] toArray(IntFunction<A[]> generator): Creates an array of the stream elements using the provided function.

Let's look at an example:

List<String> list = List.of("a", "b", "c");Object[] obj = list.stream().toArray();Arrays.stream(obj).forEach(System.out::print);    //prints: abcString[] str = list.stream().toArray(String[]::new);Arrays.stream(str).forEach(System.out::print);    //prints: abc

The first example is straightforward. It converts elements to an array of the same type. As for the second example, the representation of IntFunction as String[]::new ...