题目内容

编程练习：编写Animal接口，接口中声明run()方法。定义Bird类和Fish类实现Animal接口。编写Bird类和Fish类的测试程序，并运用接口回调的思路调用其中的run（）方法。请在答案中附上代码以及运行结果截图，注意，代码和截图都不要使用附件上传。

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