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After kick-starting the Advanced Java course by discussing how to How to create and destroy objects and how to use methods common to all objects, we are now going a step further.

In this lesson we will delve into the foundational building blocks which the Java language provides and introduce a couple of design principles, aiming to help you to make better design decisions.

We are going to discuss interfaces and interfaces with default methods (new feature of Java 8), abstract and final classes, immutable classes, inheritance, composition and revisit a bit the visibility (or accessibility) rules we have briefly touched.

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