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Object[] obj = list.toArray();

for(Object s : obj){

　　System.out.println((String) s);

}

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for(int i = 0;i<list.size();i++){

　　System.out.println(list.get(i));

}

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ListIterator it = list.listIterator();

　　while(it.hasNext()){

　　 System.out.println(it.next());

}

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import java.util.ArrayList;

import java.util.Collection;

import java.util.Iterator;

import java.util.List;

public class paseWork {

public static void main(String[] args) {

CollectionTest();

}

public static void CollectionTest(){

Collection <String>collection = new ArrayList<String>();

collection.add("初一");

collection.add("小二");

collection.add("张三");

collection.add("李四");

collection.add("王五");

//1.集合转为数组 Object[]

Object[] objectsArrC = collection.toArray();

for (Object object : objectsArrC) {

String string = (String) object; // 将对象强制转换为字符串输出

System.out.println(string);

}

//2.get()方法获取元素

for (int i = 0;i < collection.size();i++){

//get()只能用在list集合中，所以这里需要转换形式

System.out.println(((ArrayList<String>) collection).get(i));

}

//3.迭代器

Iterator<String> it = collection.iterator();

while(it.hasNext()){

System.out.println(it.next());

}

}

}

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import java.util.ArrayList;

import java.util.Collection;

import java.util.List;

import java.util.ListIterator;

public class paseWork {

public static void main(String[] args) {

ListTest();

}

public static void ListTest(){

List<String> list = new ArrayList<String>();

list.add("初一");

list.add("小二");

list.add("张三");

list.add("李四");

list.add("王五");

//1.集合转为数组 Object[]

Object[] objectsArrL = list.toArray();

for (Object object : objectsArrL) {

String string = (String) object; //将对象强制转换为字符串输出

System.out.println(string);

}

//2.通过 get() 方法

for (int i = 0; i < list.size(); i++) {

System.out.println(list.get(i));

}

//3.迭代器

ListIterator<String> iterator = list.listIterator();

while(iterator.hasNext()){

System.out.println(iterator.next());

}

}

}