Exception

[josephine chen]

The object thrown by a throw st must be assignable to
Exception
Error
Throwable//t
String

[Alk]

You are Right!!
Alk

[josephine chen]

but Exception and Error both are correct

[Jim Yingst]

Actually no, it is not correct to say that the object thrown by a throw statement must be assignable to Exception, and it is also not correct to say that the object must be assignable to Error. Each of these statements eliminates the other as a possibility, which is wrong. Only Throwable is correct, because it's the only one that includes all possibilities.
[This message has been edited by Jim Yingst (edited February 21, 2000).]

[Tony Alicea]

Since the question says must, then Throwable is the only correct answer.
If it had said may or can then Exception and Error would have also been correct.