Need help in constructing HashMap of String Key with Map of Strings

Question

I have the list of projects(String) and respective users which I am taking from users as an input :

Project1,User1 Project1,User2 Project1,User3 Project2,User4 Project2,User5

I would like to have this data in the format like:

Project1: User1,User2,User3 Project2:User4,User5

I am trying the same thing to put in hashmap

HashMap<String, HashSet> hsp = new HashMap<String, HashSet>();


HashSet<String> userHash = new HashSet<String>();

Can any one help me to understand how to do it? I am accepting both project name and user name from user.

Jayesh · Accepted Answer · 2014-11-02 06:09:47Z

1

Initialize HashMap and HashSet as follows

    HashSet<String> hashset=new HashSet<String>();
    HashSet<String> hashset2=new HashSet<String>();
    HashMap<String, HashSet> hashmap=new HashMap<String, HashSet>();

Now add elements to hashset

    hashset.add("User1");
    hashset.add("User2");
    hashset.add("User3");

    hashset2.add("User4");
    hashset2.add("User5");

Finally add HashSet to HashMap

    hashmap.put("project1", hashset);
    hashmap.put("project2", hashset2);

So your desired o/p will be as follows

    Hash map is {project2=[User4, User5], project1=[User3, User2, User1]}

answered Nov 2, 2014 at 6:09

Jayesh

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