Interfaces just got much better in Java 8
We all know that Interface contains methods and variables, but the methods declared in an interface are by default abstract (only method signature nobody).If a class is implementing an interface it must provide method implementation of the methods in the interface, otherwise, the class must be declared as abstract. Now imagine a situation where you want to add a new method to an interface later.Modifying one interface breaks all classes that implement the interface.which means adding a single method can break millions of lines of code. In order to address this problem, Java8 introduced "Default Method" or Defender methods, which allows the user to enter a new method in the interface without breaking existing implementation of these interfaces.It provides flexibility to allow Interface define implementation which will use as default in the situation where a concrete C...