Method Reference is a wonderful feature introduced in Java 8. Apart from taking advantage of functional programming, one of the biggest advantage in using a Lambda expression is to minimize the lines of code. Similarly, Method reference also minimizes lines of code even more than Lambda. However, we use both of them in the presence of functional interfaces only. Moreover, It is also a concise and simpler form of lambda expression. In this article, we will also learn how to change a Lambda expression into a method reference. Let's start discussing about 'Method Reference(::) Java 8' and it's related concepts.​ What is Method Reference(::) ? As we have seen in Lambda expression's topic that we use lambda expressions to implement Functional interfaces