This tutorial demonstrates the power of lambda expressions by contrasting implementations of a mathematical example using C++, Java without lambdas, and Java 8 with lambda expressions.

Like C# lambda expressions, Java 8 lambda expressions tie an argument list to a body. For example, (int x) -> x * x specifies an integer parameter that’s named x and returns the value of x squared.

In the previous two examples, an instance of the Integer class was passed to both the Function and the Consumer. The Supplier interface, however, isn’t passed anything. It simply generates a value ...

Lambda and Consumer interface example. As you can see, there is nothing special about the interfaces defined in the java.util.function package. They are regular Java interfaces that comply with all of ...