1. Retail Price Calculator : Create a GUI calculator where the user enters a who

Question

1. Retail Price Calculator :

Create a GUI calculator where the user enters a wholesale cost of an item and its markup percentage into textfields. When a button is pressed, display the item's retail price. For example if the item's wholesale cost is $5 and its markup percentage is 100 percent then its retail price is $10.00

2. Display the retail price with a$ and 2 digits after the decimal

3. Display "Invalid data" and change the color of the textfield when invalid data is entered in the textfields.

Explanation / Answer

Solution:

cdoe:

import javax.swing.JFrame;

import java.awt.FlowLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

import javax.swing.*;

public class CalculatorPanel extends JFrame implements ActionListener{
   JLabel l1,l2,l3,l4,l5;
   JTextField f1,f2;
   JButton b;
   CalculatorPanel()
   {
       l1=new JLabel("Wholesale Cost");
       l2=new JLabel("MarkUp Percentage");
       l3=new JLabel("Wholesale Cost");
       l4=new JLabel("MarkUp Percentage");
       l5=new JLabel("Retail Price is");
      
       f1=new JTextField(25);
       f2=new JTextField(25);
       b=new JButton("Calculate");
      
       add(l1);
       add(f1);
       add(l3);
       add(l2);
       add(f2);
       add(l4);
       add(b);
       add(l5);
       b.addActionListener(this);
       setLayout(new FlowLayout());
       setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
   }

   public static void main(String[] args) {
       // TODO Auto-generated method stub
       CalculatorPanel cp=new CalculatorPanel();
       cp.setSize(650, 300);
       cp.setVisible(true);

   }

   @Override
   public void actionPerformed(ActionEvent e) {
       // TODO Auto-generated method stub
       String s1=f1.getText();
       String s2=f2.getText();
       l3.setText("Wholesale Cost "+s1);
       l4.setText("MarkUp Percentage "+s2);
       int a=Integer.valueOf(s1);
       int b=Integer.valueOf(s2);
       int c=a+a*b/100;
       l5.setText("Retail Price is "+c);
      
      
   }

}

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