Welcome to our comprehensive exploration of the latest features of Java 17! Java, renowned for its durability and versatility, has remained a cornerstone of software development for decades. With each iteration, the Java community eagerly anticipates enhancements and innovations that propel the language forward.
In this guide, we’ll delve into the key additions of Java 17 and their potential impact on developers.

  • Pattern Matching for Switch Statements: Pattern matching for switch expressions emerges as a notable addition in Java 17. This feature streamlines code by enabling developers to integrate switch expressions with pattern matching, resulting in more concise and readable code. Say goodbye to cumbersome “instanceof” checks! Java 17’s pattern matching allows for elegant data extraction directly within case labels, enhancing code readability, maintainability, and potentially reducing runtime overhead.
  • Sealed Classes & Interfaces: Controlling class evolution is made easier with sealed classes and interfaces. These features restrict which classes can inherit or implement them, fostering predictable codebases and preventing unintended subclassing. Consider a “Vehicle” class with sealed subclasses such as “Car”, “Truck”, and “Motorcycle” – ensuring no surprises with unexpected vehicles emerging later. Sealed classes and interfaces offer valuable benefits for large codebases and library design.
  • Enhanced Pseudo-Random Number Generators: Randomness plays a crucial role in simulations, games, and security applications. Java 17 enhances its pseudorandom number generators (PRNGs) with improved statistical properties and performance, ensuring applications remain unpredictable and secure.
  • Restore Always-Strict Floating-Point Semantics: To mitigate inconsistencies across platforms, Java 17 reinstates “always-strict” floating-point semantics, adhering strictly to the IEEE 754 standard. This guarantees consistent behavior across systems, particularly important for scientific calculations or financial modeling where precision is paramount.
  • New macOS Rendering Pipeline: Java 17 introduces a new rendering pipeline leveraging Metal, Apple’s graphics framework, for applications running on macOS. This enhancement delivers smoother animations, improved graphics performance, and better integration with the native macOS look and feel, providing users with a more seamless and visually appealing experience on Apple devices.
  • Foreign-Memory Access API: The Foreign-Memory Access API introduced in Java 17 offers a safe and efficient mechanism for accessing foreign memory outside the Java heap. This API facilitates seamless interaction with native libraries and data structures, enhancing performance and interoperability. By standardizing off-heap memory access, the Foreign-Memory Access API opens doors to building high-performance applications in Java.
  • Strongly Encapsulate JDK Internals: Java 17 strengthens internal security by privatizing certain internal packages within the JDK. This safeguard protects critical components from unintended access, enhancing platform stability and security. Developers should avoid reliance on these internal packages to ensure compatibility with future Java versions.
    In addition to these highlights, Java 17 introduces improvements such as null-pointer exceptions in switch expressions, text blocks for multi-line strings, and enhanced garbage collection performance. These features collectively contribute to a more robust, developer-friendly, and performant Java experience.
  • Deprecation of the Applet API: Java 17 marks the deprecation of the Applet API, reflecting the declining popularity of applets and aligning with modern web development practices. Developers are encouraged to transition to more secure and performant alternatives like web applications.

Java 17 brings a wealth of enhancements that empower developers to write efficient, secure, and maintainable code. By leveraging these features, developers can stay at the forefront of software development, delivering high-quality solutions that meet the evolving needs of the industry.

With over two decades of experience, Direction Software LLP specializes in crafting interactive, feature-rich, and high-performance web applications and portals. Our expertise encompasses a wide array of front-end frameworks, back-end frameworks, coding languages, and databases. We offer comprehensive software development services across various technology stacks and business domains. Our dedicated team comprises designers, developers, testers, and project managers, ensuring a seamless development process.

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About the author:
Sameet Borde – Senior Technical Manager (JAVA)
Sameet Borde brings over 20 years of experience in B2B Enterprise Applications, expertise in Java, JEE, Spring Framework, JPA/Hibernate, and Microservice architecture Proficient in Agile Scrum, he also possesses experience in AWS, and technologies such as Apache Camel and Apache Kafka. Sameet’s commitment to excellence drives him to deliver innovative solutions in enterprise application development.