如何使我的HashTable适用于特定类型

Question

I need to create a HashTable for a project.

Here is how I define what my HashTable is:

public class StudentHashTable<Name, DateOfBirth> {

}

The way you would create my HashTable is the following:

StudentHashTable<String,Integer> hashMap = new StudentHashTable<String,Integer>();

As it stands now, it would actually work for any object that has a key of String type and a value of Integer type. What do I need to think about so I can force the HashTable to only accept objects of type Student that has key of String type and value of Integer type?

Answer 1

If you want your customized HashMap to only accept class Student, which is a very odd request as collections should be generic usually, then just do the following. make the setters only work with class Student. This way you are guaranteed to not be able to accept anything except what you want.

Example:

public void put(Student student){...}

public void putAll(Student... students){...}