Two fundamental problems with exception handling in Java are that it uses the type of an exception to indicate whether action should be taken based upon it, and that anything which takes action based upon an exception (i.e. "catch"es it) is presumed to resolve the underlying condition. It would be useful to have a means by which an exception object could decide which handlers should execute, and whether the handlers that have executed so far have cleaned things up enough for the present method to satisfy its exit conditions. While this could be used to make "uncatchable" exceptions, two bigger uses would be to (1) make exceptions which will only be considered handled when they're caught by code that actually knows how to deal with them, and (2) allow for sensible handling of exceptions which occur in a finally block (if a FooException during a finally block during the unwinding of a BarException, both exceptions should propagate up the call stack; both should be catchable, but unwinding should continue until both have been caught). Unfortunately, I don't think there would be any way to make existing exception-handling code work that way without breaking things.

在当前线程上模拟一个未捕获的异常是很容易的。这将触发未捕获异常的常规行为，从而在语义上完成工作。然而，它并不一定会停止当前线程的执行，因为实际上并没有抛出异常。

Throwable exception = /* ... */;
Thread currentThread = Thread.currentThread();
Thread.UncaughtExceptionHandler uncaughtExceptionHandler =
    currentThread.getUncaughtExceptionHandler();
uncaughtExceptionHandler.uncaughtException(currentThread, exception);
// May be reachable, depending on the uncaught exception handler.

这实际上在(非常罕见的)情况下很有用，例如当需要适当的错误处理时，但该方法从捕获(并丢弃)任何Throwable的框架中调用。

你可以把ChuckNorris隐藏起来，也可以把他封装起来，也可以把他吞下去……

try {doChuckAction();} catch(ChuckNorrisException cne){/*做其他事情*/}

Java中唯一的chucknorrisexception应该是OutOfMemoryError和StackOverflowError。

实际上，您可以“捕获”它们，这意味着在抛出异常时将执行catch(OutOfMemoryError ex)，但该块将自动将异常重新抛出给调用者。

我不认为公共类ChuckNorrisError extends Error可以解决这个问题，但是你可以尝试一下。我没有找到关于扩展错误的文档

我的答案是基于@jtahlborn的想法，但它是一个完全可用的Java程序，可以打包到JAR文件中，甚至可以作为web应用程序的一部分部署到您最喜欢的应用服务器上。

首先，让我们定义ChuckNorrisException类，这样它就不会从一开始就崩溃JVM(顺便说一句，Chuck真的很喜欢崩溃JVM:)

package chuck;

import java.io.PrintStream;
import java.io.PrintWriter;

public class ChuckNorrisException extends Exception {

    public ChuckNorrisException() {
    }

    @Override
    public Throwable getCause() {
        return null;
    }

    @Override
    public String getMessage() {
        return toString();
    }

    @Override
    public void printStackTrace(PrintWriter s) {
        super.printStackTrace(s);
    }

    @Override
    public void printStackTrace(PrintStream s) {
        super.printStackTrace(s);
    }
}

现在让敢死队来构建它:

package chuck;

import javassist.*;

public class Expendables {

    private static Class clz;

    public static ChuckNorrisException getChuck() {
        try {
            if (clz == null) {
                ClassPool pool = ClassPool.getDefault();
                CtClass cc = pool.get("chuck.ChuckNorrisException");
                cc.setSuperclass(pool.get("java.lang.Object"));
                clz = cc.toClass();
            }
            return (ChuckNorrisException)clz.newInstance();
        } catch (Exception ex) {
            throw new RuntimeException(ex);
        }
    }
}

最后是Main类:

package chuck;

public class Main {

    public void roundhouseKick() throws Exception {
        throw Expendables.getChuck();
    }

    public void foo() {
        try {
            roundhouseKick();
        } catch (Throwable ex) {
            System.out.println("Caught " + ex.toString());
        }
    }

    public static void main(String[] args) {
        try {
            System.out.println("before");
            new Main().foo();
            System.out.println("after");
        } finally {
            System.out.println("finally");
        }
    }
}

使用以下命令编译并运行它:

java -Xverify:none -cp .:<path_to_javassist-3.9.0.GA.jar> chuck.Main

您将得到以下输出:

before
finally

这并不奇怪，毕竟这是一个回旋踢:)

抛出的任何异常都必须扩展Throwable，因此总是可以捕获它。所以答案是否定的。

如果你想让它难以处理，你可以重写方法getCause()， getMessage()， getStackTrace()， toString()抛出另一个java.lang.ChuckNorrisException。