nullpointerexception

网络释义：空指针异常；会抛出异常的；空指向异常

网络释义

1.空指针异常 <div class="more"> 更多>> NullPointerException- 如果 listener- 侦听器 ...

5.空引用异常 ArithmeticException: 算术异常 NullPointerException: 空引用异常 overload: 重载 ...

6.会抛出空指针a.equals("string");是会抛出空指针（NullPointerException）的错误。这时：if (a==null)会返回true.所以：[code]if (a!=null){ if(a.e…

1.These wsdl-return-value-mapping elements should be removed (otherwise NullPointerException is thrown during the deployment).这些wsdl-return-value-mapping元素应该删除（否则在部署期间会抛出NullPointerException）。

2.NullPointerException - if the specified element is null and this list does not support null elements (optional).如果指定元素为null而列表不支持null元素时抛出（可选）。

3.Attempting to add an ineligible element throws an unchecked exception, typically NullPointerException or ClassCastException .试图加入一个不适当的元素会抛出未检查异常，通常为NullPointerException或ClassCastException。

4.Attempting to insert an ineligible key or value throws an unchecked exception, typically NullPointerException or ClassCastException.试图插入一个不合适的key或值将抛出未检查异常，通常为NullPointerException或ClassCastException。

5.Constructs a NullPointerException with no detail message.创建一个不含详细信息的NullPointerException。

6.Example: The following code mistakenly catches a NullPointerException.例如：下面的代码错误的捕捉一个空指针异常。

7.As expected, the test failed with the following error message: java. lang. NullPointerException.正如预期的一样，测试失败，并显示了以下错误消息：java.

8.Note: If you leave the properties variable value as null, you get NullPointerException.注意：如果您保留properties变量值null，您得到NullPointerException。

9.NullPointerException - if the given array is null.如果指定数组为null时抛出。

10.In Java, calling any method on null will cause a NullPointerException.然而在Java中，企图调用一个null对象的方法将会引发一个NullPointerException异常。