First commit

Billing System/.classpath

@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<classpath>
+	<classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER/org.eclipse.jdt.internal.debug.ui.launcher.StandardVMType/jre1.8.0_221"/>
+	<classpathentry kind="src" path="src"/>
+	<classpathentry kind="output" path="bin"/>
+</classpath>

Billing System/.gitignore

@@ -0,0 +1 @@
+/bin/

Billing System/.project

@@ -0,0 +1,17 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<projectDescription>
+	<name>Billing System</name>
+	<comment></comment>
+	<projects>
+	</projects>
+	<buildSpec>
+		<buildCommand>
+			<name>org.eclipse.jdt.core.javabuilder</name>
+			<arguments>
+			</arguments>
+		</buildCommand>
+	</buildSpec>
+	<natures>
+		<nature>org.eclipse.jdt.core.javanature</nature>
+	</natures>
+</projectDescription>

Billing System/.settings/org.eclipse.jdt.core.prefs

@@ -0,0 +1,11 @@
+eclipse.preferences.version=1
+org.eclipse.jdt.core.compiler.codegen.inlineJsrBytecode=enabled
+org.eclipse.jdt.core.compiler.codegen.targetPlatform=1.8
+org.eclipse.jdt.core.compiler.codegen.unusedLocal=preserve
+org.eclipse.jdt.core.compiler.compliance=1.8
+org.eclipse.jdt.core.compiler.debug.lineNumber=generate
+org.eclipse.jdt.core.compiler.debug.localVariable=generate
+org.eclipse.jdt.core.compiler.debug.sourceFile=generate
+org.eclipse.jdt.core.compiler.problem.assertIdentifier=error
+org.eclipse.jdt.core.compiler.problem.enumIdentifier=error
+org.eclipse.jdt.core.compiler.source=1.8

Billing System/src/billingSystem/BillingSystem.java

@@ -0,0 +1,767 @@
+package billingSystem;
+
+import java.awt.EventQueue;
+import javax.swing.JFrame;
+import java.awt.Color;
+import java.awt.Component;
+import java.util.*;
+import java.text.*;
+import javax.swing.JPanel;
+import javax.swing.border.LineBorder;
+import javax.swing.JCheckBox;
+import java.awt.Font;
+import javax.swing.JTextField;
+import javax.swing.JLabel;
+import javax.swing.JOptionPane;
+import javax.swing.JTextArea;
+import javax.swing.JButton;
+import javax.swing.ImageIcon;
+import javax.swing.JSeparator;
+import java.awt.event.ActionListener;
+import java.awt.event.ActionEvent;
+import javax.swing.ButtonGroup;
+import java.awt.event.WindowAdapter;
+import java.awt.event.WindowEvent;
+import java.awt.event.KeyAdapter;
+import java.awt.event.KeyEvent;
+
+public class BillingSystem {
+
+	private JFrame frmBillingSystem;
+	private JTextField textFieldLabour;
+	private JTextField textFieldTravel;
+	private JTextField textFieldPlastic;
+	private JTextField textFieldCooper;
+	private JTextField textFieldChrome;
+	private JTextField textFieldCostOfMaterial;
+	private JTextField textFieldCostOfLabor;
+	private JTextField textFieldTaxable;
+	private JTextField textFieldVAT;
+	private JTextField textFieldMileage;
+	private JTextField textFieldTax;
+	private JTextField textFieldSubtotal;
+	private JTextField textFieldTotal;
+	private final ButtonGroup buttonGroup = new ButtonGroup();
+
+	/**
+	 * Launch the application.
+	 */
+	public static void main(String[] args) {
+		EventQueue.invokeLater(new Runnable() {
+			public void run() {
+				try {
+					BillingSystem window = new BillingSystem();
+					window.frmBillingSystem.setVisible(true);
+				} catch (Exception e) {
+					e.printStackTrace();
+				}
+			}
+		});
+	}
+
+	/**
+	 * Create the application.
+	 */
+	public BillingSystem() {
+		initialize();
+		frmBillingSystem.setLocationRelativeTo(null);
+	}
+
+	/**
+	 * Initialize the contents of the frame.
