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...
编译器要求这些异常必须被捕获或者重新抛出. 那些扩展了java.lang.RuntimeException的异常称为unchecked exceptions, 它们不是必须捕获的. 当然, 也可以捕获这些异常并相应地扩展调用栈, 就像通常对checked exceptions做的那样. Java是唯一的支持checked exceptions的主流语言, 而所有的C++和C#异常都相当于Java的unchecked ...
1. checked exception:(在Exception类中的说明) TheclassException and any subclasses that are not also subclasses of RuntimeException are checked exceptions. 2. unchecked exception: (在Error类中说明) Error and its subclasses are regarded as unchecked exceptionsforthe purposes of compile-time checking o...
[原文:When deciding on checked exceptions vs. unchecked exceptions, ask yourself, "What action can the client code take when the exception occurs?"] 如果客户端可以通过其他的方法恢复异常,那么这类异常就是checked exception;如果客户端对出现的这类异常力所不及,那么这类异常就是Unchecked exception;从应用...
观点3(支持Unchecked异常): 沿调用栈向上传播的Checked异常破坏了顶层的方法,因为这些方法必须声明抛出所有它们调用的方法抛出的异常。即,声明的异常聚合了调用栈中所有的方法抛出的异常。例如: [java] view plain copy public long readNumberFromUrl(String url) throws BadUrlExceptions, BadNumberException{ String ...
package check_unchecked_exceptions; public class VerifyException { public void first() throws GenericException { throw new GenericException("checked exception"); } public void second(String msg){ if(msg == null){ throw new NullPointerException("unchecked exception"); ...
at check_unchecked_exceptions.VerifyException.main(VerifyException.java:29) 上面的例子,结合checked以及unchecked的概念,可以看出Exception这个父类是checked类型,但是其子类RuntimeException (子类NullPointerException)却是unchecked的。 看完上述内容,你们对Java中checked与unchecked异常的区别是什么有进一步的了解吗?如果还...
那些扩展了java.lang.RuntimeException的异常称为unchecked exceptions, 它们不是必须捕获的. 当然, 也可以捕获这些异常并相应地扩展调用栈, 就像通常对checked exceptions做的那样. Java是唯一的支持checked exceptions的主流语言, 而所有的C++和C#异常都相当于Java的unchecked exceptions. 谢谢更正....
Java包含两种异常:checked异常和unchecked异常。C#只有unchecked异常。checked和unchecked异常之间的区别是: Checked异常必须被显式地捕获或者传递,如Basic try-catch-finally Exception Handling一文中所说。而unchecked异常则可以不必捕获或抛出。 Checked异常继承
3.2. Unchecked Exception Unchecked exceptions are not checked by the compiler. These are called runtime exceptions.Unchecked exceptions will come into life and occur in the program, once any buggy code is executed. In Java, the compiler does not force a member methodto declare the unchecked exce...