rendered paste bodyimport java.awt.Color;
import java.awt.Font;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.WindowEvent;
import java.awt.event.WindowListener;
import javax.swing.*;
import java.text.*;
//Extending JFrame and
public class TipCalE extends JFrame
implements ActionListener, WindowListener {
//Declaring variables globally
private JButton btnOK;
private JTextField txtName;
private JTextField txtPeople;
private JTextField txtPercent;
private JButton btnCLEAR;
private JLabel lblTip, lblAmount,lblGrand, lblGrandT, lblTP;
private int incorrectInfo = 0;
/**
* NAME: John Reyes
* DATE: Wednesday, February 22, 2012
* COURSE CODE: ICS 4U1-01
* PROGRAM: Tip Calculator
*/
public static void main (String[]args) {
new TipCalE();
}
public TipCalE() {
JLabel lblTitle = new JLabel();
lblTitle.setText("TIP CALCULATOR");
lblTitle.setBounds(160 , 20, 200, 100);
lblTitle.setVerticalAlignment(SwingConstants.TOP);
lblTitle.setFont(new Font("Arial", Font.ITALIC + Font.BOLD, 20));
lblTip = new JLabel();
lblTip.setText("");
lblTip.setBounds(380, 240, 90, 25);
lblTip.setBorder(BorderFactory.createEtchedBorder());
lblTip.setHorizontalAlignment(SwingConstants.CENTER);
lblGrandT = new JLabel();
lblGrandT.setText("");
lblGrandT.setBounds(380, 280, 90, 25);
lblGrandT.setBorder(BorderFactory.createEtchedBorder());
lblGrandT.setHorizontalAlignment(SwingConstants.CENTER);
lblTP = new JLabel();
lblTP.setText("");
lblTP.setBounds(380, 320, 90, 25);
lblTP.setBorder(BorderFactory.createEtchedBorder());
lblTP.setHorizontalAlignment(SwingConstants.CENTER);
txtName = new JTextField();
txtName.setBounds(380, 75, 100, 25);
txtName.setHorizontalAlignment(SwingConstants.CENTER);
txtPeople = new JTextField();
txtPeople.setBounds(380, 115, 100, 25);
txtPeople.setHorizontalAlignment(SwingConstants.CENTER);
txtPercent = new JTextField();
txtPercent.setBounds(380, 155, 100, 25);
txtPercent.setHorizontalAlignment(SwingConstants.CENTER);
//Setting specifications for buttonOK
btnOK = new JButton();
btnOK.setText("OK");
btnOK.setBounds(300, 195, 80, 30);
btnOK.addActionListener(this);
//Setting specifications for buttonCLEAR
btnCLEAR = new JButton();
btnCLEAR.setText("CLEAR");
btnCLEAR.setBounds(390, 195, 80, 30);
btnCLEAR.addActionListener(this);
//Settings specifications for label
JLabel lblBill = new JLabel();
lblBill.setText("Total bill:");
lblBill.setBounds(240, 80, 80, 20);
lblBill.setHorizontalAlignment(SwingConstants.RIGHT);
lblBill.setVerticalAlignment(SwingConstants.TOP);
lblBill.setBorder(BorderFactory.createEmptyBorder());
//Settings specifications for label
JLabel lblPeople = new JLabel();
lblPeople.setText("Total people:");
lblPeople.setBounds(262, 120, 80, 20);
lblPeople.setHorizontalAlignment(SwingConstants.RIGHT);
lblPeople.setVerticalAlignment(SwingConstants.TOP);
lblPeople.setBorder(BorderFactory.createEmptyBorder());
//Settings specifications for label
JLabel lblPercentage = new JLabel();
lblPercentage.setText("Total percentage:");
lblPercentage.setBounds(270, 160, 100, 20);
lblPercentage.setHorizontalAlignment(SwingConstants.RIGHT);
lblPercentage.setVerticalAlignment(SwingConstants.TOP);
lblPercentage.setBorder(BorderFactory.createEmptyBorder());
//Settings specifications for label
lblAmount = new JLabel();
lblAmount.setText("TIP AMOUNT:");
lblAmount.setBounds(245, 240, 100, 20);
lblAmount.setHorizontalAlignment(SwingConstants.RIGHT);
lblAmount.setVerticalAlignment(SwingConstants.TOP);
lblAmount.setBorder(BorderFactory.createEmptyBorder());
//Settings specifications for label
JLabel lblGrand = new JLabel();
lblGrand.setText("GRAND TOTAL:");
lblGrand.setBounds(255, 280, 100, 20);
lblGrand.setHorizontalAlignment(SwingConstants.RIGHT);
lblGrand.setVerticalAlignment(SwingConstants.TOP);