+	 */
+	private void initialize() {
+		frmBillingSystem = new JFrame();
+		frmBillingSystem.addWindowListener(new WindowAdapter() {
+			@Override
+			public void windowActivated(WindowEvent arg0) {
+				textFieldLabour.setEnabled(false);
+				textFieldLabour.setText("0");
+
+				textFieldTravel.setEnabled(false);
+				textFieldTravel.setText("0");
+
+				textFieldPlastic.setEnabled(false);
+				textFieldPlastic.setText("0");
+
+				textFieldCooper.setEnabled(false);
+				textFieldCooper.setText("0");
+
+				textFieldChrome.setEnabled(false);
+				textFieldChrome.setText("0");
+
+				textFieldCostOfMaterial.setEnabled(false);
+				textFieldCostOfMaterial.setText("0");
+
+				textFieldCostOfLabor.setEnabled(false);
+				textFieldCostOfLabor.setText("0");
+
+				textFieldTaxable.setEnabled(false);
+				textFieldTaxable.setText("0");
+
+				textFieldVAT.setEnabled(false);
+				textFieldVAT.setText("0");
+
+				textFieldMileage.setEnabled(false);
+				textFieldMileage.setText("0");
+
+				textFieldTax.setEnabled(false);
+				textFieldTax.setText("0");
+
+				textFieldSubtotal.setEnabled(false);
+				textFieldSubtotal.setText("0");
+
+				textFieldTotal.setEnabled(false);
+				textFieldTotal.setText("0");
+
+			}
+		});
+		frmBillingSystem.getContentPane().setBackground(new Color(153, 204, 51));
+		frmBillingSystem.setTitle("Billing System");
+		frmBillingSystem.setBounds(0, 0, 1280, 720);
+		frmBillingSystem.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
+		frmBillingSystem.getContentPane().setLayout(null);
+
+		JPanel panel = new JPanel();
+		panel.setBorder(new LineBorder(new Color(0, 0, 0), 4));
+		panel.setBounds(10, 11, 1244, 76);
+		frmBillingSystem.getContentPane().add(panel);
+		panel.setLayout(null);
+
+		JLabel lblBillingSystem = new JLabel("Billing System");
+		lblBillingSystem.setFont(new Font("Tahoma", Font.BOLD, 50));
+		lblBillingSystem.setBounds(390, 0, 358, 61);
+		panel.add(lblBillingSystem);
+
+		JLabel lblNewLabel_1 = new JLabel("");
+		lblNewLabel_1.setIcon(new ImageIcon("C:\\Users\\Dan\\Desktop\\Icons\\Logo0.png"));
+		lblNewLabel_1.setBounds(10, 11, 64, 53);
+		panel.add(lblNewLabel_1);
+
+		JPanel panel_1 = new JPanel();
+		panel_1.setBorder(new LineBorder(new Color(0, 0, 0), 4));
+		panel_1.setBounds(896, 98, 358, 492);
+		frmBillingSystem.getContentPane().add(panel_1);
+		panel_1.setLayout(null);
+
+		JTextArea textReceipt = new JTextArea();
+		textReceipt.setBounds(10, 11, 338, 470);
+		panel_1.add(textReceipt);
+
+		JPanel panel_2 = new JPanel();
+		panel_2.setBorder(new LineBorder(new Color(0, 0, 0), 4));
+		panel_2.setBounds(10, 98, 876, 492);
+		frmBillingSystem.getContentPane().add(panel_2);
+		panel_2.setLayout(null);
+
+		JCheckBox cbxLabour = new JCheckBox("Labour");
+		cbxLabour.addActionListener(new ActionListener() {
+			public void actionPerformed(ActionEvent e) {
+
+				if(cbxLabour.isSelected()) {
+					textFieldLabour.setEnabled(true);
+					textFieldLabour.setText(null);
+					textFieldLabour.requestFocus();
+
+				}else {
+					textFieldLabour.setEnabled(false);
+					textFieldLabour.setText("0");
+				}
+			}
+		});
+		cbxLabour.setFont(new Font("Tahoma", Font.BOLD, 30));
+		cbxLabour.setBounds(23, 43, 131, 45);
+		panel_2.add(cbxLabour);
+
+		textFieldLabour = new JTextField();
+		textFieldLabour.addKeyListener(new KeyAdapter() {
+			@Override
+			public void keyTyped(KeyEvent e) {
+
+				Child_Billing OnlyNumbers = new Child_Billing();
+				try {
+					OnlyNumbers.NumbersOnly(e);
+				} catch (NumberFormatException ex) {
+					JOptionPane.showConfirmDialog(null, "Billing System");
+				}
+			}
+		});
+		textFieldLabour.setFont(new Font("Tahoma", Font.PLAIN, 20));
+		textFieldLabour.setBounds(184, 55, 161, 20);
