How to put a hashmap in a hashmap

How do you make a Hashmap inside a Hashmap?

 

Should be something like this:
Map<Object, HashMap<Object, Object>> inceptionMap = new HashMap<Object, HashMap<Object, Object>>();

 

Hashmapception :O

 

Why would you ever need to put a hashmap inside of a hashmap lol.

Just create your own object and use that inside the hashmap. So much easier and can store more data.

 

aufdemrand
That's pretty awesome

(nobody saw that fail...) lol

 

This. If you need to store more than two variables together, you may aswell make another class and have that store variables. You can then put the object from that class into a HashMap or List.

 

because Im making a plugin where players can send points to another player so

Bob: /give jill 10 points
Jill /give Bob 15 points

and I want them to be able to look up there history of points given to and from another player
so bob sees he gave jill 10 points and jill has given him 15 and maybe Jack has given him 5 but he has given jack 0

 

You can just use a custom class then, if you'll only search by sender, you store the sender as key and then in the custom class store the reciever's name and the amount sent.

Code:

HashMap<String, SentPoints> = new HashMap<String, SentPoints();

// ...

public class SentPoints
{
    private String reciever;
    private int points;

    public SentPoints(String reciever, int points)
    {
         this.reciever = reciever;
         this.points = points;
    }

    // also make getters for reciever and points or just make the variables public and use them directly
}

 

Yeah, use a seperate class to store all the data, then you can just create new instances of it for different players. It will help you much more farther down the road when/if you try to add more functionality.