Interaction between more than one hashmap

[Al-Hinai]

Hi ,,

I have three hash maps [host-delivery-predicatability, contact-duration, and contact-counter]
everyone of them store host-id in their key set. But in the value lists:
delivery-predicatability hash map store delivery-predicatability value
contact-duration hash map store contact duration of that each host
contact-counter hash map store contact counter

In the following method:
/**
* Updates delivery predictions for a host.
* <CODE>P(a,b) = P(a,b)_old + (1 - P(a,b)_old) * P_INIT</CODE>
* @param host The host we just met
*/
private void updateDeliveryPredFor(DTNHost host) {
double oldValue = getPredFor(host);
System.out.println("old delivery" + oldValue);
double newValue = oldValue + (1 - oldValue) * P_INIT ;
System.out.println("new delivery" + newValue);
preds.put(host, newValue);
System.out.println("pred map" + preds);
}

I want to use the host-id of delivery-predicatability hash map to get delivery-predicatability for a host and I want to use the key value of that host-id to get the matching detail of that host-id from the other two hash maps contact-duration and contact-counter. How can I do so?
r

[Fubarable]

Why not create a class that ties all the information together with four fields representing: host-id, host-delivery-predicatability, contact-duration, and contact-counter? Then you can have one HashMap that maps host-id's with objects of this new class.

[Al-Hinai]

Why not create a class that ties all the information together with four fields representing: host-id, host-delivery-predicatability, contact-duration, and contact-counter? Then you can have one HashMap that maps host-id's with objects of this new class.

Thanks Fubarable for your replay. But how can I tie them together in the new class?

[Fubarable]

Thanks Fubarable for your replay. But how can I tie them together in the new class?

Please have a look at the Java tutorials: The Really Big Index. Check out the introductory chapters and the "Classes and Objects" chapters.