虽然使用 Java switch case，它只接受 char 和 int，但我想提供字符串 case。如何做到这一点？
最佳答案
你不能在 switch-case 中有字符串(目前)。 It's on its way in Java 7.
目前接受的类型包括char, byte, short, int, Character 、Byte、Short、Integer 或枚举类型。
来自 Java 语言规范:
The type of the Expression must be char, byte, short, int, Character, Byte, Short, Integer, or an enum type (§8.9), or a compile-time error occurs.
...
All of the following must be true, or a compile-time error will result:
- Every case constant expression associated with a switch statement must be assignable (§5.2) to the type of the switch Expression.
- No switch label is null.
- No two of the case constant expressions associated with a switch statement may have the same value.
- At most one default label may be associated with the same switch statement.
关于java - 如何让 switch case 在 Java 中接受多种数据类型？，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/2987556/