06/10/2023
Are you familiar with the distinctions between Java 18 and Java 21? If not, let's delve into Java 21.
Java 21 is a version of the Java SE platform that was released on September 19, 2023, and is considered a Long-Term Support (LTS) release.
It comes with a range of new features and enhancements, including:
- Virtual threads: a novel kind of thread that is lightweight and efficient, which can improve the performance and scalability of Java applications.
- Record patterns: a new form of pattern matching that can be used to deconstruct records, making it easier to write concise and understandable code.
- Pattern matching for switch statements: pattern matching can now be used in switch statements, simplifying the process of writing expressive and efficient code.
- Sequenced collections: a new type of collection that provides direct access to the first and last elements, which can enhance the performance of code that frequently accesses these elements.
- A new API for key encapsulation mechanisms: this API provides a secure way to store and manage symmetric keys.
- New methods in the String, StringBuilder, StringBuffer, Character, and Math classes: these methods make it easier to manipulate strings and characters.
- Improvements to the garbage collector: the garbage collector has been improved to reduce memory usage and improve performance.
- Support for the latest hardware and software: Java 21 includes support for the latest CPUs and operating systems.
See the image below for a summary of the major differences between Java 18 and Java 21.