IntStream.Builder add() method in Java

// Java code to show the implementation
// of IntStream.Builder add(int t)

import java.util.stream.IntStream;

class GFG {

    // Driver code
    public static void main(String[] args)
    {

        // Declaring an empty Stream
        IntStream.Builder b = IntStream.builder();

        // Inserting elements into the stream
        // using IntStream.Builder add(int t)
        b.add(4);
        b.add(5);
        b.add(6);
        b.add(7);

        // Creating the Stream
        // The stream has now entered the built phase
        // printing the elements
        System.out.println("Stream successfully built");
        b.build().forEach(System.out::println);
    }
}

// Java code to show the implementation
// of IntStream.Builder add(T t)

import java.util.stream.IntStream;

class GFG {

    // Driver code
    public static void main(String[] args)
    {

        // Declaring an empty Stream
        IntStream.Builder b = IntStream.builder();

        // using IntStream.Builder add(T t)
        b.add(4);
        b.add(5);
        b.add(6);
        b.add(7);

        // Creating the Stream
        // The stream has now entered the built phase
        // printing the elements
        System.out.println("Stream successfully built");
        b.build().forEach(System.out::println);

        // Trying to add another element into the stream
        // Since the Stream is in built phase
        // This operation is not possible now
        // Hence add() will throw exception now

        try {
            b.add(50);
        }
        catch (Exception e) {
            System.out.println("Exception thrown "
                               + "when now adding element into the stream: "
                               + e);
        }
    }
}