让我在这里提一下:Java

try 
{
...
}
catch (Exception e)
{
...
}

可能无法捕获所有异常!其实我以前也遇到过这种事，很让人抓狂;Exception派生自Throwable。因此，从字面上看，要捕获所有东西，你不希望捕获异常;你想抓住Throwable。

我知道这听起来很挑剔，但是当你花了好几天时间试图弄清楚“未捕获的异常”来自于被try包围的代码时……catch (Exception e)" block来自哪里，它会一直跟着你。

try {
   // ...
} catch (...) {
   // ...
}

注意…catch里面是一个真正的省略号。三个点。

然而，由于c++异常不一定是基Exception类的子类，因此在使用此构造时无法实际看到抛出的异常变量。

你可以使用

catch(...)

但这是非常危险的。在约翰·罗宾斯的《调试Windows》一书中，他讲述了一个战争故事，一个非常严重的bug被一个catch(…)命令掩盖了。您最好捕获特定的异常。捕获您认为try块可能合理抛出的任何异常，但如果确实发生意外，则让代码抛出更高的异常。

(在c++中)以可移植的方式捕获所有异常是不可能的。这是因为在c++上下文中，有些异常并不是异常。这包括除以零误差等。可以通过破解来获得在这些错误发生时抛出异常的能力，但这并不容易做到，当然也不容易以一种可移植的方式得到正确的处理。

如果你想捕获所有的STL异常，你可以这样做

try { ... } catch( const std::exception &e) { ... }

这将允许您使用e.what()，它将返回一个const char*，它可以告诉您有关异常本身的更多信息。这是与Java构造最相似的构造。

如果有人愚蠢地抛出一个不继承std::exception的异常，这将对您没有帮助。

有人应该补充说，在c++代码中无法捕捉“崩溃”。它们不会抛出异常，而是做任何它们喜欢做的事情。当你看到一个程序因为空指针的解引用而崩溃时，它正在做未定义的行为。没有std::null_pointer_exception。试图捕捉异常在那里没有帮助。

只是为了以防万一，有人正在阅读这篇文章，并认为他可以得到程序崩溃的原因。应该使用像gdb这样的调试器。

Can you run your JNI-using Java application from a console window (launch it from a java command line) to see if there is any report of what may have been detected before the JVM was crashed. When running directly as a Java window application, you may be missing messages that would appear if you ran from a console window instead. Secondly, can you stub your JNI DLL implementation to show that methods in your DLL are being entered from JNI, you are returning properly, etc? Just in case the problem is with an incorrect use of one of the JNI-interface methods from the C++ code, have you verified that some simple JNI examples compile and work with your setup? I'm thinking in particular of using the JNI-interface methods for converting parameters to native C++ formats and turning function results into Java types. It is useful to stub those to make sure that the data conversions are working and you are not going haywire in the COM-like calls into the JNI interface. There are other things to check, but it is hard to suggest any without knowing more about what your native Java methods are and what the JNI implementation of them is trying to do. It is not clear that catching an exception from the C++ code level is related to your problem. (You can use the JNI interface to rethrow the exception as a Java one, but it is not clear from what you provide that this is going to help.)