Hi there i am a java begineer programmer i recently started developing programes on NetBeans using the GUI as it is more reliable and efficent - the current program that i am working on is a GUI interface for a Till Slip called TillSslipUI. I have meet the recquirements for the variable names and the necessary code that is needed to be inputed as the rest is generated but the problem that i have found out that the program recquires a main() method in order to be runned - here is the following code:
import java.util.*;
import java.text.*;
public class TillSlipUI extends javax.swing.JPanel {
double num1; double num2; double num3; double totalItems; double vat; double finTotal; double amt; double change;
DecimalFormat d = new DecimalFormat ("0.00");
/**
* Creates new form TillSlipUI
*/
public TillSlipUI() {
initComponents();
}
/**
* This method is called from within the constructor to initialize the form.
* WARNING: Do NOT modify this code. The content of this method is always
* regenerated by the Form Editor.
*/
@SuppressWarnings("unchecked")
// <editor-fold defaultstate="collapsed" desc="Generated Code">
private void initComponents() {
jPanel1 = new javax.swing.JPanel();
jLabel1 = new javax.swing.JLabel();
jLabel2 = new javax.swing.JLabel();
jLabel3 = new javax.swing.JLabel();
totalButton = new javax.swing.JButton();
vatButton = new javax.swing.JButton();
finalTotButton = new javax.swing.JButton();
jLabel4 = new javax.swing.JLabel();
changeButton = new javax.swing.JButton();
item1TxtFld = new javax.swing.JTextField();
item2TxtFld = new javax.swing.JTextField();
item3TxtFld = new javax.swing.JTextField();
totalTxtFld = new javax.swing.JTextField();
vatTxtFld = new javax.swing.JTextField();
finalTotalTxtFld = new javax.swing.JTextField();
amountTxtFld = new javax.swing.JTextField();
changeTxtFld = new javax.swing.JTextField();
jPanel1.setBackground(new java.awt.Color(153, 255, 255));
jPanel1.setBorder(javax.swing.BorderFactory.createTitledBorder(null, "Till Slip", javax.swing.border.TitledBorder.DEFAULT_JUSTIFICATION, javax.swing.border.TitledBorder.DEFAULT_POSITION, new java.awt.Font("Brush Script MT", 1, 36), new java.awt.Color(0, 204, 0))); // NOI18N
jLabel1.setText("Price of Item1");
jLabel2.setText("Price of Item2");
jLabel3.setText("Price of Item3");
totalButton.setText("Total");
totalButton.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
totalButtonActionPerformed(evt);
}
});
vatButton.setText("VAT");
vatButton.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
vatButtonActionPerformed(evt);
}
});
finalTotButton.setText("Final Total");
finalTotButton.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
finalTotButtonActionPerformed(evt);
}
});
jLabel4.setText("Amount Tendered");
changeButton.setText("Change");
changeButton.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
changeButtonActionPerformed(evt);
}
});
javax.swing.GroupLayout jPanel1Layout = new javax.swing.GroupLayout(jPanel1);
jPanel1.setLayout(jPanel1Layout);
jPanel1Layout.setHorizontalGroup(
jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(jPanel1Layout.createSequentialGroup()
.addContainerGap()
.addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(jPanel1Layout.createSequentialGroup()
.addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.TRAILING, false)
.addComponent(vatButton, javax.swing.GroupLayout.Alignment.LEADING, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
.addComponent(totalButton, javax.swing.GroupLayout.Alignment.LEADING, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
.addComponent(finalTotButton, javax.swing.GroupLayout.Alignment.LEADING, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
.addGap(0, 0, Short.MAX_VALUE))
.addComponent(changeButton, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
.addComponent(jLabel4, javax.swing.GroupLayout.DEFAULT_SIZE, 88, Short.MAX_VALUE)
.addGroup(jPanel1Layout.createSequentialGroup()
.addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addComponent(jLabel3, javax.swing.GroupLayout.PREFERRED_SIZE, 80, javax.swing.GroupLayout.PREFERRED_SIZE)
.addComponent(jLabel2, javax.swing.GroupLayout.PREFERRED_SIZE, 80, javax.swing.GroupLayout.PREFERRED_SIZE)
.addComponent(jLabel1, javax.swing.GroupLayout.PREFERRED_SIZE, 80, javax.swing.GroupLayout.PREFERRED_SIZE))
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)))
.addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(javax.swing.GroupLayout.Alignment.TRAILING, jPanel1Layout.createSequentialGroup()
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
.addComponent(item1TxtFld, javax.swing.GroupLayout.PREFERRED_SIZE, 200, javax.swing.GroupLayout.PREFERRED_SIZE))
.addGroup(jPanel1Layout.createSequentialGroup()
.addGap(31, 31, 31)
.addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addComponent(finalTotalTxtFld, javax.swing.GroupLayout.PREFERRED_SIZE, 200, javax.swing.GroupLayout.PREFERRED_SIZE)
.addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING, false)
.addComponent(amountTxtFld)
.addComponent(changeTxtFld, javax.swing.GroupLayout.DEFAULT_SIZE, 200, Short.MAX_VALUE))
