16. Example of calling a constructor

• 
  public class Product {
      // the instance variables
      private String code;
      private String description;
      private double price;
  
      // constructors
      public Product()
      {
          this( "unknown", "unknown", 0.0 );
      }
  
      public Product(String code, String description, double price)
      {
          this.code = code;
          this.description = description;
          this.price = price;
      }
  }