Java Arrays Series
Last updated: March 28, 2024
Mocking is an essential part of unit testing, and the Mockito library makes it easy to write clean and intuitive unit tests for your Java code.
Get started with mocking and improve your application tests using our Mockito guide:
Handling concurrency in an application can be a tricky process with many potential pitfalls. A solid grasp of the fundamentals will go a long way to help minimize these issues.
Get started with understanding multi-threaded applications with our Java Concurrency guide:
Spring 5 added support for reactive programming with the Spring WebFlux module, which has been improved upon ever since. Get started with the Reactor project basics and reactive programming in Spring Boot:
Since its introduction in Java 8, the Stream API has become a staple of Java development. The basic operations like iterating, filtering, mapping sequences of elements are deceptively simple to use.
But these can also be overused and fall into some common pitfalls.
To get a better understanding on how Streams work and how to combine them with other language features, check out our guide to Java Streams:
Explore Spring Boot 3 and Spring 6 in-depth through building a full REST API with the framework:
Yes, Spring Security can be complex, from the more advanced functionality within the Core to the deep OAuth support in the framework.
I built the security material as two full courses - Core and OAuth, to get practical with these more complex scenarios. We explore when and how to use each feature and code through it on the backing project.
You can explore the course here:
Spring Data JPA is a great way to handle the complexity of JPA with the powerful simplicity of Spring Boot.
Get started with Spring Data JPA through the guided reference course:
Refactor Java code safely — and automatically — with OpenRewrite.
Refactoring big codebases by hand is slow, risky, and easy to put off. That’s where OpenRewrite comes in. The open-source framework for large-scale, automated code transformations helps teams modernize safely and consistently.
Each month, the creators and maintainers of OpenRewrite at Moderne run live, hands-on training sessions — one for newcomers and one for experienced users. You’ll see how recipes work, how to apply them across projects, and how to modernize code with confidence.
Join the next session, bring your questions, and learn how to automate the kind of work that usually eats your sprint time.
In distributed systems, managing multi-step processes (e.g., validating a driver, calculating fares, notifying users) can be difficult. We need to manage state, scattered retry logic, and maintain context when services fail.
Dapr Workflows solves this via Durable Execution which includes automatic state persistence, replaying workflows after failures and built-in resilience through retries, timeouts and error handling.
In this tutorial, we'll see how to orchestrate a multi-step flow for a ride-hailing application by integrating Dapr Workflows and Spring Boot:
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Arrays – Basics
- Arrays in Java: A Reference Guide
- Initializing Arrays in Java
- Array Operations in Java
- Check if a Java Array Contains a Value
- Creating a Generic Array in Java
- Comparing Arrays in Java
- How to Copy an Array in Java
- How to Reverse an Array in Java
- Check if Object Is an Array in Java
- Java ArrayIndexOutOfBoundsException
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Arrays – Conversions
- Converting Between an Array and a List in Java
- Convert List to Long[] Array in Java
- Converting Between an Array and a Set in Java
- Converting an int[] to HashSet in Java
- Concatenate Two Arrays in Java
- Convert Character Array to String in Java
- Convert Char Array to Int Array in Java
- How to Convert Byte Array to Char Array
- Convert byte[] to Byte[] and Vice Versa in Java
- Array to String Conversions
- Convert Java Array to Iterable
- Converting Between Stream and Array in Java
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Arrays – Searching
- Find the N Most Frequent Elements in a Java Array
- Find the Index of an Element in a Java Array
- Find the Middle Element of an Array in Java
- Calculating the Sum of Two Arrays in Java
- Find Sum and Average in a Java Array
- Finding Min/Max in an Array with Java
- Removing the First Element of an Array
- Merge Two Arrays and Remove Duplicates in Java
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Arrays – Sorting
- Sorting Arrays in Java
- Checking If an Array Is Sorted in Java
- Difference Between Arrays.sort() and Collections.sort()
- Permutations of an Array in Java
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