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What i try to accomplish is to register a global handler to catch all uncaught exceptions. Searching the web i only managed to find people pointing out window.onerror but this doesn't do the trick for me. Apparently window.onerror only gets called upon errors and not upon exceptions. Assume the following code:
function windowError(message, url, line) {
alert(message, url, line);
}
window.onerror=windowError;
throw("uncaught");
The obviously uncaught exception won't trigger the windowError handler. (Using Firefox 3.6.3)
Any suggestions?
646
throws: The throws keyword is used for exception handling without try & catch block. It specifies the exceptions that a method can throw to the caller and does not handle itself.
If it finds no appropriate catch block anywhere in the call stack, it will terminate the process and display a message to the user. In this example, a method tests for division by zero and catches the error. Without the exception handling, this program would terminate with a DivideByZeroException was unhandled error.
Yes, It is possible to have a try block without a catch block by using a final block. As we know, a final block will always execute even there is an exception occurred in a try block, except System. exit() it will execute always.
Handling uncaught or runtime Java exceptions Thankfully, Java provides a powerful mechanism for handling runtime exceptions. Every Thread includes a hook that allows you to set an UncaughtExceptionHandler . Its interface declares the method uncaughtException(Thread t1, Throwable e1) .
Errors are caught the same way as exceptions in javascript and in fact, in your example the message get's alerted (Firefox 3.6.3).
98
As far as i know you'll need try/catch blocks to make this happen. That's sort of the point, that you need to know when to handle which kinds of errors.
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