java map放到list中 javamap转list

import java.util.ArrayList; 

import java.util.HashMap; 

import java.util.Iterator; 

import java.util.List; 

import java.util.Map; 


public class ConvertMapToList { 


    /** 

     * 实现将HashMap转换成为ArrayList，并将map的Key 、Value分别存放到两个ArrayList当中 

     * @param args 

     */ 

    public static void main(String[] args) { 

        Map map = new HashMap(); 

        map.put("a", "a1"); 

        map.put("b", "b1"); 

        map.put("c", "c1"); 


        List listKey = new ArrayList(); 

        List listValue = new ArrayList(); 

        Iterator it = map.keySet().iterator(); 

        while (it.hasNext()) { 

            String key = it.next().toString(); 

            listKey.add(key); 

            listValue.add(map.get(key)); 

        } 

        System.out.println("Convert Finished !"); 

        

        //output the context of the ArrayList 

        for(int i =0 ;i<listKey.size();i++){ 

            System.out.print("Key :"+listKey.get(i)); 

            System.out.println("     Value :"+listValue.get(i)); 

        } 

    } 

}