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In Java, sealed classes are a feature introduced in Java 15 (as a preview and finalized in Java 17) that allows you to control inheritance by specifying which classes or interfaces can extend or implement a given class or interface. This makes your class hierarchy more predictable and easier to reason about. Using sealed classes […]
Enhanced instanceof pattern matching, introduced in Java 16 (as a preview feature) and finalized in Java 17, allows you to combine type checking with type casting, reducing boilerplate code and making it more concise and readable. Here’s how you can use enhanced instanceof pattern matching: Basic Usage: Instead of separately checking if an object is […]
Using Optional in Java can help streamline and simplify null checks, avoiding potential NullPointerException issues and making the code more readable and elegant. Optional is particularly useful when you want to express the possibility of an absent value explicitly in the API and handle such scenarios gracefully. Here’s how you can use Optional for cleaner […]
The Objects.requireNonNullElse method, introduced in Java 9, provides a safe and convenient way to handle null references by returning a default value if the provided object is null. This method ensures that you won’t get a NullPointerException in cases where you expect an object but want a fallback when it’s null. Syntax public static <T> […]
The switch expression, introduced in Java 12 (as a preview feature) and became a standard feature in Java 14, provides a more concise and powerful way to use switch statements. Here’s how to use it effectively: Key Features of Switch Expressions Simpler Syntax: The new syntax allows the use of the -> syntax to eliminate […]
In Java, records are special classes introduced in Java 14 (as a preview feature) and became a standard feature in Java 16. They are specifically designed to model immutable data carriers with minimal boilerplate code. A record in Java automatically generates boilerplate code such as constructors, getters, toString, equals, and hashCode methods, making it a […]
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