package cn.stat.p3.conection.demo;

import java.util.ArrayList;

import java.util.Collection;

import java.util.Iterator;

public class conectionDemo {

    /**

     * @param args

     */

    public static void main(String[] args) {

        // TODO Auto-generated method stub

      Collection cl=new ArrayList();

   show(cl);

    }

    public static void show(Collection col)

    {

        col.add("aaa");

        col.add("bbb");

        col.add("ccc");

        System.out.println(col);

        Iterator it=col.iterator();

        while(it.hasNext())

        {

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

        }

    }

}

package cn.stat.p4.list.demo;

import java.util.ArrayList;

import java.util.Iterator;

import java.util.List;

import java.util.ListIterator;

import java.util.LinkedList;

public class listDemo {

    public static void main(String[] args) {

        // TODO 自动生成的方法存根

        LinkedList<String> nlist=new LinkedList<String>();

show(nlist);

    }

    private static void show(LinkedList nlist) {

        // TODO 自动生成的方法存根

        nlist.add("aaa");

        nlist.add("bbb");

        nlist.add("ccc");

        System.out.println(nlist);

        nlist.add(1,"ddd");

        System.out.println(nlist);

        ListIterator it=nlist.listIterator();

        while(it.hasNext())

        {

            Object obj=it.next();

            if(obj.equals("bbb"))

            {

                it.add("qqq");

            }

        }System.out.println(nlist);

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

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

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

        /*

        System.out.println(nlist);

        System.out.println("remove="+nlist.remove(2));

        nlist.set(2, "qqq");

        System.out.println();

        System.out.println(nlist.get(2));

*/

    }

    public listDemo() {

        super();

        // TODO 自动生成的构造函数存根

    }

}