为什么在Java中捕获多个异常时使用按位OR运算符（|）？

Question

I've just learned that | is used to catch multiple exceptions in the same block; | is the bitwise operator for OR. In this case, is it still used as a bitwise operator or does it have a different meaning when in context?

Answer 1

In this case, is it still used as a bitwise operator or does it have a different meaning when in context?

It has a different meaning - although it's of the same "flavour" in that it's "if exception X is caught, or exception Y is caught, or exception Z" is caught.

In the JLS section 14.20 the | is just included literally in the grammar - it's not the OR operator in this context.