Abstract classes and interfaces in Java serve fundamentally different purposes. Learn the differences between these Java language elements and how to use them in your programs. Abstract classes ...

Anytime we pass an interface with a method implementation to another method in Java, we are using the concept of a callback function. In the following code, we will pass the Consumer functional ...

If you want to master functional programming, the best place to start is with the Java Function interface. This example will show you four different ways to implement this functional interface in your ...

Here is the functional Consumer interface example implemented using a somewhat verbose lambda expression: The functional Consumer interface is used extensively across the Java API, with a number of ...