package collection.framework.hash.map.and.hash.table; import java.util.HashMap; import java.util.Hashtable; import java.util.Map; import java.util.Scanner ...

Paid Amount this program based upon Hash Map Collection Frame Work where Email is Key, ref of Customer is value. Highlights of program is - 1)Hash Map API used and in Map reference Hash-Map instance ...

They're not just asking how do you use the HashMap class from the Java Collections API, but they're asking: how does it work internally? The thing is, there's actually a little bit of a trick to this ...