Category: Java
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Prerequisites for Java Multithreading and Concurrency To tackle Java multithreading and concurrency, you should have a solid grasp of **Java fundamentals**, including data types, operators, control structures, and object-oriented programming concepts. Familiarity with **threading basics**, such as the life cycle of a thread and the differences between **user threads** and **daemon threads**, is also essential.…
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Table of Contents Prerequisites for Java 21 Structured Concurrency Deep Dive into Java 21 Structured Concurrency Concepts Step-by-Step Guide to Using Java 21 Structured Concurrency Full Example of Java 21 Structured Concurrency in Action Common Mistakes to Avoid in Java 21 Structured Concurrency Mistake 1: Not Handling Exceptions Properly Mistake 2: Not Waiting for Tasks…
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When you have 200 concurrent users hitting a single-threaded service, you’ll see the connection pool exhaustion error: “java.sql.SQLException: Connection is closed”. This is because the default connection pool size is not sufficient to handle the load. To fix this, you need to implement proper testing using JUnit and Mockito. TL;DR: In this tutorial, you will…
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Prerequisites for Spring Boot Unit Testing To get started with Spring Boot unit testing, you should have a basic understanding of **Spring Boot**, **JUnit 5**, and **Mockito**. Spring Boot is a popular framework for building web applications and microservices, while JUnit 5 is a testing framework that provides a lot of features for writing unit…
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Prerequisites for Java Recursion To tackle Java recursion problems, you should have a solid grasp of basic Java programming concepts, including **data types**, **operators**, and **control structures**. Understanding how to work with **arrays** and **lists** is also essential, as these data structures are often used in recursive algorithms. Familiarity with **object-oriented programming** principles, such as…