Java 13 Features | Switch expression vs switch statement in java JDK 13
Extend switch so it can be used as either a statement or an expression, and so that both forms can use either traditional case labels (with fall through) or new case labels (with no fall through), with a further new statement for yielding a value from a switch expression.
These changes will simplify everyday coding, and prepare the way for the use of pattern matching in switch.
This was a preview language feature in JDK 12 and JDK 13.
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