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1·If you need runtime polymorphism, you must not use pass-by-value.

如果你需要运行时多态，你不能使用按值传递。

2·However, you must be aware that these alternatives change the semantics of the interaction from pass-by-value to pass-by-reference.

然而，您必须注意到这些可供选择的方案会将交互方法从按值传递(pass - by - value)改变为按引用传递(pass - by - reference)。

3·So what does pass-by-value actually mean? To answer this, it's instructive to look at some JVM1 bytecodes that result from the following two commands.

那值传递到底是什么意思？要回答这个疑问，有须要看一下运行以下两行命令后的JVM的字节码。

4·We also pass the post data in the postdata object (specified as an object containing key/value pairs by using gadgets.io.encodeValues() to format the input args).

我们还要传递 postdata 对象（被指定为包括键/值对的一个对象，通过使用 gadgets.io.encodeValues() 格式化输入 args）内的 post 数据。

5·You can improve the value of your business processes asset by importing the WebSphere business Modeler models into Rational Software Architect to pass the knowledge to your development team.

您可以通过将WebSphere Business Modeler模型导入到Rational Soft ware Architect之中，将知识传递到您的开发团队，从而提高业务处理过程资产的价值。

6·As you can see from the output (Listing 2), the perror function displays the string you pass to it, followed by a colon, a space, and then the textual representation of the current errno value.

正如您可以从输出(清单2)中看到的，perror函数显示了传递给它的字符串，后跟冒号、空格，接着是当前errno值的文字表示形式。

7·If the EJB client and EJB modules are mapped to different application server instances (often referred to as split-tier), then the EJB modules must be invoked remotely using pass by value semantics.

如果EJB客户机和EJB模块被映射到不同的应用服务器实例(通常表示为split - tier)，则必须使用通过值传递的语义来远程调用EJB模块。

8·The Object Request Broker (ORB) pass by reference option determines if pass by reference or pass by value semantics should be used when handling parameter objects involved in an EJB request.

Object Request Broker (ORB) 通过引用传递选项确定，在处理 EJB 请求中涉及的参数对象时应该使用通过引用传递还是通过值传递语义。

9·Providing a copy of the content is similar to using pass by value.

提供内容的一个副本与使用“通过值传递(pass by value)”很相似。

10·The enable-call-by-reference element is generally used to pass parameters by reference rather than by value, which requires making a copy of the parameters.

enable-call-by-reference 元素通常用于按引用传递参数，而不是按值传递，后者需要对参数做复制。

按值传递

1·If you need runtime polymorphism, you must not use pass-by-value.

如果你需要运行时多态，你不能使用按值传递。