Shulou(Shulou.com)06/01 Report--

This article mainly introduces how to avoid unnecessary abnormal use of java, has a certain reference value, interested friends can refer to, I hope you can learn a lot after reading this article, the following let the editor with you to understand.

Avoid unnecessary use of detected anomalies

Checking for exceptions forces the caller to handle the exception, because if not, the compiler complains. Overuse of checking for exceptions puts a burden on the caller to handle the exception. So the checked exception should be used if necessary. The rule of thumb for using checked exceptions is that when exceptions cannot be avoided by checking prerequisites, callers can take some useful actions to handle exceptions.

The common run-time exception itself is an example of not overusing to check for exceptions. Common runtime exceptions are: ArithmeticException,ClassCastException exception, thrown: IllegalArgumentException,IllegalStateException exception, IndexOutOfBoundExceptions,NoSuchElementException exception, and NullPointerException exception.

In the following method, when propertyName is not one of the target cases, there is not much the caller can do, so a runtime exception is thrown.

Overridepublic Object get (String propertyName) {switch (propertyName.hashCode ()) {case 842855857: / / marketDataName return marketDataName; case-1169106440: / / parameterMetadata return parameterMetadata; case 106006350: / / order return order; case 575402001: / / currency return currency; case 564403871: / / sensitivity return sensitivity; default: throw new NoSuchElementException ("Unknown property:" + propertyName) }} Thank you for reading this article carefully. I hope the article "how to avoid unnecessary abnormal use of java" shared by the editor will be helpful to everyone. At the same time, I also hope that you will support us and pay attention to the industry information channel. More related knowledge is waiting for you to learn!

Welcome to subscribe "Shulou Technology Information " to get latest news, interesting things and hot topics in the IT industry, and controls the hottest and latest Internet news, technology news and IT industry trends.