Reshma Bidikar

In this blog post, I will be explaining how the Java 8 functional interface IntSupplier works. To know more about functional interfaces, you can refer this blog post.

The IntSupplier interface provides a method called getAsInt This method does not accept any arguments. It returns an Int data type. The IntSupplier interface is a specialization of the Supplier interface that returns an int. To see an example of the Supplier interface, refer to this blog post.

IntSupplier example

Consider the following code snippet:

public class IntSupplierDemo {

    public static void main(String[] args) { 
        IntSupplier getRandom = () -> new Random().nextInt(100); 
        System.out.println("Random number 1 = "+getRandom.getAsInt()); 
        System.out.println("Random number 2 = "+getRandom.getAsInt()); 
    }
}

Here, we have implemented the IntSupplier.getAsInt method using a lambda expression. This getAsInt method simple returns a random integer less than 100. So when this code is executed, it will print the following output:

Random number 1 = 98 
Random number 2 = 89

You can get the source code for this example along with other code for other Java 8 examples at the Github repositoryhere.