Question

assume there is a registration class already written for you, where dictionary<string,Student > collection is maintained . Assume students are already in the studentdictionary variable with unique last names as key, the dictionary is at the class level

Answer 1

import java.util.Dictionary;

class Student {
    private String firstName, lastName;

    public Student() {
    }

    public Student(String firstName, String lastName) {
        this.firstName = firstName;
        this.lastName = lastName;
    }

    public String getFirstName() {
        return firstName;
    }

    public void setFirstName(String firstName) {
        this.firstName = firstName;
    }

    public String getLastName() {
        return lastName;
    }

    public void setLastName(String lastName) {
        this.lastName = lastName;
    }
}

class Registration {
    private Dictionary<String, Student> collection;
}