public class Party { private int guests; /** * return the guests */ public int getGuests() { return guests; } /** * param guests * the guests to set */ public void setGuests(int guests) { this.guests = guests; } public void displayInvitation() { System.out.println(\"Please come to my party\"); } } import java.util.Scanner; public class UseParty { public static void main(String[] args) { Party aParty = new Party(); int guests; Scanner keyboard = new Scanner(System.in); System.out.print(\"Enter number of guests for the party.>>\"); guests = keyboard.nextInt(); aParty.setGuests(guests); System.out.println(\"The party has \" + aParty.getGuests() + \" guest\"); aParty.displayInvitation(); } } public class DinnerParty extends Party { private int dinnerChoice; /** * return the dinnerChoice */ public int getDinnerChoice() { return dinnerChoice; } /** * param dinnerChoice * the dinnerChoice to set */ public void setDinnerChoice(int dinnerChoice) { this.dinnerChoice = dinnerChoice; } } import java.util.Scanner; public class UseDinnerParty { public static void main(String[] args) { Party aParty = new Party(); int guests; int choice; Scanner keyboard = new Scanner(System.in); DinnerParty aDinnerParty = new DinnerParty(); System.out.print(\"Enter number of guests for the party.>>\"); guests = keyboard.nextInt(); aParty.setGuests(guests); System.out.println(\"The party has \" + aParty.getGuests() + \" guest\"); aParty.displayInvitation(); System.out.print(\"Enter number of guests for the dinner party>> \"); guests = keyboard.nextInt(); aDinnerParty.setGuests(guests); System.out .print(\"Enter the menu option-1 for children or 2 for beef >> \"); choice = keyboard.nextInt(); aDinnerParty.setDinnerChoice(choice); System.out.println(\"The dinner party has \" + aDinnerParty.getGuests()); System.out.println(\"menu option \" + aDinnerParty.getDinnerChoice() + \" will be served\"); aDinnerParty.displayInvitation(); } } public class DinnerParty2 extends Party { private int dinnerChoice; /** * return the dinnerChoice */ public int getDinnerChoice() { return dinnerChoice; } /** * param dinnerChoice * the dinnerChoice to set */ public void setDinnerChoice(int dinnerChoice) { this.dinnerChoice = dinnerChoice; } public void displayInvitation() { System.out.println(\"Please come to my dinner party\"); } } import java.util.Scanner; public class UseDinnerParty2 { public static void main(String[] args) { Party aParty = new Party(); int guests; int choice; Scanner keyboard = new Scanner(System.in); DinnerParty2 aDinnerParty = new DinnerParty2(); System.out.print(\"Enter number of guests for the party.>>\"); guests = keyboard.nextInt(); aParty.setGuests(guests); System.out.println(\"The party has \" + aParty.getGuests() + \" guest\"); aParty.displayInvitation(); System.out.print(\"Enter number of guests for the dinner party>> \"); guests = keyboard.nextInt(); aDinnerParty.setGuests(guests); System.out .print(\"Enter the menu option-1 for children or 2 for beef >> \"); choice .

1. public class Party {
private int guests;
/**
* return the guests
*/
public int getGuests() {
return guests;
}
/**
* param guests
* the guests to set
*/
public void setGuests(int guests) {
this.guests = guests;
}
public void displayInvitation() {
System.out.println("Please come to my party");
}
}
import java.util.Scanner;
public class UseParty {
public static void main(String[] args) {
Party aParty = new Party();
int guests;
Scanner keyboard = new Scanner(System.in);
System.out.print("Enter number of guests for the party.>>");
guests = keyboard.nextInt();
aParty.setGuests(guests);
System.out.println("The party has " + aParty.getGuests() + " guest");
aParty.displayInvitation();
}
}
public class DinnerParty extends Party {
private int dinnerChoice;
/**

2. * return the dinnerChoice
*/
public int getDinnerChoice() {
return dinnerChoice;
}
/**
* param dinnerChoice
* the dinnerChoice to set
*/
public void setDinnerChoice(int dinnerChoice) {
this.dinnerChoice = dinnerChoice;
}
}
import java.util.Scanner;
public class UseDinnerParty {
public static void main(String[] args) {
Party aParty = new Party();
int guests;
int choice;
Scanner keyboard = new Scanner(System.in);
DinnerParty aDinnerParty = new DinnerParty();
System.out.print("Enter number of guests for the party.>>");
guests = keyboard.nextInt();
aParty.setGuests(guests);
System.out.println("The party has " + aParty.getGuests() + " guest");
aParty.displayInvitation();
System.out.print("Enter number of guests for the dinner party>> ");
guests = keyboard.nextInt();
aDinnerParty.setGuests(guests);
System.out
.print("Enter the menu option-1 for children or 2 for beef >> ");
choice = keyboard.nextInt();
aDinnerParty.setDinnerChoice(choice);
System.out.println("The dinner party has " + aDinnerParty.getGuests());
System.out.println("menu option " + aDinnerParty.getDinnerChoice()
+ " will be served");

