Question

Update your Assignment 4 as follows (Assignment 4 codes will be on the bottom)

Create a new method called displayAll, that takes an ArrayList (of your base class) as a parameter, and doesn't return anything [25 pts]

The displayAll method will loop through the ArrayList, and call the display (or toString) method on each object   [25 pts]

In the main method, create an ArrayList containing objects of both your base class and subclass. (You should have at least 4 objects)  [25 pts]

In the main method, make a call to the displayAll method, passing your ArrayList of objects [25 pts]

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Shoes.java

public class Shoes {
// Declaring instance variables
private int size;
private String brand;
private double price;

// Zero argumented constructor
public Shoes() {
this.size = 7;
this.brand = "Red Tape";
this.price = 50;
}

// Parameterized constructor
public Shoes(int size, String brand, double price) {
super();
this.size = size;
this.brand = brand;
this.price = price;
}

// getters and setters
/*
* This method will get the price of instance variable
*
* @params void
*
* @return double
*/
public int getSize() {
return size;
}

/*
* This method will set the size of instance variable
*
* @params int
*
* @return void
*/
public void setSize(int size) {
this.size = size;
}

/*
* This method will get the brand name of instance variable
*
* @params void
*
* @return String
*/
public String getBrand() {
return brand;
}

/*
* This method will set the brand of instance variable
*
* @params String
*
* @return void
*/
public void setBrand(String brand) {
this.brand = brand;
}

/*
* This method will return the price of instance variable
*
* @params void
*
* @return double
*/
public double getPrice() {
return price;
}

/*
* This method will set the price of instance variable
*
* @params double
*
* @return void
*/
public void setPrice(double price) {
this.price = price;
}

/*
* This method will display the values of instance variables
*
* @params void
*
* @return void
*/
void display() {
System.out.println("Size :" + size);
System.out.println("Brand :" + brand);
System.out.println("Price :$" + price);
}
}

__________________

SportsShoes.java

public class SportsShoes extends Shoes {
/*
* Declaring instance variables
*/
private String shoesType;

/*
* Zero argumented constructor
*/
public SportsShoes() {
super(6, "Adidas", 50);
this.shoesType = "Basket Ball";
}
/*
* Parameterized constructor
*/
public SportsShoes(String shoesType, int size, String brand, double price) {
super(size, brand, price);
this.shoesType = shoesType;
}

// getters and setters
/*
* This method will get the shoes type of instance variable
*
* @params void
*
* @return String
*/
public String getShoesType() {
return shoesType;
}

/*
* This method will set the shoes type of instance variable
*
* @params String
*
* @return void
*/
public void setShoesType(String shoesType) {
this.shoesType = shoesType;
}

/*
* Overriding the super class Display method
* This method will display the values of instance variables
*
* @params void
*
* @return void
*/
@Override
public void display() {
super.display();
System.out.println("Shoe Type :" + shoesType);
}

}

____________________

Demo.java

public class Demo {

public static void main(String[] args) {

//Creating an instance of Sub class of type SportsShoes

SportsShoes sh1=new SportsShoes();

//calling the setter method on it by passing the value

sh1.setShoesType("Tenies Shoes");

System.out.println("**** Displaying the Shoes Info ****");

//Displaying the shoes info

sh1.display();

//Creating an Instance of Sports Shoes class by passing the values as arguments

SportsShoes sh2=new SportsShoes("Joggers Shoes",9, "Nike", 72);

System.out.println("**** Displaying the Shoes Info ****");

//Displaying the shoes info

sh2.display();

}

}

___________________

Output:

**** Displaying the Shoes Info ****
Size :6
Brand :Adidas
Price :$50.0
Shoe Type :Tenies Shoes
**** Displaying the Shoes Info ****
Size :9
Brand :Nike
Price :$72.0
Shoe Type :Joggers Shoes

Answer 1

DisplayAll Method which is mentioned in the shoes class

void displayAll(ArrayList<Shoes> sh){

System.out.println("Displaying All methods");

for(Shoes a:sh){

a.display();

}

}

//Shoes.java

import java.util.ArrayList;

public class Shoes {

// Declaring instance variables

private int size;

private String brand;

private double price;

// Zero argumented constructor

public Shoes() {

this.size = 7;

this.brand = "Red Tape";

this.price = 50;

}

// Parameterized constructor

public Shoes(int size, String brand, double price) {

super();

this.size = size;

this.brand = brand;

this.price = price;

}

// getters and setters

/*

* This method will get the price of instance variable

*

* @params void

*

* @return double

*/

public int getSize() {

return size;

}

/*

* This method will set the size of instance variable

*

* @params int

*

* @return void

*/

public void setSize(int size) {

this.size = size;

}

/*

* This method will get the brand name of instance variable

*

* @params void

*

* @return String

*/

public String getBrand() {

return brand;

}

/*

* This method will set the brand of instance variable

*

* @params String

*

* @return void

*/

public void setBrand(String brand) {

this.brand = brand;

}

/*

* This method will return the price of instance variable

*

* @params void

*

* @return double

*/

public double getPrice() {

return price;

}

/*

* This method will set the price of instance variable

*

* @params double

*

* @return void

*/

public void setPrice(double price) {

this.price = price;

}

/*

* This method will display the values of instance variables

*

* @params void

*

* @return void

*/

void display() {

System.out.println("Size :" + size);

System.out.println("Brand :" + brand);

System.out.println("Price :$" + price);

}

//method that displays all the shoes details

void displayAll(ArrayList<Shoes> sh){

System.out.println("Displaying All methods");

for(Shoes a:sh){

a.display();

}

}

}

Demo class to check that

//Demo.java

import java.util.ArrayList;

public class Demo {

public static void main(String[] args) {

Shoes shoe = new Shoes();

ArrayList<Shoes> sh = new ArrayList<Shoes>();

Shoes sh1=new Shoes(1,"Brand1", 100.0);

Shoes sh2=new Shoes(2,"Brand2", 200.0);

Shoes sh3=new Shoes(2,"Brand3", 300.0);

sh.add(sh1);

sh.add(sh2);

sh.add(sh3);

shoe.displayAll(sh);

}

}

Output: