You declare an interface with the interface keyword.
用interface关键字声明接口。
Listing 6 shows a version of the Configuration class in which the PHP V4 coder has tried to build a rudimentary interface even without the interface keyword.
清单6显示了一个版本的configuration类，在该类中PHPV 4编码人员尝试了构建基本接口而根本不使用interface关键字。
Its examples include how to retrieve albums and photos, upload photos through a customized Web interface, and search for photos by keyword.
本文的示例包括如何检索相册和照片、通过定制的web界面上传照片并按关键字搜索照片。
To ensure that your implementation is thread-safe, a class that implements this interface should use either the synchronized keyword on the methods or synchronized blocks within the methods.
为了确保实现是线程安全的，实现该接口的类应该在方法上使用synchronized关键字，或者在方法内部使用同步锁。
An SOA keyword for a requirement that you might want to test at the Web service interface level.
关键字SOA用于您想要在Web服务界面层次上测试的需求。
Note the implements keyword in the class definition where it's declared that this class implements the SensorListener interface.
注意类定义中的implements关键字，其中声明了该类实现Sensor Listener接口。
A class implements an interface with the implements keyword, as shown in Listing 9.
类用implements关键字实现接口，如清单9所示。
A class implements an interface with the implements keyword, as shown in Listing 9.
类用implements关键字实现接口，如清单9所示。
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