exception

问题 I'm working on macOS with JDK8. In catch, I have to give the entire name of exception like in this case (ArithmeticException e) instead of (Exception e) to run the code. If I use (Exception e) it gives an error that I'm not getting on windows os. why is that?? and how should I solve this?? The code works perfectly on windows OS with JDK8. On macOS work perfectly if the proper name of the exception (ArithmeticException e) is given. import java.util.*; public class ExceptionDemo { public static

问题 I have been trying to take an input from the user. I want to ensure that the input meets my requirements for the rest of the code for which I have used a try and catch block. However, after only one time catching, it aborts the code. I want to ensure that after catching error it actually goes back to the input function for as many times until the user gives the program a valid input. Is there a way to do that except not using try catch blocks altogether? Here's the code: #include <iostream>

问题 I have been trying to take an input from the user. I want to ensure that the input meets my requirements for the rest of the code for which I have used a try and catch block. However, after only one time catching, it aborts the code. I want to ensure that after catching error it actually goes back to the input function for as many times until the user gives the program a valid input. Is there a way to do that except not using try catch blocks altogether? Here's the code: #include <iostream>

问题 I am trying to continue with my code eventhough exception is present. Just print the exception and continue with code. Below is sample : def mkdir(path): mypath = "./customers/"+path print(mypath) try: os.makedirs(mypath) except OSError as exc: if exc.errno == errno.EEXIST and os.path.isdir(mypath): pass if __name__ == '__main__': item = 'dev' mkdir(item) print("Done") But It never prints Done. Console OutPut ./customers/dev --------------------------------------------------------------------

问题 I've defined this below bean as message source: @Bean("messageSource") public MessageSource messageSource() { ResourceBundleMessageSource messageSource = new ResourceBundleMessageSource(); messageSource.setBasenames("i18n/messages"); messageSource.setDefaultEncoding("UTF-8"); return messageSource; } and this is content of messages.properties file under src/main/resources/i18n/ folder: ExceptionTranslationFilter.insufficientAuthentication=A Custom message AbstractAccessDecisionManager

问题 I have to change a binding for wcf webservices from tcpbinding to webhttpbinding with basic authentication and ssl. Webservices are self hosted in a console application and in a windows service for production version. Some of local services are with named pipe binding, just if a service call another service. All works perfectly but not the global error manager (a class that implement IErrorHandler interface) Some of DAL or business methods throw an exception with a custom message and this

问题 I'm trying to fetch an image from the internet, and display a profile photo. If there is an error while displaying the pic (maybe it doesnt exist at that location), I want to display a stock icon. My code: class AvatarWidget extends StatelessWidget { const AvatarWidget({ Key key, }) : super(key: key); @override Widget build(BuildContext context) { return ClipOval( child: CircleAvatar( child: ProfilePicWidget(), radius: 70, backgroundColor: Colors.grey, ), ); } } class ProfilePicWidget extends

问题 Good morning. I suppose it's a very simple question for you guys... In below code, exception NumberFormatException, can be thrown in to places, when we provide value for "a" and "b" variables. Catch block handles exceptions by starting the method again, no matter if the exception was trigged by wrong value of "a" or "b". I would like to change the code in a way that if the exception occurs while providing value for varaible "b", the method start not from the very beginning, but from the place

问题 The title is quite self-explanatory, but I will try to explain the issue further here so as to be more precise. My code runs on an ESP8266-01 connected to a fan and is used to control it through Telegram (with its own bot) and Adafruit MQTT, from both of which it receives a command (not at the same time, it's just to have multiple ways to control the fan in case I don't have my phone by me). Anyway, this is where the problems kick in: after an indeterminate amount of time (could be 5 minutes,

问题 I have to change a binding for wcf webservices from tcpbinding to webhttpbinding with basic authentication and ssl. Webservices are self hosted in a console application and in a windows service for production version. Some of local services are with named pipe binding, just if a service call another service. All works perfectly but not the global error manager (a class that implement IErrorHandler interface) Some of DAL or business methods throw an exception with a custom message and this