比如像这样的情况：

1. interface Inter {...}
   
2. class Impl1 implements Inter {...}
   
3. class impl2 implements Inter {...}
   
4. 
   
5. class Demo {
   
6.     public static void main(String[] xxx){...}
   
7.     void method1(Inter i) {...}

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比如像这样的情况：

1. interface Inter {...}
   
2. class Impl1 implements Inter {...}
   
3. class impl2 implements Inter {...}
   
4. 
   
5. class Demo {
   
6.     public static void main(String[] xxx){...}
   
7.     void method1(Inter i) {...}

复制代码