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Learn Java with Projects

You're reading from   Learn Java with Projects A concise practical guide to learning everything a Java professional really needs to know

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Product type Paperback
Published in Nov 2023
Publisher Packt
ISBN-13 9781837637188
Length 598 pages
Edition 1st Edition
Languages
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Authors (2):
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Maaike van Putten Maaike van Putten
Author Profile Icon Maaike van Putten
Maaike van Putten
Dr. Seán Kennedy Dr. Seán Kennedy
Author Profile Icon Dr. Seán Kennedy
Dr. Seán Kennedy
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Toc

Table of Contents (22) Chapters Close

Preface 1. Part 1: Java Fundamentals
2. Chapter 1: Getting Started with Java FREE CHAPTER 3. Chapter 2: Variables and Primitive Data Types 4. Chapter 3: Operators and Casting 5. Chapter 4: Conditional Statements 6. Chapter 5: Understanding Iteration 7. Chapter 6: Working with Arrays 8. Chapter 7: Methods 9. Part 2: Object-Oriented Programming
10. Chapter 8: Classes, Objects, and Enums 11. Chapter 9: Inheritance and Polymorphism 12. Chapter 10: Interfaces and Abstract Classes 13. Chapter 11: Dealing with Exceptions 14. Chapter 12: Java Core API 15. Part 3: Advanced Topics
16. Chapter 13: Generics and Collections 17. Chapter 14: Lambda Expressions 18. Chapter 15: Streams – Fundamentals 19. Chapter 16: Streams: Advanced Concepts 20. Chapter 17: Concurrency 21. Index

Sorting collections

So far, we’ve learned how to create collections and how to perform basic operations on them. They have a lot of useful built-in methods, and one of them helps us sort collections. The reason we are paying attention to this one is because it’s not as straightforward as some of the others.

Some types have a natural order, such as numbers. They can be easily sorted from small to large. The same goes for strings – we can sort them A-Z. But how do we sort a collection that contains custom objects of the Task type?

Stick with me – soon, you’ll be able to do both natural ordering and custom ordering while using the sort method that’s built into collections.

Natural ordering

When we talk about natural ordering, we mean the default sorting order for a particular data type. For example, numbers are sorted in ascending order, while strings are sorted lexicographically. But still, Java wouldn’t know this without us...

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