Question

1. Create a class named Pizza with data fields dor desceiption ( such as sasuage and onion) and price. include a constructor fhay requires arguments for borh fields ans a method to diplay the data. Create a subclass names DelicedPizza that inherits from Pizza bit adds a delivery fee and a delicery address. The description, price, and delicery address are required as arguments to the constructor. The delivery fee is $3 if the pizza ordered cost more that $15; otherwise it is $5. Write an application that instantiates at least two objects of each type, and display the calues. Save the files as Pizza.java, DeliveryPizza.java and DemoPizzas.java.

2. Create a class named Rock that acts as a superclass for rock samples collected and catalogued by a natural history musuem. The Rock class contains fields for a bumber of samples, a description of the type of rock, and the weight. The Rock constructor sets the deacription value to Unclassified. Include get methods for each field. Create three child classes named IgneousRock, Sedimentary Rock, and MetamorphicRock. The constructors for these classes require parameters for the sample number and weight. Search the Internet for a brief desceiption of each rock thoe and assign it to the description field. Create an application that instantiates an object of each tyoe and demonstrate that the methods work appropriatelt. Save the files as Rock.java, IgnsousRock.jave, SedumentaryRock.java, MetamorphicRock.java, and DemoRocks.java.

CIST 2371 Lab 9 DROP BOX ASSIGNMENT- Inheritance Instructions: 1. Create a class named Pizza with data fields for description (such as sausage and onion) and price. Include a constructor that requires arguments for both fields and a method to display the data. Create a subclass named DeliveryPizza that inherits from Pizza but adds a delivery fee and a delivery address. The description, price, and delivery address are required as arguments to the constructor. The delivery fee is $3 if the pizza ordered costs more than $15; otherwise it is $5. Write an application that instantiates at least two objects of each type, and display the values. Save the files as Pizza.java, DeliveryPizza.java, and Demo Pizzas.java. Sample output: sausage and onion pizza Price: $14.99 green pepper pizza Price: $12.99 cheese pizza Price: $11.99 Deliver to: 22 Acorn. Fee is 5.0 pepperoni, sausage, and pineapple pizza Deliver to: 47 Oak. Fee is 3.0 Price: $19.5 2. Create a class named Rock that acts as a superclass for rock samples collected and catalogued by a natural history museum. The Rock class contains fields for a number of samples, a description of the type of rock, and the weight of the rock in grams. Include a constructor that accepts parameters for the sample number and weight. The Rock constructor sets the description value to Unclassified. Include get 80 11 F7 SVO * $ 4 % 5 & 7 3 6 8 9 0

Answer 1

1)

/// Pizza.java ///

public class Pizza
{
   public String description;
   public double price;
   public Pizza() {}
   public Pizza(String desc,double pri)
   {
       this.description=desc;
       this.price=pri;
   }
   public String toString()
   {
       return this. description+" Price: $"+this.price;
   }
}

/// DeliveryPizza.java ///

public class DeliveryPizza extends Pizza
{
   public double fee;
   public String address;
   public DeliveryPizza(String desc,double pri,String add)
   {
       super(desc, pri);
       this.address=add;
       if(super.price>15.0)
       {
           this.fee=3.0;
       }
       else
       {
           this.fee=5.0;
       }
   }
   public String printDetails()
   {
       return super.toString()+"\n\tDeliver to: "+this.address+". Fee is: "+this.fee;
   }
}

/// DemoPizzas.java ///

public class DemoPizzas
{
   public static void main(String[] args)
   {
       Pizza pizza=new Pizza("susage and onion pizza",14.99);
       System.out.println(pizza.toString());
       Pizza pizza1=new Pizza("green pepper pizza",12.99);
       System.out.println(pizza1.toString());
       DeliveryPizza deliveryPizza=new DeliveryPizza("cheese pizza",11.99,"22 Acron");
       System.out.println(deliveryPizza.printDetails());
       DeliveryPizza deliveryPizza1=new DeliveryPizza("pepproni,susage and pineapple pizza",19.5,"47 Oak");
       System.out.println(deliveryPizza1.printDetails());
   }
}

Code Screenshots:-

Pizza.java

public class Pizza Ç{ public String description; public double price; public Pizza () {} public Pizza (String desc, double pri) { 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 this.description=desc; this.price=pri; } public String toString() { return this. description+" Price: $"+this.price; } }

DeliveryPizza.java

{ { 1 public class DeliveryPizza extends Pizza 2 9 { public double fee; public String address; public DeliveryPizza (String desc, double pri, String add) 6 super (desc, pri); 8 this.address=add; 9 if (super.price>15.0) 10 11 this.fee=3.0; 12 13 else 14 15 this.fee=5.0; 16 17 18 public String printDetails() 19 20 return super.toString() + "\n\tDeliver to: "+this.address+". Fee is: 21 22 } { } } { "+this.fee; }

