Category: Java
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When you have a class hierarchy with a fixed set of subclasses, you’ll see the benefits of using sealed classes in Java 17. Without sealed classes, you might end up with a brittle and hard-to-maintain class hierarchy. For instance, when you have 200 concurrent users hitting a single-threaded service, you’ll see the importance of using…
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Prerequisites for Java 25 To get started with Java 25, you should have a solid understanding of **object-oriented programming** concepts and **Java syntax**. This includes familiarity with classes, interfaces, and inheritance. You should also be comfortable with **Java 8** features such as **lambda expressions** and **method references**. Before installing Java 25, ensure you have a…
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Prerequisites for Java 21 Pattern Matching Java 21 introduces **pattern matching** for switch statements and record patterns, which enhance the expressiveness of the language. To effectively utilize these features, you should have a solid grasp of **Java basics**, including data types, operators, and control structures. Familiarity with enum types and switch statements is also essential.…
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When you have 200 concurrent users hitting a single-threaded service, you’ll see the connection pool become a bottleneck, causing java.sql.SQLException: Connection is closed errors. This is because the default connection pool size is not sufficient to handle the load. TL;DR: In this tutorial, you’ll learn how to use Java 26’s Project Panama to improve your…
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Prerequisites for Java 26 Adoption To take full advantage of Java 26 performance improvements, ensure your development environment meets the necessary requirements. The **JDK 26** must be installed, and your project should be configured to use the **Java 26** compiler. This can be achieved by setting the **source** and **target** options to **1.26** in your…