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Java Coding Problems

You're reading from   Java Coding Problems Become an expert Java programmer by solving over 250 brand-new, modern, real-world problems

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Product type Paperback
Published in Mar 2024
Publisher Packt
ISBN-13 9781837633944
Length 798 pages
Edition 2nd Edition
Languages
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Author (1):
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Anghel Leonard Anghel Leonard
Author Profile Icon Anghel Leonard
Anghel Leonard
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Table of Contents (16) Chapters Close

Preface 1. Text Blocks, Locales, Numbers, and Math 2. Objects, Immutability, Switch Expressions, and Pattern Matching FREE CHAPTER 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

79. Splitting a date-time range into equal intervals

Let’s consider a date-time range (bounded by a start date and an end date represented by two LocalDateTime instances) and an integer n. In order to split the given range into n equal intervals, we start by defining a java.time.Duration as follows:

Duration range = Duration.between(start, end);

Having this date-time range, we can rely on dividedBy() to obtain a copy of it divided by the specified n:

Duration interval = range.dividedBy(n - 1);

Finally, we can begin from the start date (the left head of the range) and repeatedly increment it with the interval value until we reach the end date (the right head of the range). After each step, we store the new date in a list that will be returned at the end. Here is the complete code:

public static List<LocalDateTime> splitInEqualIntervals(
       LocalDateTime start, LocalDateTime end, int n) {
  Duration range = Duration.between(start, end);
  Duration...
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