HashMap with multiple values under the same key

Question

Is it possible for us to implement a HashMap with one key and two values. Just as HashMap?

Please do help me, also by telling (if there is no way) any other way to

Answer 1

 import java.io.*;
 import java.util.*;

 import com.google.common.collect.*;

 class finTech{
public static void main(String args[]){
       Multimap multimap = ArrayListMultimap.create();
       multimap.put("1","11");
       multimap.put("1","14");
       multimap.put("1","12");
       multimap.put("1","13");
       multimap.put("11","111");
       multimap.put("12","121");
        System.out.println(multimap);
        System.out.println(multimap.get("11"));
   }                                                                                            
 }                                                                    

Output:

     {"1"=["11","12","13","14"],"11"=["111"],"12"=["121"]}

      ["111"]

This is Google-Guava library for utility functionalities. This is the required solution.