Getting top 10 values

Hello All,

Im curious on how to get the top ten values out of a HashMap. Any help here?

Thanks,

MrMcaustin1

 

mcaustin1 Depends how you're sorting it.
I'd get a list of all of the values (map.values() I think) and use Collections.sort() to order them. From there, you can get the top 10.

 

Map<String, Integer> OnlineKills = new HashMap<String, Integer>();
DJSkepter

Thats how the hashmap is used.

In case you need the code here it is: http://pastebin.com/5cUi5XD2

Anyone?

EDIT by Moderator: merged posts, please use the edit button instead of double posting.

 

mcaustin1

 

You cant use .sort() with a HashMap. Any other sugestions?
teej107
DJSkepter

 

The solution they were advocating was Collections.sort(map.values()) - not Collections.sort(map). Mind you - this is only an effective solution if you only need the 10 values - and not the 10 keys they were associated with.

 

Sorry this my fault I want to sort the HashMap by the integers it contains. So basically I am making a leaderboard.

 

OK. In that case, a HashMap is probably not the correct storage type for you.

 

What would I use then?

 

mcaustin1 Configs, property files, an SQL database.

 

How would you use a config?

 

mcaustin1 http://jd.bukkit.org/rb/apidocs/org/bukkit/configuration/file/FileConfiguration.html

 

TreeMap

 

How would you use this?

 

mcaustin1 What IDE do you use?

 

A TreeMap definitely is the way to go if you constantly need to get the top 10.

 

Okay, I dont know how to use TreeMaps any examples?

Eclipse

 

mcaustin1 https://docs.oracle.com/javase/7/docs/api/java/util/TreeMap.html

 

_Filip
How would I do this ex. I am storing players names and how many kills they got. How would I sort that?

 

Don't ask to be spoon fed. There is enough documentation on Oracle's APIs to allow you to do this without someone writing your code for you.

 

Crud41
I follow the documentation on the Oracle's API for TreeMap and it still errors out. Thats what I am asking for help.

 

[quote uid=90783158 name="mcaustin1" post=2880555]Crud41
I follow the documentation on the Oracle's API for TreeMap and it still errors out. Thats what I am asking for help.[/quote]

Then search through forums.
<Edit by Moderator: Redacted bit url>

 

Errors? Prove it! I don't believe you. No one is going to help if you aren't more descriptive.

 

nvm Someone else is helping me!

 

you would want to sort it and then simply get the top 10 values (that is all i thought of when i saw the title this is my guess ) like you could even use a for(int i = 0; i < 11; i++){hashmap} after it is sorted (Remember this is just a guess)