.addComponent(vatTxtFld, javax.swing.GroupLayout.PREFERRED_SIZE, 200, javax.swing.GroupLayout.PREFERRED_SIZE)
.addComponent(totalTxtFld, javax.swing.GroupLayout.PREFERRED_SIZE, 200, javax.swing.GroupLayout.PREFERRED_SIZE)
.addComponent(item3TxtFld, javax.swing.GroupLayout.PREFERRED_SIZE, 200, javax.swing.GroupLayout.PREFERRED_SIZE)
.addComponent(item2TxtFld, javax.swing.GroupLayout.PREFERRED_SIZE, 200, javax.swing.GroupLayout.PREFERRED_SIZE))))
.addGap(425, 425, 425))
);
jPanel1Layout.setVerticalGroup(
jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(jPanel1Layout.createSequentialGroup()
.addGap(20, 20, 20)
.addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
.addComponent(jLabel1, javax.swing.GroupLayout.PREFERRED_SIZE, 22, javax.swing.GroupLayout.PREFERRED_SIZE)
.addComponent(item1TxtFld, javax.swing.GroupLayout.PREFERRED_SIZE, 22, javax.swing.GroupLayout.PREFERRED_SIZE))
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED, 35, Short.MAX_VALUE)
.addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
.addComponent(jLabel2, javax.swing.GroupLayout.PREFERRED_SIZE, 22, javax.swing.GroupLayout.PREFERRED_SIZE)
.addComponent(item2TxtFld, javax.swing.GroupLayout.PREFERRED_SIZE, 22, javax.swing.GroupLayout.PREFERRED_SIZE))
.addGap(30, 30, 30)
.addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
.addComponent(jLabel3, javax.swing.GroupLayout.PREFERRED_SIZE, 22, javax.swing.GroupLayout.PREFERRED_SIZE)
.addComponent(item3TxtFld, javax.swing.GroupLayout.PREFERRED_SIZE, 22, javax.swing.GroupLayout.PREFERRED_SIZE))
.addGap(45, 45, 45)
.addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
.addComponent(totalButton)
.addComponent(totalTxtFld, javax.swing.GroupLayout.PREFERRED_SIZE, 23, javax.swing.GroupLayout.PREFERRED_SIZE))
.addGap(33, 33, 33)
.addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
.addComponent(vatButton)
.addComponent(vatTxtFld, javax.swing.GroupLayout.PREFERRED_SIZE, 23, javax.swing.GroupLayout.PREFERRED_SIZE))
.addGap(40, 40, 40)
.addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
.addComponent(finalTotButton)
.addComponent(finalTotalTxtFld, javax.swing.GroupLayout.PREFERRED_SIZE, 23, javax.swing.GroupLayout.PREFERRED_SIZE))
.addGap(26, 26, 26)
.addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
.addComponent(jLabel4, javax.swing.GroupLayout.PREFERRED_SIZE, 22, javax.swing.GroupLayout.PREFERRED_SIZE)
.addComponent(amountTxtFld, javax.swing.GroupLayout.PREFERRED_SIZE, 22, javax.swing.GroupLayout.PREFERRED_SIZE))
.addGap(33, 33, 33)
.addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
.addComponent(changeButton)
.addComponent(changeTxtFld, javax.swing.GroupLayout.PREFERRED_SIZE, 23, javax.swing.GroupLayout.PREFERRED_SIZE))
.addGap(23, 23, 23))
);
javax.swing.GroupLayout layout = new javax.swing.GroupLayout(this);
this.setLayout(layout);
layout.setHorizontalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(javax.swing.GroupLayout.Alignment.TRAILING, layout.createSequentialGroup()
.addContainerGap()
.addComponent(jPanel1, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
.addContainerGap())
);
layout.setVerticalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addContainerGap()
.addComponent(jPanel1, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
.addContainerGap())
);
}// </editor-fold>
private void totalButtonActionPerformed(java.awt.event.ActionEvent evt) {
num1 = Double.parseDouble(item1TxtFld.getText());
num2 = Double.parseDouble(item2TxtFld.getText());
num3 = Double.parseDouble(item3TxtFld.getText());
totalItems = num1 + num2 + num3;
totalTxtFld.setText(""+d.format(totalItems));
item1TxtFld.setText("");
item2TxtFld.setText("");
item3TxtFld.setText("");
amountTxtFld.setText("");
}
private void vatButtonActionPerformed(java.awt.event.ActionEvent evt) {
vat = totalItems*14/100;
vatTxtFld.setText(""+d.format(vat));
vatTxtFld.setText("");
}
private void finalTotButtonActionPerformed(java.awt.event.ActionEvent evt) {
finTotal = totalItems + vat;
finalTotalTxtFld.setText(""+d.format(finTotal));
}
private void changeButtonActionPerformed(java.awt.event.ActionEvent evt) {
amt = Double.parseDouble(amountTxtFld.getText());
change = amt - finTotal;
changeTxtFld.setText(""+d.format(change));
}
// Variables declaration - do not modify
private javax.swing.JTextField amountTxtFld;
private javax.swing.JButton changeButton;
private javax.swing.JTextField changeTxtFld;
private javax.swing.JButton finalTotButton;
private javax.swing.JTextField finalTotalTxtFld;
private javax.swing.JTextField item1TxtFld;
private javax.swing.JTextField item2TxtFld;
private javax.swing.JTextField item3TxtFld;
private javax.swing.JLabel jLabel1;
private javax.swing.JLabel jLabel2;
private javax.swing.JLabel jLabel3;
private javax.swing.JLabel jLabel4;
private javax.swing.JPanel jPanel1;
private javax.swing.JButton totalButton;
private javax.swing.JTextField totalTxtFld;
private javax.swing.JButton vatButton;
private javax.swing.JTextField vatTxtFld;
// End of variables declaration
}
I would really appreciate it if someone would help me with the developing of a main method for this program. Thank You.