HashMap with multiple values under the same key

Question

Is it possible for us to implement a HashMap with one key and two values. Just as HashMap?

Please do help me, also by telling (if there is no way) any other way to

Answer 1

I use Map for associating multiple values with a key in a Map. This way, I can store multiple values of different types associated with a key. You have to take care by maintaining proper order of inserting and retrieving from Object[].

Example: Consider, we want to store Student information. Key is id, while we would like to store name, address and email associated to the student.

       //To make entry into Map
        Map studenMap = new HashMap();
        String[] studentInformationArray = new String[]{"name", "address", "email"};
        int studenId = 1;
        studenMap.put(studenId, studentInformationArray);

        //To retrieve values from Map
        String name = studenMap.get(studenId)[1];
        String address = studenMap.get(studenId)[2];
        String email = studenMap.get(studenId)[3];