java - Hash map with multiple keys? -

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can have hash map in java looks this?

hashmap<string, string, integer> hmap = new hashmap<string, string, integer>()

my question similar 1 herequestion

i'm newbie java. want know is, best data structure use if need above, if not valid?

create simple class holding 2 string objects:

public class mykey {     private string a;     private string b;      // ... accessors, mutators etc. }

and use it's objects keys in map:

hashmap<mykey, integer> hmap = new hashmap<>()

later, add new entry:

hmap.put(new mykey("a", "b"), 2);

Tomorrow