Question

Hello,

I’m having some trouble making changes to the Cellphone and the associated tester class;

Any help is appreciated !

1. Cellphone class;

-Implement both get and set methods for all 3 attributes or fields of the class

- Fields/Attributes are all initialized using the setter methods and there’s no need to initialize them using the contractor.

2) Tester Class;

-Create the objects using the default constructor. This is the constructor with no parameter

-Call the set methods of all 3 fields/attributes to set their initial values.

-No changes to the other functionalities of the tester class.

IDE; drjava

CellPhone.java

-------------------------------------------------------------------------------

/*
* This is CellPhone class with variables
* Manufacturer Name, Retail Price and Model name.
* It has its getter and setter methods along with the
* methods to calculate the increment and decrement of price.
*/
public class CellPhone {
   private String manufact_name;
   private double retail_price;
   private String model;
   public CellPhone(String name, double price, String model) {
       this.manufact_name = name;
       this.retail_price = price;
       this.model = model;  
   }

   /**
   * @return the manufact_name
   */
   public String getManufact_name() {
       return manufact_name;
   }
  
   /**
   * @return the retail_price
   */
   public double getRetail_price() {
       return retail_price;
   }
   /**
   * @param retail_price the retail_price to set
   */
   public void setRetail_price(double retail_price) {
       this.retail_price = retail_price;
   }
   /**
   * @return the model
   */
   public String getModel() {
       return model;
   }
   /**
   * @param model the model to set
   */
   public void setModel(String model) {
       this.model = model;
   }
  
   public double increase_price(double inc) {
       retail_price = retail_price + inc;
       return retail_price;  
   }
  
   public double decrease_price(double dec) {
       retail_price = retail_price - dec;
       return retail_price;
   }

}

CPTester.java

-------------------------------------------------------------------------------

/*
* This class tests the CellPhone.java class. It creates two objects for CellPhone class
* Gets the input from User through Scanner class. Increase/Decrease the price of CellPhone
* and display the CellPhone object information.
*/
import java.util.Scanner;

public class CPTester {
  
   public static void main(String[]args) {
       Scanner in = new Scanner(System.in);             

       System.out.print("Please enter the CellPhone1 Manufacturer Name:");
       String manufact_name1 = in.next();
       System.out.print("Please enter the CellPhone1 Retail Price :");
       double price1 = in.nextDouble();
       System.out.print("Please enter the CellPhone1 Model Name :");
       String model1 = in.next();
      
       CellPhone cp1 = new CellPhone(manufact_name1,price1, model1);
       System.out.println("CellPhone1 Manufacturer Name :"+cp1.getManufact_name());
       System.out.println("CellPhone1 Retail price :"+cp1.getRetail_price());
       System.out.println("CellPhone1 Model :"+cp1.getModel());
       //Increased price
       System.out.print("Please enter the CellPhone1 price increment :");
       double inc=in.nextDouble();
       //Price after increase
       System.out.println("CellPhone1 Retail price After increase :"+cp1.increase_price(inc));
      
      
       System.out.print("Please enter the CellPhone2 Manufacturer Name:");
       String manufact_name2 = in.next();
       System.out.print("Please enter the CellPhone2 Retail Price :");
       double price2 = in.nextDouble();
       System.out.print("Please enter the CellPhone2 Model Name :");
       String model2 = in.next();
       CellPhone cp2 = new CellPhone(manufact_name2,price2, model2);
       System.out.println("CellPhone2 Manufacturer Name :"+cp2.getManufact_name());
       System.out.println("CellPhone2 Retail price :"+cp2.getRetail_price());
       System.out.println("CellPhone2 Model :"+cp2.getModel());
       //Decreased price
       System.out.print("Please enter the CellPhone2 price Decrease :");
       double dec=in.nextDouble();
       //Price after decrease
       System.out.println("CellPhone2 Retail price After decrease :"+cp2.decrease_price(dec));      
              
   }

}

Answer 1

Hey! here my answer is given below...to appreciate my work please give a positive rating......

CellPhone.java setManufact_name() set function is added .......

