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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
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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

Exercises

  1. To keep the park running smoothly, we need to keep track of the health of all dinosaurs. We need to identify any ill dinosaurs. Using a stream of Dinosaur objects, filter out dinosaurs that are ill (assuming the isIll() method exists the in Dinosaur class), map them to their names, and collect the results in a list. Lastly, print out this list of names of the dinosaurs that need immediate attention.
  2. Managing a dinosaur park of this size involves handling large amounts of data. To make an announcement in the park about dinosaur feeding times, create a list of dinosaurs, convert it into a stream, and use the map() function to get a list of dinosaur names. Then, use the forEach terminal operation to print out a message for each dinosaur’s feeding time.
  3. Keeping track of the total food required for all the dinosaurs can be tricky. Suppose you have an array of weights of all dinosaurs. Convert it into an IntStream and use the sum method to get the total weight...
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