java - RuntimeException 和异常行为

Question

我的问题是为什么 JVM 在执行期间抛出 RuntimeException 不像Exception ，它在编译时抛出，即使 RuntimeException extends Exception。

这种行为差异在哪里以及如何定义？

Answer 1

JavaDoc说:-

11.1.1. The Kinds of Exceptions

The class RuntimeException is a direct subclass of Exception.RuntimeException is the superclass of all the exceptions which may bethrown for many reasons during expression evaluation, but from whichrecovery may still be possible.

RuntimeException and all its subclasses are, collectively, the run-time exception classes.

11.3. Run-Time Handling of an Exception

When an exception is thrown (§14.18), control is transferred from thecode that caused the exception to the nearest dynamically enclosingcatch clause, if any, of a try statement (§14.20) that can handle theexception.

A statement or expression is dynamically enclosed by a catch clause ifit appears within the try block of the try statement of which thecatch clause is a part, or if the caller of the statement orexpression is dynamically enclosed by the catch clause.