接口a public interface a { public void fun(); } --------------------------------------------------------- 接口b public interface b { public void fun();} ---------------------------------------------------------- 类c实现 a,b两个接口,并覆写相同的抽象方法 fun() public class c implements a, b { public void fun() {}
这种写法,会有一个 The return type is incompatible with 的错误 返回类型矛盾
public interface a {
public void fun();
}
---------------------------------------------------------
接口b
public interface b {
public void fun();}
----------------------------------------------------------
类c实现 a,b两个接口,并覆写相同的抽象方法 fun()
public class c implements a, b { public void fun() {}
返回类型矛盾