/*
* This is CellPhone class with variables
* Manufacturer Name, Retail Price and Model name.
* It has its getter and setter methods along with the
* methods to calculate the increment and decrement of price.
*/
public class CellPhone {
    private String manufact_name;
    private double retail_price;
    private String model;
    
    /**
    * @return the manufact_name
    */
    public String getManufact_name() {
        return manufact_name;
    }

    /**
    * @param manufact_name the manufact_name to set
    */
    public void setManufact_name(String manufact_name) {
        this.manufact_name = manufact_name;
    }

   
    /**
    * @return the retail_price
    */
    public double getRetail_price() {
        return retail_price;
    }
    /**
    * @param retail_price the retail_price to set
    */
    public void setRetail_price(double retail_price) {
        this.retail_price = retail_price;
    }
    /**
    * @return the model
    */
    public String getModel() {
        return model;
    }
    /**
    * @param model the model to set
    */
    public void setModel(String model) {
        this.model = model;
    }

   
   
    public double increase_price(double inc) {
        retail_price = retail_price + inc;
        return retail_price;  
    }
   
    public double decrease_price(double dec) {
        retail_price = retail_price - dec;
        return retail_price;
    }
 
 }

CPTester.java , updated code with explanation.....

/*
* This class tests the CellPhone.java class. It creates two objects for CellPhone class
* Gets the input from User through Scanner class. Increase/Decrease the price of CellPhone
* and display the CellPhone object information.
*/
import java.util.Scanner;

public class CPTester {
  
   public static void main(String[]args) {
       Scanner in = new Scanner(System.in);             
        
       /* take input from user for object cp1*/
       System.out.print("Please enter the CellPhone1 Manufacturer Name:");
       String manufact_name1 = in.next();
       System.out.print("Please enter the CellPhone1 Retail Price :");
       double price1 = in.nextDouble();
       System.out.print("Please enter the CellPhone1 Model Name :");
       String model1 = in.next();
      
       /*create cp1 object of CellPhone class
       call setter method of 3 variables to set the value of user*/
       CellPhone cp1 = new CellPhone();
       cp1.setManufact_name(manufact_name1);
       cp1.setRetail_price(price1);
       cp1.setModel(model1);

        /* call getter method of 3 variables to extract the stored data of cp1 */
       System.out.println("CellPhone1 Manufacturer Name :"+cp1.getManufact_name());
       System.out.println("CellPhone1 Retail price :"+cp1.getRetail_price());
       System.out.println("CellPhone1 Model :"+cp1.getModel());

       //Increased price
       System.out.print("Please enter the CellPhone1 price increment :");
       double inc=in.nextDouble();
       //Price after increase
       System.out.println("CellPhone1 Retail price After increase :"+cp1.increase_price(inc));
      
      /* take input from user for object cp2*/
       System.out.print("Please enter the CellPhone2 Manufacturer Name:");
       String manufact_name2 = in.next();
       System.out.print("Please enter the CellPhone2 Retail Price :");
       double price2 = in.nextDouble();
       System.out.print("Please enter the CellPhone2 Model Name :");
       String model2 = in.next();

       
        /*create cp2 object of CellPhone class
        call setter method of 3 variables to set the value of user*/
       CellPhone cp2 = new CellPhone();
       cp2.setManufact_name(manufact_name2);
       cp2.setModel(model2);
       cp2.setRetail_price(price2);

        /* call getter method of 3 variables to extract the stored data of cp1 */
       System.out.println("CellPhone2 Manufacturer Name :"+cp2.getManufact_name());
       System.out.println("CellPhone2 Retail price :"+cp2.getRetail_price());
       System.out.println("CellPhone2 Model :"+cp2.getModel());
       //Decreased price
       System.out.print("Please enter the CellPhone2 price Decrease :");
       double dec=in.nextDouble();
       //Price after decrease
       System.out.println("CellPhone2 Retail price After decrease :"+cp2.decrease_price(dec));      
              
   }

}

this updated code works fine and fulfills all the requirements...........

thanks for any query please comment in the comment section.......