This method will return null if the focus owner is not in the same context as the calling thread.
如果该焦点所有者未和调用线程处于同一个上下文中，那么该方法会返回空。
When using the structure based IO method, RPG will create the initial storage for the input and output buffers, along with storage for the null indicator map.
使用基于结构的IO方法时，RPG将为输入和输出缓冲区创建初始存储空间，并为空指示符映射创建存储空间。
Or, in the case of a non-applicable method, it becomes a null operation.
或者，在不适用的方法的情况下，成为空操作。
If viewForward is null, this variable is set to failure in the execute method.
如果viewforward为空，那么在execute方法中会将这一变量设置为failure。
If the method returns null, it means this is the first time through, so the servlet needs to retrieve the list from the database.
如果方法返回空，意味着这是第一次访问，所以servlet需要从数据库检索列表。
If null is specified for the scope to be searched, the method will search the entire config directory, which can be expensive.
如果搜索范围被指定为空，该方法将搜索整个config目录，这样开销会非常大。
The session parameter can be null, meaning that the method will create a separate anonymous session, do the work and then save the session in one method call.
session参数可以为空，这表示该方法将创建一个单独的匿名会话，请创建该会话，然后在一次方法调用中保存它。
Next, specify a null because you're not adding a PDF link (created with the AddLink method) target for this image.
下一步，指定一个空值，因为您没有为此图像添加pd f链接(通过AddLink方法创建)目标。
Therefore, you know that an object has been declared finalizable and possibly, but not necessarily, collected, when the get method of the WeakReference or SoftReference class returns null.
这样，您就可以知道当WeakReference或softreference类的get方法返回null时，就有一个对象被声明为finalizable，而且可能(不过不一定)被收集。
The parse method returns null for an empty string input.
对于空字符串输入，该解析方法返回null。
While remove behaves like the collection interface version, instead of throwing an exception when called with an empty collection, the new poll method just returns null.
remove的行为与Collection接口的版本相似，但是新的poll方法在用空集合调用时不是抛出异常，只是返回null。
If there are no WatchKeys to return by the end of the timeout, this method returns null.
如果在超时时间结束时，没有WatchKeys返回，这一方法将会返回null。
This rule set contains some of the more questionable checks, including assigning null to a variable, multiple return points from a method, and importing from the sun packages.
这个规则集包含一些更有问题的检验，其中包括把null赋值给变量、方法中有多个返回点，以及从sun包导入等。
Any value lower than 1 would result in this method to return null.
任何低于1的值都将导致此方法返回null。
The static Current property uses the Stack.Peek method to return the T instance at the top of the stack if one exists, returning null if the Stack is empty.
静态Current属性使用Stack.Peek方法返回位于堆栈顶端的T实例（如果存在），如果Stack 为空则返回空。
When you don't need to pass data along through send , then just pass null as the argument to this method.
如果不需要通过send传递数据，则只要传递null作为该方法的参数即可。
If the namespace does not match this library's, the method simply returns null, and the RELAX ng validator looks elsewhere for the correct library, as the code in Listing 1 shows.
如果名称空间与类型库不匹配，那么该方法将返回null,RELAX NG将到其他地方寻找正确的库，如清单1中的代码所示。
However, the tests such tools come up with tend to be fairly trivial and basic stuff, like whether a method can handle being passed a null argument.
然而，这些工具生成的测试往往相当琐碎和基本，例如方法是否能够处理传递来的null参数。
Looking closely at Listing 10 reveals the issue: I initially coded the pop method to return null if the internal container had anything in it.
仔细观察清单10会发现：一开始我将pop方法编写为当内部容器中有项目时，就返回null。
Otherwise the transform method just returns null to indicate that no modifications are necessary.
否则transform方法只返回null，表明没有必要进行修改。
This method returns the children of the given tree node, or it returns null if the leaf tree node is encountered.
该方法返回给定树节点的子节点，或者如果遇到叶子节点，它返回null。
We could add validation code to the register method to determine whether the first-name field is blank or null.
我们可以在register方法中添加验证代码，以确定名字字段是否为null。
The fifth parameter of null specifies that the node this method is operating on has inherited the necessary namespaces.
第五个参数null指定该方法所操作的节点继承了所需的名称空间。
If the HTTP method is GET (currently not used by JSF forms), the form data has already been appended to the URL and send is called with a null parameter.
如果HTTP方法是GET(当前未被JSF表单使用)，那么表单数据应该已经追加到此url，并会用null参数调用send 。
Furthermore, if the service isn't available (there isn't a database, or the database has been temporarily stopped), then this method returns null to indicate that no such service is available.
此外，如果服务不可用(数据库不存在，或数据库临时停掉了)，那么这个方法会返回null以说明该服务不可用。
If this method returns void, no change is needed, but if it returns DataObject, change the last line from return null; to return input;.
如果这个方法返回void，则不需要任何更改；如果返回DataObject，则将最后一行从returnnull；更改为returninput；。
Since we implement no metadata service in this example, the method returns an array with length 0 (returning null would have indicated an error).
由于我们在这一示例中没有实现任何元数据服务，所以该方法返回一个长度为0的数组(返回null将表明有错误)。
The outer method calls inner with an argument of null, which will result in inner doing nothing.
outer方法用参数null调用inner，结果是inner什么也不做。
The only modification required is the quote method: Change the value return null; to return 250.50;.
只需修改quote方法：将值returnnull；更改为return 250.50；。
The only modification required is the quote method: Change the value return null; to return 250.50;.
只需修改quote方法：将值returnnull；更改为return 250.50；。
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