3. aDinnerParty.displayInvitation();
}
}
public class DinnerParty2 extends Party {
private int dinnerChoice;
/**
* return the dinnerChoice
*/
public int getDinnerChoice() {
return dinnerChoice;
}
/**
* param dinnerChoice
* the dinnerChoice to set
*/
public void setDinnerChoice(int dinnerChoice) {
this.dinnerChoice = dinnerChoice;
}
public void displayInvitation() {
System.out.println("Please come to my dinner party");
}
}
import java.util.Scanner;
public class UseDinnerParty2 {
public static void main(String[] args) {
Party aParty = new Party();
int guests;
int choice;
Scanner keyboard = new Scanner(System.in);
DinnerParty2 aDinnerParty = new DinnerParty2();
System.out.print("Enter number of guests for the party.>>");
guests = keyboard.nextInt();
aParty.setGuests(guests);
System.out.println("The party has " + aParty.getGuests() + " guest");
aParty.displayInvitation();
System.out.print("Enter number of guests for the dinner party>> ");

4. guests = keyboard.nextInt();
aDinnerParty.setGuests(guests);
System.out
.print("Enter the menu option-1 for children or 2 for beef >> ");
choice = keyboard.nextInt();
aDinnerParty.setDinnerChoice(choice);
System.out.println("The dinner party has " + aDinnerParty.getGuests());
System.out.println("menu option " + aDinnerParty.getDinnerChoice()
+ " will be served");
aDinnerParty.displayInvitation();
}
}
public class PartyWithConstructor {
int guests;
public PartyWithConstructor() {
System.out.println("Creating a Party");
}
/**
* return the guests
*/
public int getGuests() {
return guests;
}
/**
* param guests the guests to set
*/
public void setGuests(int guests) {
this.guests = guests;
}
public void displayInvitation() {
System.out.println("Please come to my party");
}
}
public class DinnerPartyWithConstructor extends PartyWithConstructor {
private int dinnerChoice;

5. /**
* return the dinnerChoice
*/
public int getDinnerChoice() {
return dinnerChoice;
}
/**
* param dinnerChoice the dinnerChoice to set
*/
public void setDinnerChoice(int dinnerChoice) {
this.dinnerChoice = dinnerChoice;
}
public void displayInvitation() {
System.out.println("Please come to my dinner party");
}
}
public class useDinnerPartyWithConstructor {
public static void main(String[] arg) {
DinnerPartyWithConstructor aDinnerParty = new DinnerPartyWithConstructor();
}
}
public class PartyWithConstructor2 {
int guests;
public PartyWithConstructor2(int guests) {
this.guests=guests;
}
/**
* return the guests
*/
public int getGuests() {
return guests;
}
/**
* param guests the guests to set
*/

6. public void setGuests(int guests) {
this.guests = guests;
}
public void displayInvitation() {
System.out.println("Please come to my party");
}
}
public class DinnerPartyWithConstructor2 extends PartyWithConstructor2 {
private int dinnerChoice;
public DinnerPartyWithConstructor2(int numGuests) {
super(numGuests);
}
/**
* return the dinnerChoice
*/
public int getDinnerChoice() {
return dinnerChoice;
}
/**
* param dinnerChoice
* the dinnerChoice to set
*/
public void setDinnerChoice(int dinnerChoice) {
this.dinnerChoice = dinnerChoice;
}
public void displayInvitation() {
System.out.println("Please come to my dinner party");
}
}
Solution
public class Party {
private int guests;
/**
* return the guests

7. */
public int getGuests() {
return guests;
}
/**
* param guests
* the guests to set
*/
public void setGuests(int guests) {
this.guests = guests;
}
public void displayInvitation() {
System.out.println("Please come to my party");
}
}
import java.util.Scanner;
public class UseParty {
public static void main(String[] args) {
Party aParty = new Party();
int guests;
Scanner keyboard = new Scanner(System.in);
System.out.print("Enter number of guests for the party.>>");
guests = keyboard.nextInt();
aParty.setGuests(guests);
System.out.println("The party has " + aParty.getGuests() + " guest");
aParty.displayInvitation();
}
}
public class DinnerParty extends Party {
private int dinnerChoice;
/**
* return the dinnerChoice
*/
public int getDinnerChoice() {
return dinnerChoice;
}

