java 泛型 操作

public class FanXintTest<T> {

    private T frunt;
    
    public FanXintTest(T frunt){
        this.frunt=frunt;
    }
    
    public T getFrunt(){
        return frunt;
    }
    
    public static void main(String[] args) {
        Frunt frunt=new Frunt();
        frunt.name="水果";
        frunt.weight="1kg";
        FanXintTest<Frunt> fxt=new FanXintTest<Frunt>(frunt);
        Frunt frunt2=fxt.getFrunt();
        System.out.println(frunt2.name);
        Apple apple=new Apple();
        apple.name="苹果";
        apple.color="red";
        FanXintTest<Apple> afxt=new FanXintTest<Apple>(apple);
        System.out.println(afxt.getFrunt().name);
      }
}
class Frunt{
    public String name;
    public String weight;
}
class Apple extends Frunt{
    public String color;
}