Functional InterfacesJ8 Home « Functional Interfaces

We start this lesson by looking at encapsulation, its advantages and how to achieve it within our code. We then look at the design principles of coupling and cohesion and describe the benefits of loose coupling and high cohesion. We then explain polymorphism and how we use it in the Java language before looking at object reference casting and determine when casting will be necessary whilst recognizing compiler vs. runtime errors, related to it. After this we examine the effect of modifiers on inheritance with respect to constructors, instance or static variables, and instance or static methods. We then look at code that declares and/or invokes overridden or overloaded methods and code that declares and/or invokes superclass or overloaded constructors. We finish the lesson by investigating code that implements "is-a" and/or "has-a" relationships.

Lets take a look at the points outlined at Oracle Java SE 8 Programmer II for this part of the certification.

Lambda Built-in Functional Interfaces
1. Use the built-in interfaces included in the java.util.function package such as Predicate, Consumer, Function, and Supplier.
2. Develop code that uses primitive versions of functional interfaces.
3. Develop code that uses binary versions of functional interfaces.
4. Develop code that uses the UnaryOperator interfaces.

Functional InterfacesJ8 Home « Functional Interfaces

Related Java Tutorials

Java 8 Certification Part I

Java 8 Certification Part II

Java Class Design

Generics and Collections

Java Stream API

Use Java SE 8 Date/Time API

Java File I/O (NIO.2)

Build Database Applications with JDBC

Advanced Java Class Design

Lambda Built-in Functional Interfaces

Exceptions and Assertions

Java I/O Fundamentals

Java Concurrency

Localization

Java Keywords

Java Glossary