如何获取我的对象的父对象的实例 [英] How to get an instance of my object's parent

问题描述

Java 中有没有办法从该对象中获取我的对象的父类的实例?

Is there a way in Java to get an instance of my object's parent class from that object?

例如.

public class Foo extends Bar {

     public Bar getBar(){
          // code to return an instance of Bar whose members have the same state as Foo's
     }

}

推荐答案

没有内置的方法可以做到这一点.您当然可以编写一个方法，该方法将采用 Foo 并创建一个已使用相关属性初始化的 Bar.

There's no built-in way to do this. You can certainly write a method that will take a Foo and create a Bar that's been initialized with the relevant properties.

  public Bar getBar() {
       Bar bar = new Bar();
       bar.setPropOne(this.getPropOne());
       bar.setPropTwo(this.getPropTwo());
       return bar;
  }

另一方面，继承意味着Foo 是 Bar，所以你可以这样做

On the other hand, what inheritance means is that a Foo is a Bar, so you could just do

 public Bar getBar() {
      return this;
   }

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