August 30, 2022


Rohit Rawat


Java has followed a 6-month release cycle for quite a few years now. We saw significant changes in the last update of Java 18 in March. Now Java Development Kit 19 is coming out in September 2022. So, we are going to see massive modifications that are going to make the lives of developers very easy.

If you are a business owner or are thinking about using Java for your project, you must be aware of these changes. Thus, in this article, we will be discussing the new features in Java 19.

New Java 19 Features


Record Patterns

Nesting record patterns allow powerful and composable data navigation and processing. The goals include expanding pattern matching to describe more advanced and composable data searches. Developers can do that while keeping the syntax and semantics of type patterns unchanged.

That will improve pattern matching, which was released in JDK 16 in March 2021. Also, when record patterns are improved in the future, it is possible that features like array patterns will be added. So, you must hire Java developers who are aware of this.

Structured Concurrency

Structured concurrency aims to ease multithreaded programming by providing a structured concurrency API. This feature treats several tasks that are running on different threads as a single unit of work to make handling errors easier. This version's dependability has also been improved. Every Java web application development company will definitely be making full use of this feature.

Foreign Function and Memory API

This has an API that lets programs talk to code and data that aren't part of the Java runtime. The API enables Java applications to contact libraries and handle native data. It would do this without the risk of the Java Native Interface. It effectively executes foreign functions and safely accesses foreign memory. So this should be part of the Java software development services that you get.

The foreign function and memory API brings together the foreign memory access API and the foreign linker API. These are the two previously incubated APIs. JDK 17 incubated the foreign function and memory APIs. It was then included in JDK 18. The objectives include usability, performance, flexibility, and safety.

Virtual Threads

Virtual threads are small threads that make it easier to write, run, and keep track of applications. The goals include

  • Allowing server applications written in the simple thread-per-request style to scale with near-optimal hardware utilization
  • Allowing existing code that uses java.lang Thread API to adopt virtual threads with minimal change
  • Enabling virtual thread troubleshooting, debugging, and profiling with existing JDK tools

This feature doesn't get rid of traditional thread implementations or attempts to make programs use virtual threads without anyone noticing.

Pattern Matching

Pattern matching for switch expressions and statements extends pattern matching to switches. That allows an expression to be verified against many patterns. Each one does something different, which makes it easy and safe to write complex searches that are based on data. That makes this one of the best features in Java 19.

This feature will include changes such as replacing guarded patterns in switch blocks with when clauses. Moreover, when the value of the selector expression is null, the runtime semantics of a pattern switch is more closely matched with traditional switch semantics. Its aim is to allow patterns to appear in case labels. That increases the expressiveness and application of switch expressions and statements.

Other objectives include

  • Allowing developers to relax the switch's traditional null-hostility
  • Enhancing the safety of switch statements
  • Guaranteeing that current switch expressions and statements continue to compile and run with similar semantics

Linux/RISC-V Port

Java will acquire support for a hardware instruction set with the Linux/RISC-V port. RISC-V is a group of similar ISAs. The RISC-V RV64GV configuration is a general-purpose 64-bit ISA with vector instructions, and the Linux/RISC-V port would only support it. In the future, Java developers may examine alternative RISC-V setups. This feature will be a huge plus for Java application development services.

Vector API

This feature will define vector computations that will consistently compile at runtime to optimum vector instructions on supported CPU architectures. Therefore, it will deliver higher performance than similar scalar computations. The API  will allow developers to construct complicated vector algorithms in Java, leveraging the HotSpot auto-vectorizer. However, that will be with a user model that makes vectorizations more predictable and resilient.

This API has been enhanced to improve load capacity and to keep vectors to and from MemorySegments. There will also be a vector mask compress operation and two cross-lane vector operations (compress and expand) in JDK 19.

The compress vector operation moves lanes in lane order from a source vector to a destination vector. The expand vector operation does the opposite. The compress operation can be used to filter query results.

Another improvement to the vector API is the inclusion of bitwise integral lanewise operations. This means counting how many bits there are, changing the order of the bits, and compressing and expanding the bits. The API's goals

  • Being clear and concise
  • Platform independence
  • Having reliable runtime and compilation performance

In Conclusion

Narola Infotech is a leading Java development company that understands the importance of keeping up with the latest trends and developments. Our developers make sure that they make full use of the new features to increase productivity and improve quality. That is the reason why our clients are happy with us. If you have a Java project in mind, feel free to contact our experts at any time.

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