Java Essential Training: Objects and APIs

Course details

Knowing Java—one of the most popular programming languages in the world—can be beneficial if you’re interested in building applications for mobile devices, desktop computers, or the web. You also need to stay up to date as the language evolves and changes over time. In this course, Certified Java developer Angie Jones walks you through the fundamentals of objects and APIs in the most recent long-term support (LTS) release, Java 17.

Learn the basics of inheritance, polymorphism, abstraction, interfaces, data structures, and more, building out your skill set with some of the most common operators used in functional, object-oriented programming. Along the way, get tips from Angie on how to handle exceptions, resolve errors, and prevent memory leaks in your code. By the end of this course, you’ll be ready to make your next move and boost your career as a Java developer.

Concepts

0. Introduction

01 - Java objects and APIs
02 - What you should know

1. Inheritance

03 - Inheritance between classes
04 - Constructors in inheritance
05 - Overriding and overloading inherited methods
06 - Chain of inheritance
07 - Limiting access in inheritance
08 - Sealed classes
09 - Challenge - Cake Cake Cake
10 - Solution - Cake Cake Cake

2. Polymorphism

11 - Polymorphism with objects
12 - Object typecasting
13 - instanceof operator

3. Abstraction

14 - Abstract classes and methods
15 - Inheriting from abstract classes
16 - Creating objects with abstract types

4. Interfaces

17 - Creating an interface
18 - Implementing interfaces
19 - Instantiating objects with interface types
20 - Default and static methods

5. Data Structures

21 - Collections framework
22 - Sets
23 - Lists
24 - Queues
25 - Maps
26 - Iterators
27 - Enhanced for loops
28 - forEach() and lambdas
29 - Challenge - Gradebook
30 - Solution - Gradebook

6. Functional Programming

31 - Functional interfaces
32 - Streams
33 - Common stream operations

7. Exception Handling

34 - Try and catch blocks
35 - Stack trace and exception message
36 - Checked vs. unchecked exceptions
37 - Handling multiple exceptions
38 - Finally block
39 - Try with resources
40 - Throwing exceptions
41 - Rethrowing exceptions

Conclusion

42 - Next steps