+		panel_2.add(textFieldLabour);
+		textFieldLabour.setColumns(10);
+
+		textFieldTravel = new JTextField();
+		textFieldTravel.addKeyListener(new KeyAdapter() {
+			@Override
+			public void keyTyped(KeyEvent e) {
+				Child_Billing OnlyNumbers = new Child_Billing();
+				try {
+					OnlyNumbers.NumbersOnly(e);
+				} catch (NumberFormatException ex) {
+					JOptionPane.showConfirmDialog(null, "Billing System");
+				}
+			}
+		});
+		textFieldTravel.setFont(new Font("Tahoma", Font.PLAIN, 20));
+		textFieldTravel.setColumns(10);
+		textFieldTravel.setBounds(184, 107, 161, 20);
+		panel_2.add(textFieldTravel);
+
+		textFieldPlastic = new JTextField();
+		textFieldPlastic.addKeyListener(new KeyAdapter() {
+			@Override
+			public void keyTyped(KeyEvent e) {
+				Child_Billing OnlyNumbers = new Child_Billing();
+				try {
+					OnlyNumbers.NumbersOnly(e);
+				} catch (NumberFormatException ex) {
+					JOptionPane.showConfirmDialog(null, "Billing System");
+				}
+			}
+		});
+		textFieldPlastic.setFont(new Font("Tahoma", Font.PLAIN, 20));
+		textFieldPlastic.setColumns(10);
+		textFieldPlastic.setBounds(184, 154, 161, 20);
+		panel_2.add(textFieldPlastic);
+
+		textFieldCooper = new JTextField();
+		textFieldCooper.addKeyListener(new KeyAdapter() {
+			@Override
+			public void keyTyped(KeyEvent e) {
+				Child_Billing OnlyNumbers = new Child_Billing();
+				try {
+					OnlyNumbers.NumbersOnly(e);
+				} catch (NumberFormatException ex) {
+					JOptionPane.showConfirmDialog(null, "Billing System");
+				}
+			}
+		});
+		textFieldCooper.setFont(new Font("Tahoma", Font.PLAIN, 20));
+		textFieldCooper.setColumns(10);
+		textFieldCooper.setBounds(184, 198, 161, 20);
+		panel_2.add(textFieldCooper);
+
+		textFieldChrome = new JTextField();
+		textFieldChrome.addKeyListener(new KeyAdapter() {
+			@Override
+			public void keyTyped(KeyEvent e) {
+				Child_Billing OnlyNumbers = new Child_Billing();
+				try {
+					OnlyNumbers.NumbersOnly(e);
+				} catch (NumberFormatException ex) {
+					JOptionPane.showConfirmDialog(null, "Billing System");
+				}
+			}
+		});
+		textFieldChrome.setFont(new Font("Tahoma", Font.PLAIN, 20));
+		textFieldChrome.setColumns(10);
+		textFieldChrome.setBounds(184, 239, 161, 20);
+		panel_2.add(textFieldChrome);
+
+		JLabel lblNewLabel = new JLabel("Cost of Material");
+		lblNewLabel.setFont(new Font("Tahoma", Font.BOLD, 30));
+		lblNewLabel.setBounds(409, 47, 238, 37);
+		panel_2.add(lblNewLabel);
+
+		JLabel lblCostOf = new JLabel("Cost of Labor");
+		lblCostOf.setFont(new Font("Tahoma", Font.BOLD, 30));
+		lblCostOf.setBounds(409, 99, 217, 37);
+		panel_2.add(lblCostOf);
+
+		JLabel lblTaxable = new JLabel("Taxable");
+		lblTaxable.setFont(new Font("Tahoma", Font.BOLD, 30));
+		lblTaxable.setBounds(409, 227, 118, 37);
+		panel_2.add(lblTaxable);
+
+		JLabel lblVat = new JLabel("VAT");
+		lblVat.setFont(new Font("Tahoma", Font.BOLD, 30));
+		lblVat.setBounds(409, 190, 59, 37);
+		panel_2.add(lblVat);
+
+		JLabel lblMileage = new JLabel("Mileage");
+		lblMileage.setFont(new Font("Tahoma", Font.BOLD, 30));
+		lblMileage.setBounds(409, 142, 118, 37);
+		panel_2.add(lblMileage);
+
+		textFieldCostOfMaterial = new JTextField();
+		textFieldCostOfMaterial.setFont(new Font("Tahoma", Font.PLAIN, 20));
+		textFieldCostOfMaterial.setColumns(10);
+		textFieldCostOfMaterial.setBounds(670, 55, 178, 20);
+		panel_2.add(textFieldCostOfMaterial);
+
+		textFieldCostOfLabor = new JTextField();
+		textFieldCostOfLabor.setFont(new Font("Tahoma", Font.PLAIN, 20));
+		textFieldCostOfLabor.setColumns(10);
+		textFieldCostOfLabor.setBounds(670, 107, 178, 20);
+		panel_2.add(textFieldCostOfLabor);
+
+		textFieldTaxable = new JTextField();
