子类继承父类，相同属性问题

public class XuliehuaApplication {

    public static void main(String[] args) throws Exception {


        Son son=new Son();
        son.name="ccp";
        System.out.println(son.name);
        son.x("lpx");
       f1(son);


    }
 public static void f1(Father father){
     System.out.println(father.name);
 }

}
class Father{
    String name;
}
class Son extends Father{
    public void x(String name){
        super.name=name;
    }
    String name;

}

输出结果：

ccp

lpz

 

public class XuliehuaApplication {

    public static void main(String[] args) throws Exception {


        Son son=new Son();
        son.name="ccp";
        System.out.println(son.name);
        f1(son);


    }
 public static void f1(Father father){
     System.out.println(father.name);
 }

}
class Father{
    String name;
}
class Son extends Father{
    String name;

}

输出结果：

ccp

null

用多态看看结果

public class XuliehuaApplication {

    public static void main(String[] args) throws Exception {


        Father son=new Son();
        son.name="ccp";
        System.out.println(son.name);
        f1(son);


    }
 public static void f1(Father father){
     System.out.println(father.name);
 }

}
class Father{
    String name;
}
class Son extends Father{
    String name;

}

结果：

ccp

ccp