A new LTS version has always been the big news in the Java world, and JDK 21 is no exception. It was moved to Rampdown Phase One on June 16, meaning that the feature set has been frozen. An extensive set of 15 JEPs includes new, enhanced, and finalized functionality. Let’s take a dive into the upcoming LTS release — it might be just the version you will stick to for the years ahead!

Novelties

JEP 430: String Templates (Preview)

String templates are a preview language feature and API aimed at facilitating the expression of strings that contain values computed at run time. The existing Java mechanisms of concatenating literal text and expressions produce hard-to-read code or are associated with verbosity. Other languages utilize string interpolation, which allows for conciseness but brings potential security risks.    

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