Question

Please show fully functioning Java code and screenshots of outputs. Please separate by 1a and 1b.

#1. Design a Java JProduct class for a product which implements both cloneable and comparable interfaces

The class should have the following private member variables:

• m_id: an integer that holds the product ID
• m_name: a string that holds the product name
• m_wholesaleprice: a double that holds the wholesale price
• m_retailers: a String array that holds all retailers who sell the product

and the class should have the following public member functions:

• default constructor: initializes the product to some default one
• constructor #2: accepts id, name, wholesaleprice and retailers as arguments.   The method should set these values to the appropriate instance variables
• setPrice: accepts wholesaleprice as argument.   The method should set the argument to the appropriate instance variable
• setRetailers: accepts all retailers from an array as argument. The method should copy the retailers to the respective instance variable.
• Four respective get functions to retrieve the four instance variables' values.
• Overrided compareTo()method: use wholesale price for comparison
• Overrided clone() method which must conduct deep copy.

Please write your complete JProduct class and its testing class below

1a (35 pts) Write your complete Java code for the above Java JProduct class in JProduct.java file.

1b (35 pts) In a new file named testProduct.java, write your test Java class and its main method which will do the following:

•   create two JProduct objects(productOne, productTwo), productOne with default constructor and productTwo with the explicit constructor;
•   then compare the two products and output the cheaper one’s id, name, wholesale price (test of comparable interface) and all its retailers;
•   next create a third JProduct object productThree which is a clone of the cheaper one between productOne and productTwo, and then reset its price to a new price and reset its retailers to a new set of retailers and output its ID, name wholesale price, and all of its retailers

Answer 1

JProduct.java Code:-

//JProduct.java
public class JProduct implements Cloneable,Comparable<JProduct>{
private int m_id;
private String productName;
private double price;

public JProduct()
{
m_id=000;
productName="Defalut";
price=0.0;
}

public JProduct(int m_id, String productName, double wholesalePrice) {
this.m_id = m_id;
this.productName = productName;
this.price = wholesalePrice;
}

public void setPrice(double price) {
this.price = price;
}

public int getM_id() {
return m_id;
}

public String getProductName() {
return productName;
}

public double getPrice() {
return price;
}

@Override
public int compareTo(JProduct o)
{
if(this.getPrice()>o.getPrice()) return 1;
if(this.getPrice()<o.getPrice()) return -1;
else return 0;
}

@Override
protected JProduct clone() throws CloneNotSupportedException {
return (JProduct) super.clone(); //To change body of generated methods, choose Tools | Templates.
}
}

JProduct.java Code Screenshot:-

testProduct.java Code:-

//testProduct.java
public class testProduct {
public static void main(String[] args) throws CloneNotSupportedException {
JProduct productOne=new JProduct();
JProduct productTwo=new JProduct(101, "Mobile", 125.5);
JProduct productThree;
if(productOne.compareTo(productTwo)<0)
{
System.out.println("Cheaper product is :");
System.out.println("Id : "+productOne.getM_id());
System.out.println("Name: "+productOne.getProductName());
System.out.println("Wholesale price: "+productOne.getPrice());
productThree= productOne.clone();
}
else
{
System.out.println("Cheaper product is :");
System.out.println("Id : "+productTwo.getM_id());
System.out.println("Name: "+productTwo.getProductName());
System.out.println("Wholesale price: "+productTwo.getPrice());
productThree=productOne.clone();
}
productThree.setPrice(200);
  
System.out.println("\n\nId : "+productThree.getM_id());
System.out.println("Name: "+productThree.getProductName());
System.out.println("Wholesale price: "+productThree.getPrice());
}
}

testProduct.java Code Screenshot:-

Output Screenshot:-