Question

1. In Java, lead the class Person to store the name a person we discuss in the class (source is Person.java attached in the assignment). As we can see that the methods we included merely set the name and print the name of a person. Redefine the class person so that, in addition to what existing Class does, you can

• Set the last name only.
• Set the first name only.
• Set the middle name.
• Check whether a given last name is the same as the last name of this person.
• Check whether a give first name is the same as the first name of this person.
• Check whether a given middle name is the same as the middle name of this person.

2. Add the method equals that returns true if two objects contains the same first and last name.

3. Add the method makeCopy that copies the instance of variables of a Person object into another Person object.

4. Add the method getCopy that creates and returns the address of the object, which is a copy of another Person Object.

5. Write the definition of the methods of the class Person to implement the operation of this Class

6. Write a program that tests various operation of the Class Person.

Answer 1

import java.io.*;
import java.util.*;
public class Main
{
   public static void main(String[] args) {
       Person myself = new Person("Ram", "Prasad", "Bismil");
      
       myself.setFirstName("Shyam");
       myself.setMiddleName("Prasad"); /// testing by passing same middle name;
       myself.setLastName("Sunder");

       Person you = myself.getCopy(); //// test for makeCopy() as well as getCopy()

       System.out.println(myself.equals(you));
   }
}

class Person
{
   String firstName;
   String middleName;
   String lastName;

   ///// default constructor ////
   public Person()
   {
      
   }

   //// parameterized constructor //////
   public Person(String firstName, String middleName, String lastName)
   {
       this.firstName = firstName;
       this.lastName = lastName;
       this.middleName = middleName;
   }

   ///// getter for full name /////
   public String getName()
   {
       return firstName + " " + middleName + " " + lastName;
   }

   //// setter for first name /////
   public void setFirstName(String firstName)
   {
       ////// if given first name is same as already stored first name, this block will execute
       if(firstName.equals(this.firstName))
       {
           System.out.println("given first name is same as the already stored firstName");
           return;
       }
       this.firstName = firstName;
   }  

   //// setter for middle name /////
   public void setMiddleName(String middleName)
   {
       ////// if given middle name is same as already stored middle name, this block will execute
       if(middleName.equals(this.middleName))
       {
           System.out.println("given middleName name is same as the already stored middleName");
           return;
       }
       this.middleName = middleName;
   }  

   //// setter for last name /////
   public void setLastName(String lastName)
   {
       ////// if given last name is same as already stored last name, this block will execute
       if(lastName.equals(this.lastName))
       {
           System.out.println("given last name is same as the already stored last name");
           return;
       }
       this.lastName = lastName;
   }

   /////// equals method to comapre two Person objects /////////
   public boolean equals(Person obj)
   {
       if(this.firstName.equals(obj.firstName) && this.lastName.equals(obj.lastName))
           return true;
       else
           return false;
   }  

   ////// makeCopy function to create a copy of current object
   public void makeCopy(Person obj)
   {
       obj.firstName = this.firstName;
       obj.middleName = this.middleName;
       obj.lastName = this.lastName;
   }

   ////// method to create a copy of current object and return to the caller
   public Person getCopy()
   {
       Person obj = new Person();
       this.makeCopy(obj);
       return obj;
   }
}