package test;

/**
 * @Description
 * @Author msli
 * @Date 2021年08月18日
 */

public class Plate<T> {
 private T item;

 public Plate(T t) {
 item = t;
 }

 public T getItem() {
 return item;
 }

 public void setItem(T item) {
 this.item = item;
 }

 public static void main(String[] args) {
// Plate<Fruit> p = new Plate<Apple>(new Apple());
 Plate<? extends Apple> p2 =new Plate<Apple>(new Apple());

 Plate<? super Fruit> p3 = new Plate<Fruit>(new Fruit());
 }
}