Projects
Assignments
Overview
The course helps participants to learn functional programming with lambdas and streams, as well as the Java Platform Module System (JPMS). UML, Design Patterns, and the use of composition versus inheritance are taught, as is unit testing.
Objectives
At the end of Advanced Java training course, participants will be able to
Solidify their Java foundational knowledge, including the important contracts of class Object
Understand the uses and consequences of inheritance and composition, and reinforce the role of interfaces
Leverage fundamental OO principles such as cohesion, coupling, and polymorphism
Use the JUnit testing framework and become fluent in writing assertions to verify correct program behavior
Understand UML modeling in class diagrams and sequence diagrams
Use advanced techniques for object creation, including factories and singletons
Use established design patterns for object composition, including Strategy, Decorator, and Facade
Write and use generic classes and methods
Leverage the use cases for inner classes and refactor existing code to use them when appropriate
Create and use custom annotations
Use reflection and how to use it
Understand the role of functional interfaces
Understand lambda expressions and method references, and use them to pass behavior (methods)
Use the Stream API to perform complex processing of collections and other input sources
Create and use Java modules, understanding module descriptors, modular JARs, exports and dependencies, and the modulepath
Understand the structure and behavior of the modular JDK, and how it supports modular applications as well as legacy classpath-based code
Prerequisites
All participants must have a working knowledge of Java programming, including the use of inheritance, interfaces, and exceptions.
Course Outline
- Java Release Cycle
- New Java Versions
- Java Environment
- Classes and Objects
- Instance Variables, Methods, Constructors, Static Members
- OO Principles: Data Encapsulation, Cohesion
- Object Contracts: toString(), equals() and hashCode(), Comparable and Comparator
- Packages, Enums, Arrays
- Exceptions
- Date and Time API
- New Language Features
- UML Overview
- Inheritance
- Definition and IS-A Relationship
- Method Overriding, @Override
- OO Principles: Principle of Substitutability, Polymorphism and Encapsulation of Type, Coupling, Open-Closed Principle
- Constructor Chaining
- Interfaces
- Defining and Implementing, Interface Types
- Interface Inheritance
- New Interface Features (Java 8+)
- Default Methods, Static Methods
- Functional Interfaces
- Guidelines
- Overview
- Tests, Assertions, and Fixtures
- Writing and Running Tests
- Assertions
- Test Fixtures, @Before and @After, @BeforeClass and @AfterClass
- Testing for Exceptions
- Best Practices and Test-Driven Development Overview (TDD)
- Collections Overview
- Generics and Type-Safe Collections
- Diamond Operator
- Lists, Sets, and Maps
- Interfaces and Contracts
- Iteration and Autoboxing
- Utility Classes – Collections and Arrays
- Writing Generic Classes
- Inheritance with Generic Types
- Wildcard Parameter Types
- Type Erasure
- Design Patterns Overview
- Controlling Object Creation
- Limitations of new Operator, Alternative Techniques
- Singleton Pattern
- Simple Factory
- Factory Method Pattern
- Other Techniques
- Named Objects, JNDI
- Dependency Injection Frameworks
- Inheritance and Composition – Pros and Cons
- Composition and Delegation
- HAS-A, USES Relationships
- Strategy Pattern
- Decorator Pattern
- Façade and Other Patterns
- Façade, Proxy, Template Method
- Overview and Motivation
- Stronger Encapsulation, Rules and Caveats
- Defining and Using Inner Classes
- Member-Level, Method-Local, Anonymous Classes
- Static Nested Classes
- Nested Classes, Nested Interfaces, Nested Enums
- Overview
- Using Annotations
- Target and Retention Policy
- Annotation Parameters, Parameter Shortcuts
- Writing Custom Annotations
- Syntax, Using the Meta-Annotations
- Using a Custom Annotation
- Overview and API
- The Class Called Class
- Obtaining and Inspecting Class Objects
- Working with Objects Reflectively
- Creating Instances, Invoking Methods, Setting Field Values
- Functional Interfaces and Lambdas
- Target Context
- Using Lambda Expressions
- Syntax, Lambda Compatibility
- Variable Capture
- Type Inference
- Method References
- Three Types of Method References
- Refactoring Lambdas into Method References
- Overview
- Streams vs. Collections
- Anatomy of a Stream
- Understanding the Stream API
- Intermediate Operations and Stream Pipeline
- Java 8 Functional Interfaces: Predicate, Comparator, Function
- Stream Processing
- Filtering, Sorting, Mapping
- Terminal Operations
- Collectors
- Concepts
- Partitioning and Grouping
- Motivation and Overview
- Types of Modules
- Modular JDK
- Our Approach
- Defining and Using Modules
- Services
- Compatibility and Migration
