Question

While using Java’s switch case, it excepts only char and int, but I want to provide string cases. How to make this possible?

Answer 1

You cannot have strings in a switch-case (yet). It’s on its way in Java 7.

The current types that it accepts include char, byte, short, int, Character, Byte, Short, Integer, or an enum type.

From the Java Language Specification:

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.