Why is this happenning with switch (Java)? [duplicate]

Question

Its pretty much clear that switch statements can take string value in Java and something like this :

String s="diljit"
switch(s){
 ..
 ....}

will always compile.. s is a object of type String.... but on the other hand switch statement cannot take objects of other classes? Why is this happening and How will i validate this question with a suitable answer..

Can switch statement take objects or not?

Answer 1

Can switch statement take objects or not?

No you can't use any arbitrary object in switch statements. This is specified in the language itself. Even String is only allowed from Java 7 onwards. From JLS §14.11:

The type of the Expression must be char, byte, short, int, Character, Byte, Short, Integer, String, or an enum type (§8.9), or a compile-time error occurs.