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I need nested hashmap program(hashmap of hashmap).

 
harikrishnan venkatesan
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HashMap Example :

output :

Elements of Map
{Raman=04, HarishOoty=03, Muthu=02, Hari=01}

Its Working Properly........... I need nested hashmap program(hashmap of hashmap).
Can anyone update this program to nested hashmap java program............
 
Jelle Klap
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What have you tried so far? The program you posted puts key/value pairs into a HashMap, where both the key and the value are String's.
Have you tried putting a key value pair into a HashMap the uses a Stirng as a key and another HashMap as its associated value?
If you have, what problems did you encounter?

Oh, by the way, welcome to Javaranch!
 
Winston Gutkowski
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harikrishnan venkatesan wrote:Its Working Properly........... I need nested hashmap program(hashmap of hashmap).

Any particular reason? It seems like quite an odd structure to me. A HashMap of Lists on the other hand....

Can anyone update this program to nested hashmap java program............

'Fraid that's not how it works here. You need to ShowSomeEffort (←click) and try it yourself first; then come back if you have any problems.

I will give you a piece of advice though:
Get used to declaring the types of your maps and collections. For example, the Map you've described should be a
HashMap<String, String>, not just a
HashMap
so it looks like you'll need to declare a
HashMap<<K, HashMap<String, String>>, where 'K' is the type of key you decide on for your "outer" Map.

I also think it might be better to back up and describe what you want, rather than how you want to do it.
Is this some sort of Multimap?

Winston
 
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