数组中存放是引用数据类型

数组中存储的java对象实际是“内存地址”，数组中存储的每个元素是“引用”

public class ArrayTest { public static void main(String[] args) { //a是一个数组 //a[0]是数组中的元素 Animal a=new Animal(); Animal b=new Animal(); Animal[] a1 ={a,b}; for (int i = 0; i <a1.length ; i++) { Animal animal1 = a1[i]; animal1.move();//java对象的move方法 } } } class Animal { public void move() { System.out.println("Animal move"); } } public class ArrayTest { public static void main(String[] args) { Animal[] k = {new Cat(), new Dog()}; for (int i = 0; i < k.length; i++) {//向下转型 if (k[i] instanceof Cat) { Cat cat = (Cat) k[i]; cat.eat(); } else if (k[i] instanceof Dog) { Dog dog = (Dog) k[i]; dog.jiao(); } } } } class Animal { public void move() { System.out.println("Animal move"); } } class Cat extends Animal { public void eat() { System.out.println("Cat move"); } } class Dog extends Animal { public void jiao() { System.out.println("Dog move"); } }