Cannot reduce the visibility of the inherited method from Father

有如下两个类

Father 类：

public class Father {
	public  void f() {     
        System.out.println("Father.f()");
     }
}

 Son类：

public class Son extends Father{

     private final void f() {     //这里会出现编译错误 Cannot reduce the visibility of the inherited method from Father
         System.out.println("Son.f()");
     }
	
	void test() {
        f();
     }
	
	 public static void main(String[] a) {
         new Son().test();
       
     }

}

 出现上面错误的原因是因为如果子类要覆盖了父类中定义的方法，那么不能降低其可见性

所以修改子类的修改符即可