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Java Coding Problems - Second Edition

You're reading from  Java Coding Problems - Second Edition

Product type Book
Published in Mar 2024
Publisher Packt
ISBN-13 9781837633944
Pages 798 pages
Edition 2nd Edition
Languages
Author (1):
Anghel Leonard Anghel Leonard
Profile icon Anghel Leonard

Table of Contents (16) Chapters

Preface 1. Text Blocks, Locales, Numbers, and Math 2. Objects, Immutability, Switch Expressions, and Pattern Matching 3. Working with Date and Time 4. Records and Record Patterns 5. Arrays, Collections, and Data Structures 6. Java I/O: Context-Specific Deserialization Filters 7. Foreign (Function) Memory API 8. Sealed and Hidden Classes 9. Functional Style Programming – Extending APIs 10. Concurrency – Virtual Threads and Structured Concurrency 11. Concurrency ‒ Virtual Threads and Structured Concurrency: Diving Deeper 12. Garbage Collectors and Dynamic CDS Archives 13. Socket API and Simple Web Server 14. Other Books You May Enjoy
15. Index

33. Selecting a pseudo-random number generator

When we flip a coin or roll the dice, we say that we see “true” or “natural” randomness at work. Even so, there are tools that pretend they are capable of predicting the path of flipping a coin, rolling dice, or spinning a roulette wheel, especially if some contextual conditions are met.

Computers can generate random numbers using algorithms via the so-called random generators. Since algorithms are involved, the generated numbers are considered pseudo-random. This is known as “pseudo”-randomness. Obviously, pseudo-random numbers are also predictable. How so?

A pseudo-random generator starts its job by seeding data. This is the generator’s secret (the seed), and it represents a piece of data used as the starting point to generate pseudo-random numbers. If we know how the algorithm works and what the seed was, then the output is predictable. Without knowing the seed, the rate of predictability...

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