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
03 - CoderPad tour

1. Inheritance

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

2. Polymorphism

11 - Polymorphism with objects
12 - Object typecasting
13 - instanceof operator
14 - Code Solution - Employee report

3. Abstraction

15 - Abstract classes and methods
16 - Inheriting from abstract classes
17 - Creating objects with abstract types
18 - Code Solution - Orchestra concert

4. Interfaces

19 - Creating an interface
20 - Implementing interfaces
21 - Instantiating objects with interface types
22 - Default and static methods
23 - Code Solution - Shirt product

5. Data Structures

24 - Collections framework
25 - Sets
26 - Lists
27 - Queues
28 - Maps
29 - Iterators
30 - Enhanced for loops
31 - forEach() and lambdas
32 - Code Solution - Gradebook

6. Functional Programming

33 - Functional interfaces
34 - Streams
35 - Common stream operations
36 - Code Solution - Color filter

7. Exception Handling

37 - Try and catch blocks
38 - Stack trace and exception message
39 - Checked vs. unchecked exceptions
40 - Handling multiple exceptions
41 - Finally block
42 - Try with resources
43 - Throwing exceptions
44 - Rethrowing exceptions
45 - Code Solution - Unauthorized user

Conclusion

46 - Next steps