In this blog post, we will see how the humble Java switch statement evolved from a fall-through curiosity into a powerful expression, and how understanding its mechanics unlocks classic techniques like Duff's Device.
Java's switch statement has evolved from a fall-through-prone construct into a modern expression syntax introduced in Java 14. The post traces this evolution using a concrete example, a method that computes triangular numbers by intentionally allowing execution to cascade through cases without break statements.
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