Question

Hi , i have facing problems in both 5 error while i am soloving it can you help me with good solotion for both pleas pleas ???

a- Write a java class to define the new data type Item. The data type Item is defined by the attributed name of type String) and price of type double). Provide the following methods in the class implementation: • Default constructor (that initializes the attribute name to the value “Unknown”, and the attribute price to the value 1) • Overloaded constructor(all arguments constructor) Setters methods Getters methods b- Write a java application (driver program) to implement the following: 1. Instantiate an object called iteml to be a default object. 2. Instantiate an object called item2 storing the name “Ab12" and price = 250. 3. Instantiate an object called item3 that holds data that the user input using a Scanner object 4. Instantiate an object called item4 that holds data that the user input using JOptionPane input dialog. 5. Instantiate an object called item5 storing the name "BC456" and the double price of item3. 6. Increase the price of iteml by 10%. 7. Output the data about all items, and their total price on a JOptionPane output dialog.

Answer 1

/* I used Item as class name also see screenshot for indentation*/

/* Item.java */
public class Item {
// Instance variable
private String name;
private double price;
// default constructor
public Item(){
name = "Unknown";
price = 1;
}
// overload constructor

public Item(String name, double price) {
this.name = name;
this.price = price;
}
// Getter and setters

public String getName() {
return name;
}

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

public double getPrice() {
return price;
}

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

public class Item { private String name; private double price; public Item() { name = "Unknown"; price = 1; } public Item (String name, double price) { this.name = name; this.price = price; } public String getName() { return name; } public void setName (String name) { this.name = name; } public double getPrice () { return price; } public void setPrice (double price) { this.price = price; } }

/* ItemDriver.java */ // Main function class

import java.util.Scanner;
import javax.swing.JOptionPane;

public class ItemDriver {

public static void main(String[] args) {
Item item1 = new Item(); // using default object
Item item2 = new Item("Ab12",250); // using given name and price
Scanner sc = new Scanner(System.in); // for user input
System.out.print("Enter name of item: ");
String item = sc.nextLine(); // take item name input
System.out.print("Enter Price of item: ");
double price = sc.nextDouble(); // take price input
Item item3 = new Item(item,price); // using scanner
item = JOptionPane.showInputDialog("Enter name of item: "); // take item name input
price = Double.parseDouble(JOptionPane.showInputDialog("Enter name of price: "));
Item item4 = new Item(item,price);// using JOption pane
Item item5 = new Item("BC456",2*item3.getPrice()); // SET double price of item3 in item5
item1.setPrice((item1.getPrice()+item1.getPrice()*0.1)); // INCREASE PRICE BY 10%
double totalprice = item1.getPrice() + item2.getPrice() + item3.getPrice()
+ item4.getPrice() + item5.getPrice(); // find total price
String info = "Item1 Name: "+item1.getName() +" Price: "+item1.getPrice()+"\n"
+ "Item2 Name: "+item2.getName() +" Price: "+item2.getPrice()+"\n"
+ "Item3 Name: "+item3.getName() +" Price: "+item3.getPrice()+"\n"
+ "Item4 Name: "+item4.getName() +" Price: "+item4.getPrice()+"\n"
+ "Item5 Name: "+item4.getName() +" Price: "+item5.getPrice()+"\n"
+ "Total Price: "+ totalprice;
JOptionPane.showMessageDialog(null,info);
}
}

import java.util.Scanner; import javax.swing.JOptionPane; public class ItemDriver { public static void main(String[] args) { Item iteml = new Item(); // using default object Item item2 = new Item("Ab12", 250); // using given name and price Scanner sc = new Scanner (System.in); // for user input System.out.print("Enter name of item: "); String item = sc.nextLine(); // take item name input System.out.print("Enter Price of item: "); double price = sc.nextDouble(); // take price input Item item3 = new Item(item, price); // using scanner item = JOptionPane.showInputDialog("Enter name of item: "); // take item name input price = Double.parseDouble (JOptionPane. showInputDialog("Enter name of price: ")); Item item4 = new Item(item, price);// using Joption pane Item item5 = new Item("BC456",2*item3.getPrice () ); // double price of item3 in item5 iteml.setPrice ((iteml.getPrice () +iteml.getPrice () *0.1)); double totalprice = iteml.getPrice () + item2.getPrice () + item3.getPrice () + items.getPrice () + item5.getPrice (); // find total price String info = "Iteml Name: "+iteml.getName()+" Price: "+iteml.getPrice ()+"\n" + "Item2 Name: "+item2.getName()+" Price: "+item2.getPrice ()+"\n" + "Item3 Name: "+item3.getName()+" Price: "+item3.getPrice ()+"\n" + "Item4 Name: "+item4.getName()+" Price: "+items.getPrice ()+"\n" + "Items Name: "+item4.getName()+" Price: "+item5.getPrice ()+"\n" + "Total Price: "+ totalprice; JOptionPane. showMessageDialog(null, info); }

/* OUTPUT */

run: Enter name of item: BK44 Enter Price of item: 200 Input x ? Enter name of item: LM78 OK Cancel

run: Enter name of item: BK44 Enter Price of item: 200 Х Input ? Enter name of price: 450 OK Cancel

Message Х i Item Name: Unknown Price: 1.1 Item2 Name: Ab12 Price: 250.0 Item3 Name: BK44 Price: 200.0 Item Name: LM78 Price: 450.0 Item Name: LM78 Price: 400.0 Total Price: 1301.1 OK