java List的简单运用

package test;

import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;

public class ListTest {
public void listTest() {

List list = new ArrayList();
//添加元素
list.add(0, "H");
list.add(1, "e");
list.add(2, "l");
list.add(3, "l");
list.add(4, "o");
list.add(5, "!");
Iterator   it   =  list.iterator();  //迭代器
while (it.hasNext()) {//用迭代器遍历list的元素
System.out.print(it.next());

}
}
public static void main(String[] args) {
//测试
ListTest lt = new ListTest();
lt.listTest();
}

}