Multiple labels are separated by commas.("1") // use '->' and no break neededĬase "Tuesday", "Wednesday", "Thursday" -> // multiple labels are commas separated JDK 13 (Preview) introduces "arrow labels" String day = "Wednesday" // switch on String supported since JDK 7 // Original switch statement with label "case: L" and "break"īreak // break needed, otherwise fall thruĬase "Tuesday": // fall thru without break JDK 12/13 introduces arrow labels, in the form of " case L ->", which does not fall thru to the next case and break is not needed. The original switch's label has the form of " case L:". switch works only as a statement, not as an expression.the default scoping in switch block (the whole block is treated as one scope).the default control flow behavior between switch labels (i.e., fall through without a break statement).The original switch statement (follows the C/C++ language) has several irregularities, such as: This simplifies everyday coding, and prepares the way for the use of pattern matching (JEP 305) in switch. JDK 12/13 extends the switch construct so that it can be used as either a statement or an expression. Notes: JDK 13's JEP 354 supersedes JDK 12's JEP 325. Reference: JEP 354: Switch Expressions (Preview). Switch Expression (Preview) ( tools/javac) (JEP 354) JDK 13 introduces 2 new language features: JDK 13 was released on September 17, 2019.
"JDK 13 Release Notes", including "What's New in JDK 13".
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