Question

import javax.swing.JOptionPane;

public class Animal {
   private int numTeeth = 0;
   private boolean spots = false;
   public int weight = 0;
  
   public Animal(int numTeeth, boolean spots, int weight){
       this.numTeeth =numTeeth;
       this.spots = spots;
       this.weight =weight;
   }
  
   public int getNumTeeth(){
       return numTeeth;
   }

   public void setNumTeeth(int numTeeth) {
       this.numTeeth = numTeeth;
   }
  
   public boolean getSpots() {
       return spots;
   }

   public void setSpots(boolean spots) {
       this.spots = spots;
   }

   public int getWeight() {
       weight = Integer.parseInt(JOptionPane.showInputDialog("Enter the lion's weight "));
       return weight;
   }

   public void setWeight(int weight) {
       this.weight = weight;
   }
  

}

----

Follow these steps:

● Modify the existing Animal.java file for this task.

● Using the Lion class template as shown in the pdf file, expand the class to have features specific to a lion.

● Add a field for lion type. ● Add a method in this class which sets the lion type based on it’s weight (note that the weight is a derived field from the superclass).

● If they weight is less than 80kg, it’s type should be a cub. If less than 120kg, it should be female. And if greater than 120kg.

● Print out the type of lion.

● Compile, save and run your file.

● Modify the existing Animal.java file for this task.

● Create a class called ‘Cheetah’ that:

○ Inherits from the Animal class.

○ Makes use of at least one static field which needs to have a static setter and getter.

○ Contains a constructor.

○ Contains a toString() method.

○ Has an array as one of it’s fields.

● Create an application class, and within it create a Cheetah object and print it out with the main method.

● Compile, save and run your file.

Answer 1

Animal.java

public class Animal {
   // instance variables
   private int numTeeth = 0;
   private boolean spots = false;
   private int weight = 0;
   private String lionType;
   // parameterized constructor
   public Animal(int numTeeth, boolean spots, int weight) {
       this.numTeeth = numTeeth;
       this.spots = spots;
       this.weight = weight;
       if(this.weight<80)
           lionType="Cub";
       else
           if(this.weight<120)
               lionType="Female";
           else
               lionType="Male";
   }
   // setter and getter methods
   public String getLionType() {
       return lionType;
   }

   public void setLionType() {
       if(weight<80)
           lionType="Cub";
       else
           if(weight<120)
               lionType="Female";
           else
               lionType="Male";
   }

   public int getNumTeeth(){
       return numTeeth;
   }

   public void setNumTeeth(int numTeeth) {
       this.numTeeth = numTeeth;
   }

   public boolean getSpots() {
       return spots;
   }

   public void setSpots(boolean spots) {
       this.spots = spots;
   }

   public int getWeight() {
       return weight;
   }

   public void setWeight(int weight) {
       this.weight = weight;
   }

}

Cheetah.java

public class Cheetah extends Animal {
   // static variable
   private static int speedMPH;
   // parameterized constructor
   public Cheetah(int numTeeth, boolean spots, int weight,int speed) {
       // calls super class constructor
       super(numTeeth, spots, weight);
       speedMPH=speed;
   }
   // setter and getter methods
   public static int getSpeedMPH() {
       return speedMPH;
   }

   public static void setSpeedMPH(int speedMPH) {
       Cheetah.speedMPH = speedMPH;
   }
   @Override
   public String toString() {
       return "*** Cheetah ***"
               +"\nNumber of teeth: "+getNumTeeth()
               +"\nSpots: "+getSpots()
               +"\nWeight: "+getWeight()
               +"\nLion type: "+getLionType()
               +"\nSpeed: "+getSpeedMPH()+"mph";
   }
}

Application.java

public class Application {
   public static void main(String[] args) {
       // create Cheetah class object
       Cheetah cheetah=new Cheetah(24, true, 145, 240);
       // print object using toString() method
       System.out.println(cheetah);
   }
}

Output