This is a program to create an Invoice Calculator application; the user inputs the subtotal and the application will calculate the invoice and, display the discount percent and discount amount.
- if the subtotal is more than or equal to 200, the discount percent is 20%
- if the subtotal is less than 200 and more than or equal to 100, discount percent is 10%
- if the subtotal less than 100, discount percent is 0%
The problem is I don't know how to get user input (subtotal) to be used in another class (a class called Calculate, at the bottom), it keeps saying 'Javadoc not found' but Javadoc is fine there is nothing wrong, and I think there may be something wrong with my coding.
- if the subtotal is more than or equal to 200, the discount percent is 20%
- if the subtotal is less than 200 and more than or equal to 100, discount percent is 10%
- if the subtotal less than 100, discount percent is 0%
The problem is I don't know how to get user input (subtotal) to be used in another class (a class called Calculate, at the bottom), it keeps saying 'Javadoc not found' but Javadoc is fine there is nothing wrong, and I think there may be something wrong with my coding.
Code:
package pad;
import java.util.*;
import javax.swing.*;
import java.awt.event.*;
import java.awt.GridLayout;
public class Pad extends JFrame{
JFrame jf;//frame to place the panels
JPanel jp;//panel to place the components
JLabel lblSubTotal, lblDiscountPercent, lblDiscount, lblInvoice;//label to display
JTextField txtSubTotal,txtDiscountPercent, txtDiscount, txtInvoice;
JButton btnCalc, btnExit;//button
public Pad(){
//initialise panel
jp= new JPanel(new GridLayout(0,2));//set rows and columns for grid layout
//initialise the label
lblSubTotal = new JLabel ("Subtotal:");
lblDiscount = new JLabel ("Discount:");
lblInvoice = new JLabel ("Invoice:");
jp.add(lblSubTotal);
txtSubTotal =new JTextField("Enter your subtotal");//initial text box
jp.add (txtSubTotal);
jp.add (lblDiscountPercent);//add label
txtDiscountPercent = new JTextField ();
jp.add(lblDiscount);
txtDiscount = new JTextField();
jp.add(lblInvoice);
txtInvoice = new JTextField();
//initialise button
btnCalc = new JButton ("Calculate");
btnCalc.addActionListener(new ActionHandler());
btnExit = new JButton ("Exit");
btnExit.addActionListener(new ActionHandler());//add action listener
//create button's panel
JPanel btn_panel = new JPanel();
btn_panel.add(btnCalc);
btn_panel.add(btnExit);
btn_panel.add(btnExit);
jp.add(btn_panel);
//Frame setting
jf=new JFrame();
jf.setTitle("Invoice Total Calculator");
//jf.setSize(800, 500);// set the size of the frame
jf.add(jp);//add panel to frame
jf.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
jf.setLocationRelativeTo(null);//the window is placed in the center of the screen
jf.pack();//Causes this Window to be sized to fit the preferred size and layouts of its subcomponents.
jf.setVisible(true); //always set at last line
}
public static void main(String[] args){
new Pad();
}
class ActionHandler implements ActionListener {
public void actionPerformed(ActionEvent e){
e.getActionCommand().equals("Exit");
System.exit(0);
}
}
class Calculate{
double discount, discountPercent, Invoice;
Pad pad = new Pad();
if (pad.txtSubTotal >= 200)
discountPercent = 0.2;
else
if (pad.txtSubTotal < 200 && >= 100)
discountPercent = 0.1;
else
if (pad.txtSubTotal < 100)
discountPercent = 0;
}
}
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