Abstract classes and interfaces in Java serve fundamentally different ... which we’ll use to implement the methods in the interface using a concrete class. Remember that an interface is a ...

Learn the four types of polymorphism in Java ... class might declare fields describing its make, model, and year. Also, it might declare a constructor to initialize these fields and concrete ...

A common idea behind all IoC containers and manual DI solutions is that the dependency is resolved in a very few well-known and dedicated places – XML configuration files (Spring IoC), special Java ...