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Java switch-case internals Switch-case statements are internally implemented with either tableswitch or lookupswitch bytecode instructions. Both instructions function by popping the stack for an ...

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.