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Switch-case statements are internally implemented with either tableswitch or lookupswitch bytecode instructions. Both instructions function by popping the stack for an integer value, and selecting a ...

JEP 441, Pattern Matching for the switch, is completed in JDK 21, following four previews in JDKs 17-20 (JEPs 406, 420, 427, 433). It finalizes the feature, addressing feedback from previews, and ...

Allowing developers to handle an exception from the selector in switch with a case in the switch block would make switch more usable for pattern matching, the proposal says.