Stream.toList()

Definition

Stream.toList() (Java 16) ends a stream with an unmodifiable list, so you no longer write collect(Collectors.toList()) for the common case.

Example code

A shorter way to finish a stream

import java.util.List;

class Demo {
    public static void main(String[] args) {
        List<String> names = List.of("asha", "ravi", "meera").stream()
                .map(String::toUpperCase)
                .toList();                                    // Java 16

        System.out.println(names);
        try {
            names.add("JO");
        } catch (UnsupportedOperationException e) {
            System.out.println("the list is unmodifiable");
        }
    }
}

// Output:
// [ASHA, RAVI, MEERA]
// the list is unmodifiable