package cn.stat.p9.map.demo;

import java.util.ArrayList;

public class Listfor {

    /**

     * @param args

     */

    public static void main(String[] args) {

        // TODO Auto-generated method stub

        ArrayList<String> al=new ArrayList<String>();

        al.add("asdf");

        al.add("qwer");

        al.add("zxcv");

        al.add("yuio");

        for(String s : al)

        {

            System.out.println(s);

        }

    }

}

//foreach 遍历map集合，要先转成单列的set

        Map<Integer,String> al=new TreeMap<Integer,String>();

        al.put(12,"asdf");

        al.put(32,"qwer");

        al.put(65,"zxcv");

        al.put(10,"yuio");

        for(Integer key : al.keySet())

        {

            String value=al.get(key);

            System.out.println("key="+value);

        }

        for(Map.Entry<Integer, String> me : al.entrySet())

        {

            Integer key =me.getKey();

            String value=me.getValue();

            System.out.println(key+" "+value);

        }