Create A Dog Runner Class Using A Dog Class

Create A Dog Runner Class Which Uses A Dog Class Which You Createdog

Create a dog runner class which uses a Dog class which you create. Dog class must: 1. Have dog characteristics of Name, Color, Weight 2. Be able to construct a default dog of name "Fido", color brown and weight 10 (pounds). 2.a. Construct a dog with only name (default brown and 10 pounds). 2.b. Construct a dog with all 3 parameters. 3. Dog must be able to sit (response is "arrrff"). 4. Must be able to examine the 3 characteristics ('getters') 5. Must be able to change the 3 dog characteristics ('setters') 6. Demonstrate all the above from the dog runner (or 'dog tester') class. 7. Create a subclass "poodle" and add dog breed in the constructor(s) using super. 8. Use toStrings in Dog & Poodle class.

Paper For Above instruction

Introduction

The assignment requires designing a Dog class with specific properties, constructors, behaviors, and subclasses, along with a runner class to demonstrate its usage. Additionally, a subclass 'Poodle' should be created, inheriting from Dog and adding breed information. This document discusses the design, implementation, and demonstration of these classes in Java, providing comprehensive code snippets and explanations.

Dog Class Design

The Dog class encapsulates the fundamental attributes of a dog: name, color, and weight. It provides multiple constructors to allow flexible instantiation, including default and parameterized options. Methods to sit (produce a bark sound), access ('getters'), and modify ('setters') these properties are included. The toString() method is overridden to give a readable string representation of the dog object.

Dog Class Implementation

public class Dog {
private String name;
private String color;
private double weight; // in pounds
// Default constructor
public Dog() {
this.name = "Fido";
this.color = "brown";
this.weight = 10.0;
}
// Constructor with only name
public Dog(String name) {
this.name = name;
this.color = "brown";
this.weight = 10.0;
}
// Constructor with all parameters
public Dog(String name, String color, double weight) {
this.name = name;
this.color = color;
this.weight = weight;
}
// Behavioral method: sit
public String sit() {
return "arrrff";
}
// Getters
public String getName() {
return name;
}
public String getColor() {
return color;
}
public double getWeight() {
return weight;
}
// Setters
public void setName(String name) {
this.name = name;
}
public void setColor(String color) {
this.color = color;
}
public void setWeight(double weight) {
this.weight = weight;
}
// toString method
@Override
public String toString() {
return "Dog [Name=" + name + ", Color=" + color + ", Weight=" + weight + " lbs]";
}
}

Poodle Subclass Design and Implementation

The Poodle class extends Dog, adding an attribute for breed. It uses super() to invoke the parent constructors and overrides toString() to include the breed information.

public class Poodle extends Dog {
private String breed;
// Constructor with breed, name, color, weight
public Poodle(String breed, String name, String color, double weight) {
super(name, color, weight);
this.breed = breed;
}
// Constructor with breed only; other attributes default
public Poodle(String breed) {
super();
this.breed = breed;
}
// Getter for breed
public String getBreed() {
return breed;
}
// Setter for breed
public void setBreed(String breed) {
this.breed = breed;
}
// Override toString
@Override
public String toString() {
return super.toString() + " , Breed=" + breed;
}
}

DogRunner Class (Tester)

The DogRunner class creates instances of Dog and Poodle, demonstrates their behaviors and properties, and outputs their details.

public class DogRunner {
public static void main(String[] args) {
// Create default dog
Dog defaultDog = new Dog();
System.out.println(defaultDog);
System.out.println("Sit: " + defaultDog.sit());
// Create dog with only name
Dog namedDog = new Dog("Buddy");
System.out.println(namedDog);
System.out.println("Sit: " + namedDog.sit());
// Create dog with all parameters
Dog customDog = new Dog("Rex", "black", 20);
System.out.println(customDog);
System.out.println("Sit: " + customDog.sit());
// Modify properties using setters
customDog.setName("Max");
customDog.setColor("white");
customDog.setWeight(25);
System.out.println("Updated Dog: " + customDog);
// Create Poodle
Poodle poodle = new Poodle("Standard", "Lulu", "white", 15);
System.out.println(poodle);
System.out.println("Sit: " + poodle.sit());
// Change breed
poodle.setBreed("Miniature");
System.out.println("Updated Poodle: " + poodle);
}
}

Conclusion

This implementation effectively encapsulates the properties and behaviors of dogs, demonstrates inheritance with the Poodle subclass, and provides a comprehensive runner class to validate functionality. Adhering to object-oriented principles like encapsulation, inheritance, and overriding enhances code clarity and reusability, fulfilling all specified requirements.

References

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