此外,尽量使用 unchecked exception 来处理编程错误:unchecked exception 的优点在于不强制客户端显示的处理它,它会传播(propagate)到任何你想捕获它的地方,或者它会在出现的地方挂起程序并报告异常信息。Java API中提供了丰富的 unchecked excetpion,如:NullPointerException , Il
此外,尽量使用 unchecked exception 来处理编程错误:unchecked exception 的优点在于不强制客户端显示的处理它,它会传播(propagate)到任何你想捕获它的地方,或者它会在出现的地方挂起程序并报告异常信息。Java API中提供了丰富的 unchecked excetpion,如:NullPointerException,IllegalArgumentException和IllegalStateException等。
The most common example is aNullPointerException. An unchecked exception probably shouldn’t be retried, and the correct action should usually be to do nothing, and let it come out of your method and through the execution stack. At a high level of execution, this type of exception should be...
UnChecked Exception是RuntimeException,也就是说运行时的异常,这类异常不是必须需要catch的,你是没法预料的,比如说你在调用一个list.szie()的时候,如果这个list为null,那么就会报NUllPointerException,而这个异常就是RuntimeException,也就是UnChecked Exception Error和RuntimeException及其子类是unchecked exception.其他ex...
Java NullPointerException(NPE) is anunchecked exceptionandextends RuntimeException.NullPointerExceptiondoesn’t force us to use atry-catchblock to handle it. NullPointerExceptionhas been very much a nightmare for most Java developers. It usually pop up when we least expect them. ...
三.使用异常的最佳实践(Best Practices for Using Exceptions) 1.总是要做一些清理工作(Always clean up after yourself) 如果你使用一些资源例如数据库连接或者网络连接,请记住要做一些清理工作(如关闭数据库连接或者网络连接),如果你的API抛出Unchecked exception,那么你要用try-finally来做必要的清理工作: ...
Java allows you to create your own exception types by extending the Exception class for checked exceptions or the RuntimeException class for unchecked exceptions. This can make exception handling more specific and meaningful. Best Practices: Handle exceptions at an appropriate level. Avoid catching exc...
a communication problem while using the proxy will show up as the unchecked exceptionUndeclaredThrowableExceptionwrapping the originalIOException. If your MBean will only ever be accessed locally (from within the same Java Virtual Machine) then declaringIOExceptionis not necessary, but this case is rar...
1 Best Practices for Exception Handling http://www.onjava.com/pub/a/onjava/2003/11/19/exceptions.html提出设计api时有关exception的最佳实践 提出使用exception的最佳实践。 同时论述了使用检查型异常与unchecked异常的争论。 2 Java 理论与实践: 关于异常的争论 ...
其中异常类Exception又分为运行时异常(RuntimeException)和非运行时异常, 这两种异常有很大的区别,也称之为非检查异常(Unchecked Exception)和检查异常(Checked Exception),其中Error类及其子类也是非检查异常。 检查异常和非检查异常 检查异常:也称为“编译时异常”,编译器在编译期间检查的那些异常。由于编译器“检查...