Java 迭代器演示

import java.util.ArrayList;import java.util.Collection;import java.util.Iterator;public class IteratorDemo {public static void main(String[] args) {// TODO Auto-generated method stubCollection coll=new ArrayList();coll.add("abc1");coll.add("abc2");coll.add("abc3");coll.add("abc4"); //使用了Collection 中的iterator() 方法 是为了获取集合中的迭代器对象Iterator it=coll.iterator();/*while(it.hasNext()) {System.out.println(it.next()); }*/for(Iterator iterator=coll.iterator();it.hasNext()) {System.out.println(it.next());}System.out.println(it.next());System.out.println(it.next());System.out.println(it.next());System.out.println(it.next());System.out.println(it.next());//java.util.NoSuchElementExceptionSystem.out.println(it.next());}}