+		textFieldTaxable.setFont(new Font("Tahoma", Font.PLAIN, 20));
+		textFieldTaxable.setColumns(10);
+		textFieldTaxable.setBounds(670, 239, 178, 20);
+		panel_2.add(textFieldTaxable);
+
+		textFieldVAT = new JTextField();
+		textFieldVAT.setFont(new Font("Tahoma", Font.PLAIN, 20));
+		textFieldVAT.setColumns(10);
+		textFieldVAT.setBounds(670, 198, 178, 20);
+		panel_2.add(textFieldVAT);
+
+		textFieldMileage = new JTextField();
+		textFieldMileage.setFont(new Font("Tahoma", Font.PLAIN, 20));
+		textFieldMileage.setColumns(10);
+		textFieldMileage.setBounds(670, 154, 178, 20);
+		panel_2.add(textFieldMileage);
+
+		textFieldTax = new JTextField();
+		textFieldTax.setFont(new Font("Tahoma", Font.PLAIN, 20));
+		textFieldTax.setColumns(10);
+		textFieldTax.setBounds(670, 365, 178, 20);
+		panel_2.add(textFieldTax);
+
+		textFieldSubtotal = new JTextField();
+		textFieldSubtotal.setFont(new Font("Tahoma", Font.PLAIN, 20));
+		textFieldSubtotal.setColumns(10);
+		textFieldSubtotal.setBounds(670, 410, 178, 20);
+		panel_2.add(textFieldSubtotal);
+
+		textFieldTotal = new JTextField();
+		textFieldTotal.setFont(new Font("Tahoma", Font.PLAIN, 20));
+		textFieldTotal.setColumns(10);
+		textFieldTotal.setBounds(670, 452, 178, 20);
+		panel_2.add(textFieldTotal);
+
+		JLabel lblTax = new JLabel("Tax");
+		lblTax.setFont(new Font("Tahoma", Font.BOLD, 30));
+		lblTax.setBounds(409, 357, 54, 37);
+		panel_2.add(lblTax);
+
+		JLabel lblSubtotal = new JLabel("Subtotal");
+		lblSubtotal.setFont(new Font("Tahoma", Font.BOLD, 30));
+		lblSubtotal.setBounds(409, 402, 127, 37);
+		panel_2.add(lblSubtotal);
+
+		JLabel lblTotal = new JLabel("Total");
+		lblTotal.setFont(new Font("Tahoma", Font.BOLD, 30));
+		lblTotal.setBounds(409, 444, 76, 37);
+		panel_2.add(lblTotal);
+
+		JCheckBox cbxTravel = new JCheckBox("Travel");
+		cbxTravel.addActionListener(new ActionListener() {
+			public void actionPerformed(ActionEvent e) {
+				if(cbxTravel.isSelected()) {
+					textFieldTravel.setEnabled(true);
+					textFieldTravel.setText(null);
+					textFieldTravel.requestFocus();
+
+				}else {
+					textFieldTravel.setEnabled(false);
+					textFieldTravel.setText("0");
+				}
+			}
+		});
+		cbxTravel.setFont(new Font("Tahoma", Font.BOLD, 30));
+		cbxTravel.setBounds(23, 91, 119, 45);
+		panel_2.add(cbxTravel);
+
+		JCheckBox cbxPlastic = new JCheckBox("Plastic");
+		cbxPlastic.addActionListener(new ActionListener() {
+			public void actionPerformed(ActionEvent e) {
+				if(cbxPlastic.isSelected()) {
+					textFieldPlastic.setEnabled(true);
+					textFieldPlastic.setText(null);
+					textFieldPlastic.requestFocus();
+
+				}else {
+					textFieldPlastic.setEnabled(false);
+					textFieldPlastic.setText("0");
+				}
+			}
+		});
+		cbxPlastic.setFont(new Font("Tahoma", Font.BOLD, 30));
+		cbxPlastic.setBounds(23, 137, 125, 45);
+		panel_2.add(cbxPlastic);
+
+		JCheckBox cbxCooper = new JCheckBox("Cooper");
+		cbxCooper.addActionListener(new ActionListener() {
+			public void actionPerformed(ActionEvent e) {
+				if(cbxCooper.isSelected()) {
+					textFieldCooper.setEnabled(true);
+					textFieldCooper.setText(null);
+					textFieldCooper.requestFocus();
+
+				}else {
+					textFieldCooper.setEnabled(false);
+					textFieldCooper.setText("0");
+				}
+			}
+		});
+		cbxCooper.setFont(new Font("Tahoma", Font.BOLD, 30));
+		cbxCooper.setBounds(23, 180, 133, 45);
+		panel_2.add(cbxCooper);
+
+		JCheckBox cbxChrome = new JCheckBox("Chrome");
+		cbxChrome.addActionListener(new ActionListener() {
+			public void actionPerformed(ActionEvent e) {
+				if(cbxChrome.isSelected()) {
+					textFieldChrome.setEnabled(true);
+					textFieldChrome.setText(null);
+					textFieldChrome.requestFocus();
+
+				}else {
+					textFieldChrome.setEnabled(false);
+					textFieldChrome.setText("0");
+				}
+			}
+		});
+		cbxChrome.setFont(new Font("Tahoma", Font.BOLD, 30));
+		cbxChrome.setBounds(22, 223, 143, 45);
+		panel_2.add(cbxChrome);
+
+		JCheckBox chk0 = new JCheckBox("0%");
+		chk0.setSelected(true);
+		buttonGroup.add(chk0);
+		chk0.setFont(new Font("Tahoma", Font.BOLD, 25));
+		chk0.setBounds(24, 358, 71, 39);
+		panel_2.add(chk0);
+
+		JCheckBox chk5 = new JCheckBox("5%");
+		buttonGroup.add(chk5);
+		chk5.setFont(new Font("Tahoma", Font.BOLD, 25));
+		chk5.setBounds(24, 400, 71, 39);
+		panel_2.add(chk5);
+
+		JCheckBox chk10 = new JCheckBox("10%");
+		buttonGroup.add(chk10);
+		chk10.setFont(new Font("Tahoma", Font.BOLD, 25));
+		chk10.setBounds(23, 442, 87, 39);
+		panel_2.add(chk10);
+
+		JCheckBox chk15 = new JCheckBox("15%");
+		buttonGroup.add(chk15);
+		chk15.setFont(new Font("Tahoma", Font.BOLD, 25));
+		chk15.setBounds(245, 360, 87, 39);
+		panel_2.add(chk15);
+
+		JCheckBox chk20 = new JCheckBox("20%");
+		buttonGroup.add(chk20);
+		chk20.setFont(new Font("Tahoma", Font.BOLD, 25));
+		chk20.setBounds(245, 402, 87, 39);
+		panel_2.add(chk20);
+
+		JCheckBox chk25 = new JCheckBox("25%");
+		buttonGroup.add(chk25);
+		chk25.setFont(new Font("Tahoma", Font.BOLD, 25));
+		chk25.setBounds(245, 446, 87, 39);
+		panel_2.add(chk25);
+
+		JLabel lblDiscount = new JLabel("Discount");
+		lblDiscount.setFont(new Font("Tahoma", Font.BOLD, 25));
+		lblDiscount.setBounds(111, 320, 110, 31);
+		panel_2.add(lblDiscount);
+
+		JSeparator separator = new JSeparator();
+		separator.setBounds(23, 307, 825, 2);
+		panel_2.add(separator);
+
+		JSeparator separator_1 = new JSeparator();
+		separator_1.setBounds(373, 307, 1, 174);
+		panel_2.add(separator_1);
+
+		JSeparator separator_2 = new JSeparator();
+		separator_2.setBounds(373, 48, 1, 433);
+		panel_2.add(separator_2);
+
+		JPanel panel_4 = new JPanel();
+		panel_4.setBorder(new LineBorder(new Color(0, 0, 0), 4));
+		panel_4.setBounds(10, 605, 1244, 66);
+		frmBillingSystem.getContentPane().add(panel_4);
+		panel_4.setLayout(null);
+
+		JButton btnExit = new JButton("Exit");
+		btnExit.addActionListener(new ActionListener() {
+			public void actionPerformed(ActionEvent arg0) {
+				Child_Billing iExit = new Child_Billing();
+				try {
+					iExit.iExitSystem();
+				} catch (NumberFormatException e) {
+					JOptionPane.showConfirmDialog(null	, "Billing system error");
+				}
+			}
+		});
+		btnExit.setFont(new Font("Tahoma", Font.BOLD, 35));
+		btnExit.setBounds(1010, 8, 147, 51);
+		panel_4.add(btnExit);
+
+		JButton btnReset = new JButton("Reset");
+		btnReset.addActionListener(new ActionListener() {
+			public void actionPerformed(ActionEvent e) {
+
+				JTextField clearText = null;
+
+				for(Component c: panel_2.getComponents()) {
+					if (c.getClass().toString().contains("javax.swing.JTextField")) {
+						clearText = (JTextField)c;
+						clearText.setText("");
+						clearText.setEnabled(false);
+					}
+				}
+				//--------------------------------------------------------------
+				JCheckBox checker = null;
+				textReceipt.setText(null);
+				for(java.awt.Component q: panel_2.getComponents()) {
+					if (q.getClass().toString().contains("javax.swing.JCheckBox")) {
+						checker = (JCheckBox)q;
+						checker.setSelected(false);
+						chk0.setSelected(true);
+					}
+				}
+			}
+		});
+		btnReset.setFont(new Font("Tahoma", Font.BOLD, 35));
+		btnReset.setBounds(700, 8, 160, 51);
+		panel_4.add(btnReset);
+
+		JButton btnRecipt = new JButton("Receipt");
+		btnRecipt.addActionListener(new ActionListener() {
+			public void actionPerformed(ActionEvent a) {
+
+				int refs = 1000 + (int)(Math.random()*9545);
