Object-Oriented Hierarchies in Java

This course is part of Core Java Specialization

Instructor: LearnQuest Network

Access provided by INEFOP - Instituto Nacional de Empleo y Formación Profesional de Uruguay

22,138 already enrolled

6 modules

Gain insight into a topic and learn the fundamentals.

213 reviews

Intermediate level

Recommended experience

Flexible schedule

1 week at 10 hours a week

Learn at your own pace

94%

Most learners liked this course

6 modules

Gain insight into a topic and learn the fundamentals.

213 reviews

Intermediate level

Recommended experience

Flexible schedule

1 week at 10 hours a week

Learn at your own pace

94%

Most learners liked this course

Skills you'll gain

Tools you'll learn

Java Programming

Details to know

Shareable certificate

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Assessments

13 assignments

Taught in English

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This course is part of the Core Java Specialization

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There are 6 modules in this course

Object-Oriented Hierarchies in Java is the third of a series of courses in the Core Java Specialization. The Core Java Specialization is part of a series of programming specializations, derived from LearnQuest's private Java Bootcamps, designed to provide the skill set necessary to be hired as an IT developer using Java in many corporate environments.

This course includes hands-on practice and will help you build on your knowledge of the Java language. After completing this course, you will have a deeper understanding of how to effectively implement and use inheritance and polymorphism in Java. To be successful in this course, you should have taken: - Course 1: Introduction to Java - Course 2: Introduction to Object-Oriented Programming with Java or have equivalent knowledge.

In this video, we will introduce you to this course and explain what you will learn.

What's included

1 video2 readings

This module foreshadows the entire course, covering O-O Relationships, Inheritance, Polymorphism, Interfaces, Aggregation, and Design Guidelines. The following modules revisit selected topics in more detail.

What's included

11 videos5 readings2 assignments2 ungraded labs1 plugin

11 videos Total 56 minutes

Introduction to Relationships in O-O 3 minutes
Inheritance Example 2 minutes
Inheritance Example - Demo 6 minutes
Polymorphism 10 minutes
Experience the Lab Environment 3 minutes
Inheritance 7 minutes
Implementing the Cargo Class 5 minutes
Association 3 minutes
Class Hierarchies 8 minutes
Finding Classes 6 minutes
Nouns and Verbs 3 minutes

5 readings Total 88 minutes

Importing Lab Starters and/or Solutions 10 minutes
CRC Cards 30 minutes
UML 30 minutes
Steering the Hierarchy 8 minutes
Remember This: OO Programming Relationships 10 minutes

2 assignments Total 40 minutes

Interfaces and Association - Knowledge Check 10 minutes
Review Assessment 30 minutes

2 ungraded labs Total 75 minutes

Experience the Lab Environment 15 minutes
Create the SUV Class 60 minutes

1 plugin Total 4 minutes

Activity: IS-A and HAS-A 4 minutes

This module goes into more detail on implementing class inheritance in Java, including overriding methods, invoking overridden parent methods using super, and more.

What's included

13 videos2 readings4 assignments3 ungraded labs

13 videos Total 61 minutes

Review of Inheritance 3 minutes
java.lang.Object 4 minutes
A look at the JavaDoc 2 minutes
Implementing equals and hashCode methods 5 minutes
Implementing the toString method 3 minutes
Inheritance in Java 4 minutes
Overloading and Overriding 6 minutes
Overriding Example 3 minutes
Constructors 6 minutes
Challenges 4 minutes
Challenges: Mistakes and Solution 4 minutes
Lab Solution Summary 5 minutes
Lab Solution Summary 12 minutes

2 readings Total 17 minutes

Extending the System 8 minutes
Remember This: Inheritance 9 minutes

4 assignments Total 52 minutes

Inheritance Review and java.lang.Object - Knowledge Check 10 minutes
Untitled 6 minutes
Inheritance Challenges and Labs - Knowledge Check 6 minutes
Review Assessment 30 minutes

3 ungraded labs Total 30 minutes

Working with Inheritance 10 minutes
Creating an Inventory System - Part 1 10 minutes
Creating an Inventory System - Part 2 10 minutes

This module discusses Abstract classes, including what they are; where you might use them; how to implement them; and concludes with discussion of casting, which is the technique of taking a reference of a given type, and asserting a different type.

What's included

11 videos2 readings2 assignments1 ungraded lab

11 videos Total 59 minutes

Abstract Classes - Why and When? 6 minutes
Abstract Classes Demo 6 minutes
Syntax Review 2 minutes
Design Decisions 3 minutes
Abstract Classes and Reference Types 9 minutes
Using Abstract References 5 minutes
Polymorphic Code 4 minutes
Casting 9 minutes
Upcasting 5 minutes
Downcasting 4 minutes
Lab Solution Summary 6 minutes

2 readings Total 17 minutes

The Unfinished Blueprint 8 minutes
Remember This: Abstract Classes 9 minutes

2 assignments Total 40 minutes

Using Abstract Classes 10 minutes
Review Assessment 30 minutes

1 ungraded lab Total 10 minutes

Extending the Inventory System 10 minutes

Interfaces are the key to polymorphism in Java, since Java requires inheritance in order to implement polymorphism, and classes are limited to the single inheritance graph. This module goes into more detail on interfaces and polymorphism, and includes discussion of Java 8 features, such as default and static methods, Functional Interfaces, Java Lambdas, and Method References.

What's included

15 videos4 readings4 assignments1 ungraded lab

15 videos Total 83 minutes

Interfaces vs Abstract Classes 5 minutes
Implementing and Using Interfaces 4 minutes
Vehicle Polymorphism Example 6 minutes
The Vehicle Demo 5 minutes
Extending Interfaces 4 minutes
Designing With Interfaces 10 minutes
Design Practices with Interfaces 5 minutes
Design Challenges and Methods 5 minutes
Evolving the Vehicle Interface - Default & Static Methods 4 minutes
Lambdas and Functional Interfaces (w/ Module Summary) 10 minutes
Functional Interfaces 4 minutes
Lambdas 4 minutes
Using Lambdas in the Vehicle App 8 minutes
Lab Solution Summary 8 minutes
Interfaces - Summary 1 minute

4 readings Total 62 minutes

Designing With Default Methods in Java 8 15 minutes
Functional Interfaces and Lambdas 30 minutes
The Interface Equation 8 minutes
Remember This: Interfaces 9 minutes

4 assignments Total 57 minutes

Interfaces, Abstract Classes, Polymorphism - Knowledge Check 15 minutes
Design Practices - Knowledge Check 6 minutes
Functional Interfaces and Lambdas - Knowledge Check 6 minutes
Interface Assessment 30 minutes

1 ungraded lab Total 15 minutes

Working with Interfaces 15 minutes

Just as the first module served to foreshadow the entire content of this course, this module serves as a brief capstone, with a conceptual discussion of polymorphism mechanisms in Java, and practices for ensuring that polymorphism is an option in your programs.