2. Collections framework HashMap, ArrayList internal implementation What is hashCode? How is get operation performed? Equals() vs HashCode? Class Employee { Name; Age; Salary;} HashMap map; Can you add Employee to the map now? What is the pre-requisite? What needs to be done? Write code for equals() overriding in this case? Use of hashcode?

Question

2.	Collections framework
HashMap, ArrayList internal implementation
What is hashCode? How is get operation performed?  Equals() vs HashCode? 

Class Employee
{ Name; Age; Salary;}

HashMap<Employee,Big Int> map;
Can you add Employee to the map now? What is the pre-requisite? What needs to be done?
Write code for equals() overriding in this case?
Use of hashcode?

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