```
interface A{
     default void func(){
         System.out.println("This function is a default function in interface A!");
     }
}
interface B{
     default void func(){
         System.out.println("This function is a default function in interface B");
     }
}
class C implements A,B{
     public void func(){
         System.out.println("func in class C!");
         A.super.func();//What's meaning?
     }
}

```