java中子类继承父类调用利用继承方法时调用this

package cn.itcast.test1;
class Parent{
    public Object getObject(){
        return this;
    }
}
class Son extends Parent{
    
}
public class Test1 {

    public static void main(String[] args) {
          Son son = new Son();
          Son tem = (Son) son.getObject();
          if(son==tem)
              System.out.println("their this are the same!");
          else
              System.out.println("their this are the different!");
    }

}

结果：

their this are the same!

可以看出子类继承父类掉用父类的方法是中的this是子类。