8. /**
* param dinnerChoice
* the dinnerChoice to set
*/
public void setDinnerChoice(int dinnerChoice) {
this.dinnerChoice = dinnerChoice;
}
}
import java.util.Scanner;
public class UseDinnerParty {
public static void main(String[] args) {
Party aParty = new Party();
int guests;
int choice;
Scanner keyboard = new Scanner(System.in);
DinnerParty aDinnerParty = new DinnerParty();
System.out.print("Enter number of guests for the party.>>");
guests = keyboard.nextInt();
aParty.setGuests(guests);
System.out.println("The party has " + aParty.getGuests() + " guest");
aParty.displayInvitation();
System.out.print("Enter number of guests for the dinner party>> ");
guests = keyboard.nextInt();
aDinnerParty.setGuests(guests);
System.out
.print("Enter the menu option-1 for children or 2 for beef >> ");
choice = keyboard.nextInt();
aDinnerParty.setDinnerChoice(choice);
System.out.println("The dinner party has " + aDinnerParty.getGuests());
System.out.println("menu option " + aDinnerParty.getDinnerChoice()
+ " will be served");
aDinnerParty.displayInvitation();
}
}
public class DinnerParty2 extends Party {
private int dinnerChoice;

9. /**
* return the dinnerChoice
*/
public int getDinnerChoice() {
return dinnerChoice;
}
/**
* param dinnerChoice
* the dinnerChoice to set
*/
public void setDinnerChoice(int dinnerChoice) {
this.dinnerChoice = dinnerChoice;
}
public void displayInvitation() {
System.out.println("Please come to my dinner party");
}
}
import java.util.Scanner;
public class UseDinnerParty2 {
public static void main(String[] args) {
Party aParty = new Party();
int guests;
int choice;
Scanner keyboard = new Scanner(System.in);
DinnerParty2 aDinnerParty = new DinnerParty2();
System.out.print("Enter number of guests for the party.>>");
guests = keyboard.nextInt();
aParty.setGuests(guests);
System.out.println("The party has " + aParty.getGuests() + " guest");
aParty.displayInvitation();
System.out.print("Enter number of guests for the dinner party>> ");
guests = keyboard.nextInt();
aDinnerParty.setGuests(guests);
System.out
.print("Enter the menu option-1 for children or 2 for beef >> ");
choice = keyboard.nextInt();

10. aDinnerParty.setDinnerChoice(choice);
System.out.println("The dinner party has " + aDinnerParty.getGuests());
System.out.println("menu option " + aDinnerParty.getDinnerChoice()
+ " will be served");
aDinnerParty.displayInvitation();
}
}
public class PartyWithConstructor {
int guests;
public PartyWithConstructor() {
System.out.println("Creating a Party");
}
/**
* return the guests
*/
public int getGuests() {
return guests;
}
/**
* param guests the guests to set
*/
public void setGuests(int guests) {
this.guests = guests;
}
public void displayInvitation() {
System.out.println("Please come to my party");
}
}
public class DinnerPartyWithConstructor extends PartyWithConstructor {
private int dinnerChoice;
/**
* return the dinnerChoice
*/
public int getDinnerChoice() {
return dinnerChoice;

11. }
/**
* param dinnerChoice the dinnerChoice to set
*/
public void setDinnerChoice(int dinnerChoice) {
this.dinnerChoice = dinnerChoice;
}
public void displayInvitation() {
System.out.println("Please come to my dinner party");
}
}
public class useDinnerPartyWithConstructor {
public static void main(String[] arg) {
DinnerPartyWithConstructor aDinnerParty = new DinnerPartyWithConstructor();
}
}
public class PartyWithConstructor2 {
int guests;
public PartyWithConstructor2(int guests) {
this.guests=guests;
}
/**
* return the guests
*/
public int getGuests() {
return guests;
}
/**
* param guests the guests to set
*/
public void setGuests(int guests) {
this.guests = guests;
}
public void displayInvitation() {
System.out.println("Please come to my party");

12. }
}
public class DinnerPartyWithConstructor2 extends PartyWithConstructor2 {
private int dinnerChoice;
public DinnerPartyWithConstructor2(int numGuests) {
super(numGuests);
}
/**
* return the dinnerChoice
*/
public int getDinnerChoice() {
return dinnerChoice;
}
/**
* param dinnerChoice
* the dinnerChoice to set
*/
public void setDinnerChoice(int dinnerChoice) {
this.dinnerChoice = dinnerChoice;
}
public void displayInvitation() {
System.out.println("Please come to my dinner party");
}
}