Java 21: Focus on Virtual Threads and Pattern Matching

Java 21 is coming with many new features, two of which will have a tremendous impact on the way you write Java code. This session covers these significant topics: virtual threads and pattern matching that enables data-oriented programming for the Java platform. First, you’ll learn how virtual threads fix several problems with the executor service pattern and propose an alternative programming model to asynchronous programming. This model lowers the maintenance cost of your application code and also improves its observability.

Then, you’ll see how data-oriented programming can improve the quality of your architecture. It is an alternative to object-oriented programming, a paradigm on which Java has been built from the beginning. It relies on three features: sealed classes, records, and pattern matching. Records and sealed classes are already final features, whereas pattern matching is still under work, with some elements already there and more to come.

Speaker: José Paumard

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