Java 8+ Essential Training: Objects and APIs

Course details

If you want to build applications for mobile devices, desktop computers, or the web, you need to know Java—and keep your knowledge up to date as the language evolves. Java 9 is changing quite a few important aspects of the programming workflow, particularly the handling of objects and APIs. This course is the second in the Java Essential Training series, which provides the foundation for learning Java 9. Instructor David Gassner starts by showing how to debug Java code in IntelliJ IDEA, and handle any exceptions that occur. He explains how to create custom classes and understand how Java implements inheritance, a core principle of object-oriented programming. Plus, learn how to store data in memory with the Java Collections Framework, extend Java with popular APIs, make network requests, and package your applications for deployment in JAR files.

Learning objectives
Debugging Java code
Handling exceptions
Creating custom classes
Working with inheritance
Managing data collections
Using Java packages and libraries
Preparing a Java application for deployment

Concepts

0. Introduction

01 - Welcome
02 - What you should know
03 - How to use the exercise files
04 - Which version of Java do you want to learn

1. Exception Handling and Debugging

05 - Syntax errors vs. exceptions
06 - Debug with IntelliJ IDEA
07 - Handle exceptions with try-catch
08 - Create multiple catch blocks
09 - Checked vs. unchecked exceptions

2. Create Custom Classes

10 - About encapsulation
11 - Use the Java runtime classes
12 - Wrap code in static methods
13 - Declare and use custom classes
14 - Organize code with packages
15 - Create and use instance methods
16 - Manage state with instance variables
17 - Declare multiple constructor methods
18 - Use static fields as constants
19 - Declare and use enum types
20 - Organize code with nested types

3. Work with Inheritance

21 - About inheritance and polymorphism
22 - Extend classes and override methods
23 - Cast objects as different types
24 - Create and implement interfaces
25 - Use abstract classes and methods

4. Manage Data Collections

26 - Store values in simple arrays
27 - Manage resizable arrays with List
28 - Manage key-value pairs with Map

5. Use Java Packages and Libraries

29 - Work with dates and times
30 - Copy files with readers and buffers
31 - Copy files with Path and Files classes
32 - Parse a JSON file
33 - Include packages with modules

6. Prepare a Java Application for Deployment

34 - Document code with Javadoc
35 - Package classes in JAR files

Conclusion

36 - Next steps

Java 8+ Essential Training: Objects and APIs

Authors

David Gassner