DemoPizzas.java

public class Demo Pizzas 2 { public static void main(String[] args) { 8 9 10 11 12 13 14 Pizza pizza=new Pizza ("susage and onion pizza", 14.99); System.out.println (pizza.toString()); Pizza pizzal=new Pizza ("green pepper pizza", 12.99); System.out.println(pizzal.toString()); DeliveryPizza deliveryPizza=new DeliveryPizza ("cheese pizza", 11.99,"22 Acron"); System.out.println(deliveryPizza.printDetails()); DeliveryPizza deliveryPizzal=new DeliveryPizza ("pepproni, susage and pineapple pizza", 19.5,"47 Oak"); System.out.println(deliveryPizzal.printDetails());

Output:-

C. C:\Windows\SYSTEM32\cmd.exe susage and onion pizza Price: $14.99 green pepper pizza Price: $12.99 cheese pizza Price: $11.99 Deliver to: 22 Acron. Fee is: 5.0 pepproni, susage and pineapple pizza Price: $19.5 Deliver to: 47 Oak. Fee is: 3.0 (program exited with code: 0) Press any key to continue .

2)

/// Rock.java ///

public class Rock
{
   int noOfsamples;
String typeOfrock;
double weightOfrock;
public Rock(int noOfsamples,double weightOfrock)
{
       this.noOfsamples=noOfsamples;
this.typeOfrock="Unclassified";
this.weightOfrock=weightOfrock;
}
public void setnoOfsamples(int noOfsamples)
{
       this.noOfsamples = noOfsamples;
}
   public int getnoOfsamples()
   {
       return this.noOfsamples;
   }   
   public void setweightOfrock(double weightOfrock)
   {
       this.weightOfrock = weightOfrock;
   }
   public double getweightOfrock()
   {
       return this.weightOfrock;
   }
   public String toString()
   {
       return "Samples # "+noOfsamples+" weight "+weightOfrock+"\nDescription: "+typeOfrock+"\n";
   }
}

/// MetamorphicRock.java ///

public class MetamorphicRock extends Rock
{
   MetamorphicRock(int noOfsamples,double weightOfrock)
{
       super(noOfsamples, weightOfrock);
   }
   public void settypeOfrock(String typeOfrock)
   {
       super.typeOfrock = typeOfrock;
}
public String gettypeOfrock()
{
       return super.typeOfrock;
   }
}

///SedimentaryRock.java ///

public class SedimentaryRock extends Rock
{
   public SedimentaryRock(int noOfsamples,double weightOfrock)
{
       super(noOfsamples, weightOfrock);
}
public void settypeOfrock(String typeOfrock)
{
       super.typeOfrock = typeOfrock;
   }
   public String gettypeOfrock()
   {
       return super.typeOfrock;
   }
}

/// IgneousRock.java ///

public class IgneousRock extends Rock
{
   public IgneousRock(int noOfsamples,double weightOfrock)
{
       super(noOfsamples, weightOfrock);
}
public void settypeOfrock(String typeOfrock)
{
super.typeOfrock = typeOfrock;
}
   public String gettypeOfrock()
   {
       return super.typeOfrock;
   }
}

/// DemoRocks.java ///

public class DemoRocks
{
   public static void main(String[] args)
{
       IgneousRock obj1=new IgneousRock(123,4.5);
obj1.settypeOfrock("Igneous rocks are crystalline solids \nwhich form directly from the cooling of magma");
System.out.println(obj1.toString());
SedimentaryRock obj2= new SedimentaryRock(234,14.9);
obj2.settypeOfrock("Sedimentary rocks are called secondary,\nbecause they are often the result of the accumulation \nof small pieces broken off of pre-existing rocks");
System.out.println(obj2.toString());
       MetamorphicRock obj3=new MetamorphicRock(345,7.0);
obj3.settypeOfrock("Any rock can become a metamorphic rock \nif the rock is moved into an environment in which the \nminerals which make up the rock become unstable and \nout of equilibrium with the new environmental condition");
System.out.println(obj3.toString());
   }
}

Output:-

6:8. C:\Windows\SYSTEM32\cmd.exe Samples # 123 weight 4.5 Description: Igneous rocks are crystalline solids which form directly from the cooling of magma Samples # 234 weight 14.9 Description: Sedimentary rocks are called secondary, because they are often the result of the accumulation of small pieces broken off of pre-existing rocks Samples # 345 weight 7.0 Description: Any rock can become a metamorphic rock if the rock is moved into an environment in which the minerals which make up the rock become unstable and out of equilibrium with the new environmental condition (program exited with code: 0) Press any key to continue

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