+
+				Calendar timer = Calendar.getInstance();
+				timer.getTime();
+				SimpleDateFormat tTime = new SimpleDateFormat("HH:mm:ss");
+				tTime.format(timer.getTime());
+				SimpleDateFormat tDate = new SimpleDateFormat("dd-MM-yyyy");
+				tDate.format(timer.getTime());
+				//----------------------------Receipt----------------------------
+
+				textReceipt.append("\tBilling System:\n" + "Reference:\t\t\t" + refs + 
+						"\n================================================\n" + 
+						"Labour:\t\t\t" + textFieldLabour.getText() + "\n\n" +
+						"Travel:\t\t\t" + textFieldTravel.getText() + "\n\n" +
+						"Plastic:\t\t\t" + textFieldPlastic.getText() + "\n\n" +
+						"Cooper:\t\t\t" + textFieldCooper.getText() + "\n\n" +
+						"Chrome:\t\t\t" + textFieldChrome.getText() + "\n\n" +
+						"VAT:\t\t\t" + textFieldVAT.getText() + "\n\n" +
+						"================================================\n"+
+
+						"Tax:\t\t\t" + textFieldTax.getText() + "\n\n" +
+						"Subtotal:\t\t\t" + textFieldSubtotal.getText() + "\n\n" +
+						"Total:\t\t\t" + textFieldTotal.getText() + "\n\n" +
+
+						"================================================\n\n"+
+						tDate.format(timer.getTime()) + "\n"+
+						tTime.format(timer.getTime()) + "\n"+
+						"\nThank you!"
+						);		
+			}
+		});
+		btnRecipt.setFont(new Font("Tahoma", Font.BOLD, 35));
+		btnRecipt.setBounds(350, 8, 189, 51);
+		panel_4.add(btnRecipt);
+
+		JButton btnTotal = new JButton("Total");
+		btnTotal.addActionListener(new ActionListener() {
+			public void actionPerformed(ActionEvent e) {
+
+				double iVAT, iTax, iSubtotal, iTotal;
+				Child_Billing Cost_Of_Material = new Child_Billing();
+				Cost_Of_Material.Labour = Cost_Of_Material.pLabour * Double.parseDouble(textFieldLabour.getText());
+				Cost_Of_Material.Travel = Cost_Of_Material.pTravel * Double.parseDouble(textFieldTravel.getText());
+				Cost_Of_Material.Plastic = Cost_Of_Material.pPlastic * Double.parseDouble(textFieldPlastic.getText());
+				Cost_Of_Material.Cooper = Cost_Of_Material.pCooper * Double.parseDouble(textFieldCooper.getText());
+				Cost_Of_Material.Chrome = Cost_Of_Material.pChrome * Double.parseDouble(textFieldChrome.getText());
+
+				//--------------------------------0%-----------------------------------------------------------
+
+				if(chk0.isSelected()) {
+					iSubtotal = Cost_Of_Material.GetAmount();
+					iTax = Cost_Of_Material.cFindTax(iSubtotal);
+					iVAT = Cost_Of_Material.cVATTax(iTax);
+					iTotal = iSubtotal + iTax + iVAT;
+
+					String subtotal = String.format("%.2f", iSubtotal);
+					textFieldSubtotal.setText(subtotal);
+					textFieldTaxable.setText(subtotal);
+
+					String vat = String.format("%.2f", iVAT);
+					textFieldVAT.setText(vat);
+
+					String tax = String.format("%.2f", iTax);
+					textFieldTax.setText(tax);
+
+					String total = String.format("%.2f", iTotal);
+					textFieldTotal.setText(total);
+
+
+					textFieldCostOfMaterial.setText(String.format("%.2f",Cost_Of_Material.pChrome + Cost_Of_Material.pCooper
+							+ Cost_Of_Material.pPlastic));
+
+					textFieldCostOfLabor.setText(String.format("%.2f",Cost_Of_Material.Labour));
+					textFieldMileage.setText(String.format("%.2f",Cost_Of_Material.Travel));
+				}
+				//--------------------------------5%-----------------------------------------------------------
+
+				if(chk5.isSelected()) {
+					iSubtotal = Cost_Of_Material.GetAmount();
+					iSubtotal = iSubtotal-((iSubtotal*5)/100);
+					iTax = Cost_Of_Material.cFindTax(iSubtotal);
+					iVAT = Cost_Of_Material.cVATTax(iTax);
+					iTotal = iSubtotal + iTax + iVAT;
+
+					String subtotal = String.format("%.2f", iSubtotal);
+					textFieldSubtotal.setText(subtotal);
