如果只简单地用不同的默认编码将文件复制到系统将会使编译器和解释器无法找到正确的类。
Simply copying a file to a system with a different default encoding can keep the compiler and interpreter from finding the right classes.
在单击open按钮时，Desktop类将调用系统默认的PDF阅读器，就像在下面的代码中可以看到的那样。
When you click the Open button, the Desktop class invokes the system's default PDF viewer, as you can see in the following code.
ResourceManager类将根据系统默认地区或您在构造函数中指定的地区来装载资源文件。
The ResourceManager class will load the resource files based on the system default locale or you could specify the locale in the constructor.
通常会将事件类分配给用户，还指定默认分配给系统上的每个用户的类。
A class of events is then typically assigned to users. The default class, that is the class that is assigned to each user on the system, is also given.
只返回是与系统默认设备接口关联的设备，如果设置，指定设备接口类。
Return only the device that is associated with the system default device interface, if one is set, for the specified device interface classes.
只返回是与系统默认设备接口关联的设备，如果设置，指定设备接口类。
Return only the device that is associated with the system default device interface, if one is set, for the specified device interface classes.
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