Java 集合框架ArrayList 储存自定义数组

package LinkedList;import java.util.ArrayList;import java.util.Iterator;import p.bean.Person;public class ArrayListDemo {public static void main(String[] args) {// TODO Auto-generated method stubArrayList a1=new ArrayList();a1.add(new Person("李四1",21));a1.add(new Person("李四2",22));a1.add(new Person("李四3",23));a1.add(new Person("李四4",24));Iterator it=a1.iterator();while(it.hasNext()) {//System.out.println(((Person) it.next()).getName()+"::"+((Person) it.next()).getAge());//一条语句不可用两个next() 会取出 1 name 2 age 3 name 4 agePerson p=(Person) it.next();//自定义对象别忘了取出 的时候做强转System.out.println(p.getAge()+"::"+p.getName());}a1.add(5);//a1.add(new Integer(5);}}

package p.bean;public class Person {private String name;private int age;public Person() {super();// TODO Auto-generated constructor stub}public Person(String name, int age) {super();this.name = name;this.age = age;}public String getName() {return name;}public void setName(String name) {this.name = name;}public int getAge() {return age;}public void setAge(int age) {this.age = age;}public static void main(String[] args) {// TODO Auto-generated method stub}}