list,map的疑问

package com.wyl;

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

public class aaa {
	public static void main(String[] args) {
		// location 1
		List<Map<String,Object>> list = new ArrayList<Map<String,Object>>();
		Map<String,Object> map = new HashMap<String,Object>();
		String a = "23";
		System.out.println(a);
		for(int i=0;i<10;i++){
			//location 2
//			Map<String,Object> map = new HashMap<String,Object>();
			map.put("age", "xiaoming:"+i);
			System.out.println("=========:"+i);
			list.add(map);
		}
		Iterator it = list.iterator();
		while(it.hasNext()){
			Map m = (Map)it.next();
			String age =  (String) m.get("age");
			System.out.println("age:"+age);
		}
	}
}