The class is pretty straightforward: it is public, and it contains three private members, three public constructors with different sets of parameters, three public accessors, and three public mutators. The file for this class should be named Product.java (the same name as the class name).

One more public member that one can add is the method that multiplies price by quantity to get the cost of the product.

eNotes Homework Help policy does not permit Educators to complete assignments for students, so I leave to you the file with main() function.

The contents of the file Product.java are as follows:

public class Product
{
// private member variables
private String name ;
private double price ;
private int quantity ;

// constructors
public Product ( ) // default constructor
{
name = "New Product" ;
price = 1.0 ;
quantity = 1 ;
}

// constructor that takes name only
public Product ( String name )
{
this.name = name ;
price = 1.0 ;
quantity = 1 ;
}

// constructor that takes data for all three members
public Product ( String name , double price , int quantity )
{
this.name = name ;
this.price = price ;
this.quantity = quantity ;
}

// accessors / mutators
public String getName ( )
{
return name ;
}

public double getPrice ( )
{
return price ;
}

public int getQuantity ( )
{
return quantity ;
}

public void setName ( String name )
{
this.name = name ;
}

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

public void setQuantity( int quantity )
{
this.quantity = quantity ;
}
}