Category: Java
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Table of Contents Introduction to Java 26 Prerequisites for Upgrading to Java 26 Deep Dive into Java 26 Features Step-by-Step Guide to Upgrading to Java 26 Full Example of a Java 26 Project Common Mistakes to Avoid When Upgrading to Java 26 Mistake 1: Using Deprecated Methods Mistake 2: Incorrect Use of Generics Production-Ready Tips…
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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: Unable to acquire JDBC Connection”. This is because the default connection pool size is not sufficient to handle the load. To solve this, you need to implement a more efficient connection pool management system. TL;DR: In this…
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Table of Contents Prerequisites for Java 17 and Java 21 Deep Dive into Java 17 and Java 21 Concepts Step-by-Step Guide to Java 17 and Java 21 Development Full Example Project Using Java 17 and Java 21 Features Common Mistakes to Avoid in Java 17 and Java 21 Development Mistake 1: Incorrect Use of Records…
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Prerequisites for Java 21 To start working with Java 21, you should have a solid understanding of **Java fundamentals**, including **object-oriented programming** and **Java syntax**. Additionally, familiarity with **Java 8** features such as **lambda expressions** and **method references** is recommended. You can review these concepts in our Java 8 tutorial for further reading. Java 21…
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When you have 200 concurrent users hitting a single-threaded service, you’ll see NullPointerExceptions thrown left and right, bringing your application to its knees. The root cause? Poor handling of null values. This is where Java’s Optional class comes in – a powerful tool for avoiding NullPointerExceptions and ensuring null safety. TL;DR: In this article, you’ll…