java - 为什么不能在 Java 中抛出和捕获对象？

Question

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Answer 1

Java 语言规范规定只能抛出 Throwable。

http://java.sun.com/docs/books/jls/third_edition/html/exceptions.html#44043

Every exception is represented by an instance of the class Throwable or one of its subclasses; such an object can be used to carry information from the point at which an exception occurs to the handler that catches it.

语言可以有不同的定义，但 Java 倾向于为旨在以特定方式使用的任何类型的事物定义一个基类型，并在该基类中定义方法以支持通用模式。 Throwable 特别支持 chaining和堆栈跟踪打印。如果您对异常的唯一了解是它是引用类型，那么就不可能轻松地链接异常。