When default methods were introduced in Java 8, some developers thought they would be the same as abstract classes. That’s not true, however, because interfaces can’t have state. A default ...

In later version of Java Interfaces always contained only method declaration. We are not giving method definition in the interfaces because java did not allow multiple inheritance of classes. But in ...

This example will show you four different ways to implement this functional interface in your code — starting with how to use an actual class, and how to create very concise code with a lambda ...