Listing 12-1 demonstrated specifying a method in an interface. Figure 12-2 illustrates the first of these method specifications. You can learn more about methods in Chapter 6.
清单12 - 1演示了在接口中指定方法。图12 - 2描述了第一个方法说明。你可以在第6章了解方法的更多内容。
More about methods: problems with defining what values are.
再多谈方法：定义“价值”会有什么难题？
More about methods: problems with defining what values are.
再多谈方法：定义“价值”会有什么难题？
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