Question

Question #1 (CLO: 1,2.3) Make a class called Car. Declate its data, model, colour, price Also make a constructor to initialize these data variables. Make a getPrice() method to return price. Make a Child class of Car, called Truck. It has a data variable, weight. Make a constructor that takes all the data variables including weight and those of Car class. Also override getPrice() method, which return 20% discount price if the weight is more than 20,000 else it returns the original price Question #2 (CLO: 1,2.3) Make an abstract class, Animal, with data variables, name, age, sleepHours. Make abstract methods, makeNoise() and Sleep(int hours). Make a constructor to initialize data variables. Make a child class, Elephant, with no data variables. Make a constructor to initialize all data varaibles in the parent class Question #3 (CLO: 1,2.3) Declare an interface called 'Employee' with the following details: A data variables retirementAge with a set value of 60 .A method called generateSalary that returns a double value .A method called getBonus with input parameter of a double type Make two classes called Manager and Staff whih implement Employee interface

Answer 1

Here I am providing the answers for above questions:

Question1:

public class Car
{
   String model,color;
   double price;
   public Car(String model,String color,double price)
   {
       this.model=model;
       this.color=color;
       this.price=price;
   }
   public double getPrice()
{
return price;
}
}
class Truck extends Car
{
int weight;
public Truck(String model,String color,double price,int weight)
{
super(model,color,price); //calling the parent constructro for initializing the values
this.weight=weight;
}
public double getPrice()
{
if(super.price>20000)   
{
double discount=super.price*0.2;
return super.price-discount;
  
}
else
return super.price;
}
public static void main(String[] args)
{
Truck t=new Truck("abc","blue",30000,200); //creating the Object of Truct for checking
System.out.println("Price:"+t.getPrice());
}
}

Question2:

public abstract class Animal
{
String name;
int age,sleepHours;
public abstract void makeNoise();
public abstract void sleep(int hours);
public Animal(String name,int age,int sleepHours)
{
this.name=name;
this.age=age;
this.sleepHours=sleepHours;
}
}
class Elephant extends Animal
{
public Elephant(String name,int age,int sleepHours)
{
super(name,age,sleepHours);
}
public void makeNoise() //implementing the function of parent class
{
System.out.println("make noise function");
}
public void sleep(int hours) //implementing the function of parent class
{
System.out.println("Sleep Hours:"+hours);
}
public static void main(String[] args)
{
Elephant e=new Elephant("abc",20,8); //creating the object of Elephatn class for checking.
e.sleep(e.sleepHours);
}
}

Question3:

public interface Employee //Employee Interface
{
int retirementAge=60;
public double generateSalary();
public double getBonus(double salary);

}
class Manager implements Employee
{
public double getBonus(double salary)
{
return salary+(salary*0.2); //with 20% bonus
}
public double generateSalary()
{
int salary=33000;
return salary;
}
public static void main(String[] args)
{
Manager m=new Manager();
System.out.println("Salary generated for manager:"+m.generateSalary());
}
}
class Staff implements Employee
{
public double getBonus(double salary)
{
return (salary*0.1); //with 10% bonus
}
public double generateSalary()
{
int salary=20000;
return salary;
}
public static void main(String[] args)
{
Staff s=new Staff();
System.out.println("bonus for staff:"+s.getBonus(20000));
}
}

Hoping that the above code will help you...Thank you...