Question

Please forgive this rather basic question, but I’m very new to Java and still finding my way.

I’m writing a web scraper and need to store key:value data in some way. I’ve used HashMaps until now which have been great, except that now I need to allow duplicate values for unique keys. For example, this should be allowed:

Key:Value
abc : 123
cde : 727
efg : 123
hij : 123
klo : 876
opa : 909

Can anyone advise what would be best to use in these circumstances?

Thanks

Answer 1

This is already possible using java.util.HashMap. It’s duplicate Keys that are not possible.

An object that maps keys to values. A map cannot contain duplicate keys; each key can map to at most one value.

From java.util.Map^JavaDoc (implemented by HashMap).