+					textFieldTaxable.setText(subtotal);
+
+					String vat = String.format("%.2f", iVAT);
+					textFieldVAT.setText(vat);
+
+					String tax = String.format("%.2f", iTax);
+					textFieldTax.setText(tax);
+
+					String total = String.format("%.2f", iTotal);
+					textFieldTotal.setText(total);
+
+
+					textFieldCostOfMaterial.setText(String.format("%.2f",Cost_Of_Material.pChrome + Cost_Of_Material.pCooper
+							+ Cost_Of_Material.pPlastic));
+
+					textFieldCostOfLabor.setText(String.format("%.2f",Cost_Of_Material.Labour));
+					textFieldMileage.setText(String.format("%.2f",Cost_Of_Material.Travel));
+				}
+				//--------------------------------10%-----------------------------------------------------------
+
+				if(chk10.isSelected()) {
+					iSubtotal = Cost_Of_Material.GetAmount();
+					iSubtotal = iSubtotal-((iSubtotal*10)/100);
+					iTax = Cost_Of_Material.cFindTax(iSubtotal);
+					iVAT = Cost_Of_Material.cVATTax(iTax);
+					iTotal = iSubtotal + iTax + iVAT;
+
+					String subtotal = String.format("%.2f", iSubtotal);
+					textFieldSubtotal.setText(subtotal);
+					textFieldTaxable.setText(subtotal);
+
+					String vat = String.format("%.2f", iVAT);
+					textFieldVAT.setText(vat);
+
+					String tax = String.format("%.2f", iTax);
+					textFieldTax.setText(tax);
+
+					String total = String.format("%.2f", iTotal);
+					textFieldTotal.setText(total);
+
+
+					textFieldCostOfMaterial.setText(String.format("%.2f",Cost_Of_Material.pChrome + Cost_Of_Material.pCooper
+							+ Cost_Of_Material.pPlastic));
+
+					textFieldCostOfLabor.setText(String.format("%.2f",Cost_Of_Material.Labour));
+					textFieldMileage.setText(String.format("%.2f",Cost_Of_Material.Travel));
+				}
+				//--------------------------------15%-----------------------------------------------------------
+
+				if(chk15.isSelected()) {
+					iSubtotal = Cost_Of_Material.GetAmount();
+					iSubtotal = iSubtotal-((iSubtotal*15)/100);
+					iTax = Cost_Of_Material.cFindTax(iSubtotal);
+					iVAT = Cost_Of_Material.cVATTax(iTax);
+					iTotal = iSubtotal + iTax + iVAT;
+
+					String subtotal = String.format("%.2f", iSubtotal);
+					textFieldSubtotal.setText(subtotal);
+					textFieldTaxable.setText(subtotal);
+
+					String vat = String.format("%.2f", iVAT);
+					textFieldVAT.setText(vat);
+
+					String tax = String.format("%.2f", iTax);
+					textFieldTax.setText(tax);
+
+					String total = String.format("%.2f", iTotal);
+					textFieldTotal.setText(total);
+
+
+					textFieldCostOfMaterial.setText(String.format("%.2f",Cost_Of_Material.pChrome + Cost_Of_Material.pCooper
+							+ Cost_Of_Material.pPlastic));
+
+					textFieldCostOfLabor.setText(String.format("%.2f",Cost_Of_Material.Labour));
+					textFieldMileage.setText(String.format("%.2f",Cost_Of_Material.Travel));
+				}
+				//--------------------------------20%-----------------------------------------------------------
+
+				if(chk20.isSelected()) {
+					iSubtotal = Cost_Of_Material.GetAmount();
+					iSubtotal = iSubtotal-((iSubtotal*20)/100);
+					iTax = Cost_Of_Material.cFindTax(iSubtotal);
+					iVAT = Cost_Of_Material.cVATTax(iTax);
+					iTotal = iSubtotal + iTax + iVAT;
+
+					String subtotal = String.format("%.2f", iSubtotal);
+					textFieldSubtotal.setText(subtotal);
+					textFieldTaxable.setText(subtotal);
+
+					String vat = String.format("%.2f", iVAT);
+					textFieldVAT.setText(vat);
+
+					String tax = String.format("%.2f", iTax);
+					textFieldTax.setText(tax);
+
+					String total = String.format("%.2f", iTotal);
+					textFieldTotal.setText(total);
+
+
+					textFieldCostOfMaterial.setText(String.format("%.2f",Cost_Of_Material.pChrome + Cost_Of_Material.pCooper
+							+ Cost_Of_Material.pPlastic));
