Java中的List接口实现类解析

import java.util.*;
public class ListDemo {
    public static void main(String args[]){
        Collection c1 = new ArrayList();//实例化一个具体的子类对象
        for(int i=0;i<5;i++){
            c1.add(new Integer(i));
        }//循环添加5个整型类对象
        System.out.println("c1:"+c1);
        Collection c2 = new ArrayList();
        c2.addAll(c1);
        c2.remove(new Integer(3));
        c2.add("hehe");
        System.out.println("c2:"+c2);
        Iterator it = c2.iterator();
        while(it.hasNext()){
            Object obj = it.next();
            System.out.println("Iterator遍历c2  "+obj+"\t");
        }
    }
}

import java.util.LinkedList;
public class LinkedListDemo {
    public static void main(String args[]) {
        LinkedList linkedList = new LinkedList();
        linkedList.add("F");
        linkedList.add("B");
        linkedList.add("D");
        linkedList.add("E");
        linkedList.add("C");
        System.out.println("显示初始化后linklist的内容:" + linkedList);
        linkedList.addLast("Z");
        linkedList.addFirst("AO");
        linkedList.add(1, "AI");
        System.out.println("显示添加操作后linkedList内容：" + linkedList);
        linkedList.remove("F");
        linkedList.remove(2);
        System.out.println("显示删除操作后的linkedList内容：" + linkedList);
        linkedList.removeFirst();
        linkedList.removeLast();
        System.out.println("显示删除操作后linkList内容：" + linkedList);
        Object object = linkedList.get(2);
        //修改内容
        linkedList.set(2, (String) object + "Chaanged");
        System.out.println("现实操作后linklist内容：" + linkedList);
    }
}

import java.util.Vector;
public class VectorDemo {
    public static void main(String args[]){
        Vector v = new Vector();
        v.add("one");
        v.add("two");
        v.add("three");
        System.out.println("显示向量初始值："+v.toString());
        v.insertElementAt("zero",0);
        v.insertElementAt("oop",3);
        System.out.println("显示插入后向量值："+v.toString());
        v.setElementAt("three",3);
        v.setElementAt("four",4);
        System.out.println("显示修改后元素向量值："+v.toString());
        v.removeAllElements();
        System.out.println("显示全删除后向量值："+v.toString());
    }
}