A method overriding problem in upward transition-优快云博客

本文探讨了在继承过程中，相同名字的属性保持隐藏，而方法则在子类中覆盖的现象。通过示例代码展示了当向上转型发生时，原始方法被忽略，实际调用的是超类对象中子类的方法。

1) In the process of inheritance, the contants have same names in super class would not be overrided but be hidden. However the methods have same name and significantion in the super class would be replaced(overriding) in the subclass. When the upward transition happend, the orgin method is missed and the method in the super class's object would actually be the method in subclass.

Here is my test code.

package com.suncosmo.example;

/**
 * Created by SunZhiCong on 2015/8/20.
 */
public class TestMain {
    public static void main(String args[]){
        Human Tom = new Man("Tom");
        System.out.println(Tom.getSex());
    }
}
class Human{
    protected String name = "Human";
    protected String sex = "Humanity";
    Human(){
        System.out.println("Human!");
    }
    Human(String name){
        System.out.println("Human:"+name);
        this.name = name;
    }
    public String getSex(){
        return this.sex;
    }
}

class Man extends Human{
    //private String sex = "Male";
    Man(String name){
        //super(name);
        //this.name = name;
        this.sex = "Male";
        System.out.println("Man:"+name);
    }
    public String getSex(){
        System.out.println("Human");
        return this.sex;
    }
}