相关疑难解决方法(0)

使用JDK/12 EarlyAccess Build 10,JEP-325 Switch Expressions已作为JDK中的预览功能集成.表达式的示例代码(如在JEP中一样):

Scanner scanner = new Scanner(System.in);
Day day = Day.valueOf(scanner.next());
switch (day) {
    case MONDAY, TUESDAY -> System.out.println("Back to work.") ;
    case WEDNESDAY -> System.out.println("Wait for the end of week...") ;
    case THURSDAY,FRIDAY -> System.out.println("Plan for the weekend?");
    case SATURDAY, SUNDAY -> System.out.println("Enjoy the holiday!");
}

在哪里Day作为一个枚举

public enum Day {
    MONDAY, TUESDAY, WEDNESDAY, THURSDAY, FRIDAY, SATURDAY, SUNDAY
}

该预览语言和VM特点JEP-12已经阐述了如何功能可以编译和使用运行时期间启用javac和java.

如何使用Maven试用这个功能？