+
+					textFieldCostOfLabor.setText(String.format("%.2f",Cost_Of_Material.Labour));
+					textFieldMileage.setText(String.format("%.2f",Cost_Of_Material.Travel));
+				}
+				//--------------------------------25%-----------------------------------------------------------
+
+				if(chk25.isSelected()) {
+					iSubtotal = Cost_Of_Material.GetAmount();
+					iSubtotal = iSubtotal-((iSubtotal*25)/100);
+					iTax = Cost_Of_Material.cFindTax(iSubtotal);
+					iVAT = Cost_Of_Material.cVATTax(iTax);
+					iTotal = iSubtotal + iTax + iVAT;
+
+					String subtotal = String.format("%.2f", iSubtotal);
+					textFieldSubtotal.setText(subtotal);
+					textFieldTaxable.setText(subtotal);
+
+					String vat = String.format("%.2f", iVAT);
+					textFieldVAT.setText(vat);
+
+					String tax = String.format("%.2f", iTax);
+					textFieldTax.setText(tax);
+
+					String total = String.format("%.2f", iTotal);
+					textFieldTotal.setText(total);
+
+
+					textFieldCostOfMaterial.setText(String.format("%.2f",Cost_Of_Material.pChrome + Cost_Of_Material.pCooper
+							+ Cost_Of_Material.pPlastic));
+
+					textFieldCostOfLabor.setText(String.format("%.2f",Cost_Of_Material.Labour));
+					textFieldMileage.setText(String.format("%.2f",Cost_Of_Material.Travel));
+				}
+				//--------------------------------Enable Text-----------------------------------------------------------
+				JTextField clearText = null;
+
+				for(Component c: panel_2.getComponents()) {
+					if (c.getClass().toString().contains("javax.swing.JTextField")) {
+						clearText = (JTextField)c;
+						clearText.setEnabled(true);
+					}
+				}	
+			}
+
+		});
+		btnTotal.setFont(new Font("Tahoma", Font.BOLD, 35));
+		btnTotal.setBounds(100, 8, 133, 51);
+		panel_4.add(btnTotal);
+	}
+
+}

Billing System/src/billingSystem/Child_Billing.java

@@ -0,0 +1,5 @@
+package billingSystem;
+
+public class Child_Billing extends Parent_Billing {
+
+}

Billing System/src/billingSystem/Parent_Billing.java

@@ -0,0 +1,65 @@
+package billingSystem;
+
+import java.awt.event.*;
+import javax.swing.JFrame;
+import javax.swing.JOptionPane;
+
+
+public class Parent_Billing {
+
+	public double Labour;
+	public double Travel;
+	public double Plastic;
+	public double Cooper;
+	public double Chrome;
+	public double Tax;
+	public double VAT;
+	public double MaterialCost;
+
+	public double pLabour = 43;
+	public double pTravel = 6.5;
+	public double pPlastic = 4.75;
+	public double pCooper = 9.8;
+	public double pChrome = 7.5;
+	public double pTax = 0.90;
+	public double pVAT = 0.90;
+
+	//---------------------Cost-------------------------------
+	public double GetAmount() {
+		MaterialCost = Labour + Travel + Plastic + Cooper + Chrome;
+		return MaterialCost;
+	}
+	//---------------------Tax-------------------------------
+	public Double cFindTax(double cAmount) {
+		double FindTax = cAmount-(cAmount*pTax);
+		return FindTax;
+	}
+	//---------------------VAT-------------------------------
+	public Double cVATTax(double cAmount) {
+		double FindTax = cAmount-(cAmount*pVAT);
+		return FindTax;
+	}
+	//---------------------Exit-------------------------------
+	public JFrame frame;
+	public void iExitSystem() {
+		frame=new JFrame();
+		if(JOptionPane.showConfirmDialog(frame, "Confirm if you want to exit",
+				"Billing system", JOptionPane.YES_NO_OPTION)
+				==JOptionPane.YES_NO_OPTION) {
+			System.exit(0);
+		}
+	}
+
+	//---------------------NumbersOnly-------------------------------
+
+	public void NumbersOnly(java.awt.event.KeyEvent evt) {
+		char iNumber = evt.getKeyChar();
+		if (!(Character.isDigit(iNumber))
+				||(iNumber==KeyEvent.VK_BACK_SPACE)
+				||(iNumber==KeyEvent.VK_DELETE)){
+			evt.consume();
+		}
+
+	}
+
+}