lblGrand.setBorder(BorderFactory.createEmptyBorder());
//Settings specifications for label
JLabel lblTotalP = new JLabel();
lblTotalP.setText("TOTAL/PERSON:");
lblTotalP.setBounds(265, 320, 100, 20);
lblTotalP.setHorizontalAlignment(SwingConstants.RIGHT);
lblTotalP.setVerticalAlignment(SwingConstants.TOP);
lblTotalP.setBorder(BorderFactory.createEmptyBorder());
// Create a JPanel Object
JPanel panel = new JPanel();
panel.add(btnOK);
panel.add(btnCLEAR);
panel.add(lblBill);
panel.add(lblPeople);
panel.add(lblPercentage);
panel.add(lblAmount);
panel.add(lblGrand);
panel.add(lblTotalP);
panel.add(txtName);
panel.add(txtPeople);
panel.add(txtPercent);
panel.add(lblTip);
panel.add(lblGrandT);
panel.add(lblTP);
panel.add(lblTitle);
panel.setLayout(null);
// Set the properties of the frame
setSize(500, 400);
setTitle("Tip Calculator");
setContentPane(panel);
setLocationRelativeTo(null);
setDefaultCloseOperation(JFrame.DO_NOTHING_ON_CLOSE);
setResizable(true);
addWindowListener(this);
setVisible(true);
}
//Make graphics class and import the .png file to JFrame
public void paint (Graphics g) {
super.paint(g);
Graphics2D g2 = (Graphics2D) g;
ImageIcon imgLogo = new ImageIcon("tip_calculator.png");
g2.drawImage(imgLogo.getImage(), 30, 120, this);
}
//If buttonOk is clicked, tip Amount, grand Total and, total per Person is calculated and later outputted into correct JLabels
@Override
public void actionPerformed(ActionEvent e) {
if (e.getSource() == btnOK)
{
try
{
double billTotal = Double.parseDouble(txtName.getText());
int totalPeople = Integer.parseInt(txtPeople.getText());
double tipPercent = Double.parseDouble(txtPercent.getText());
double tipAmount = billTotal * tipPercent/100;
incorrectInfo = 1;
double grandTotal = billTotal + tipAmount;
incorrectInfo = 2;
double totalperPerson = grandTotal / totalPeople;
incorrectInfo = 3;
DecimalFormat df = new DecimalFormat ("$0.00");
lblTip.setText("" + df.format(tipAmount));
lblGrandT.setText("" + df.format(grandTotal));
lblTP.setText("" + df.format(totalperPerson));
}
//If user inputs values that are not numbers, program will output a popup and highlight the incorrectly inputed fields
catch(NumberFormatException a)
{
JOptionPane.showMessageDialog(null, "Please fill in the required fields!", "Invalid data!",JOptionPane.ERROR_MESSAGE);
if (incorrectInfo == 0)
{
txtName.setBackground(Color.RED);
txtPeople.setBackground(Color.WHITE);
txtPercent.setBackground(Color.WHITE);
}
else if (incorrectInfo == 2)
{
txtName.setBackground(Color.WHITE);
txtPeople.setBackground(Color.RED);
txtPercent.setBackground(Color.WHITE);
}
else if (incorrectInfo == 3)
{
txtName.setBackground(Color.WHITE);
txtPeople.setBackground(Color.WHITE);
txtPercent.setBackground(Color.RED);
}
}
}
//Program will reset all fields when buttonClear is clicked
else
{
txtName.setBackground(Color.WHITE);
txtName.setText("0");
txtPeople.setText("1");
txtPercent.setText("0");
txtName.selectAll();
txtName.requestFocus();
lblTip.setText("");
lblGrandT.setText("");
lblTP.setText("");
}
}
//Program listens for User input on the window such as before closing it will ask user "are you sure you want to exit?" it will also listen for if user hits no on popup program will do nothing
public void windowActivated(WindowEvent a) {}
public void windowClosed(WindowEvent a) {}
public void windowClosing(WindowEvent a) {
int exit = JOptionPane.showConfirmDialog(null,
"Are you sure want to exit?",
"Tip Calculator",
JOptionPane.YES_NO_OPTION);
if (exit == JOptionPane.YES_OPTION)
{
System.exit(0);
}
}
public void windowDeactivated(WindowEvent a) {}
public void windowDeiconified(WindowEvent a) {}
public void windowIconified(WindowEvent a) {}
public void windowOpened(WindowEvent a) {}
}