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What's New in Java: A Comprehensive Guide

Java is a constantly evolving programming language, with new features and updates being added regularly. In this tutorial, we'll take a look at some of the latest additions to the Java ecosystem, including new language features, APIs, and tools.

Java 17: The Latest Release

Java 17, also known as Java 17 LTS (Long-Term Support), is the latest release of the Java platform. It was released in September 2021 and includes a number of new features and improvements, including:

  • Sealed Classes: A new type of class that can be extended by a fixed set of subclasses, providing a way to restrict inheritance.
  • Pattern Matching for Switch Expressions: An extension of the switch expression feature introduced in Java 14, allowing for more expressive and concise code.
  • Text Blocks: A new way of representing multiline string literals, making it easier to work with large blocks of text.
  • Vector API: A new API for working with vectors, providing a way to perform operations on large datasets.

Sealed Classes


public sealed class Animal permits Dog, Cat {
    // ...
}

public final class Dog extends Animal {
    // ...
}

public final class Cat extends Animal {
    // ...
}

Pattern Matching for Switch Expressions


String shape = "circle";
double area = switch (shape) {
    case "circle" -> 3.14;
    case "rectangle" -> 4;
    default -> 0;
};

Text Blocks


String html = """
    
        
            
Hello World!
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