import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
public class Burger extends JFrame implements ActionListener
{
JLabel lblForAll, lblBelow, pic, pic1, pic2, pic3, pic4, pic5, pic6, pic7;
JRadioButton rBtn, rBtn1, rBtn2, rBtn3;
JCheckBox cBtn, cBtn1, cBtn2, cBtn3;
JTextField txt, txt1, txt2, txt3, txt4, txt5;
JButton btn1, btn2;
ButtonGroup btnG;
int ham=25, egg=15, bacon=40, chicken=36, coleslow=8, cheese=10, cucumber=12, tomatoe=14;
//ImageIcon ham1 = new ImageIcon("1.png"), egg1 = new ImageIcon("2.png"), bacon1 = new ImageIcon("3.png"), chicken1 = new ImageIcon("4.png");
Burger()
{
super("Burger Ordering System");
setLayout(null);
add(lblForAll = new JLabel("Select Burger: "));
lblForAll.setBounds(10,20,100,20);
add(lblForAll = new JLabel("Add Ons: "));
lblForAll.setBounds(150,20,100,20);
add(rBtn = new JRadioButton("Ham Burger"));
rBtn.setBounds(10,40,100,20);
add(rBtn1 = new JRadioButton("Egg Burger"));
rBtn1.setBounds(10,60,100,20);
add(rBtn2 = new JRadioButton("Bacon Burger"));
rBtn2.setBounds(10,80,130,20);
add(rBtn3 = new JRadioButton("Chicken Burger"));
rBtn3.setBounds(10,100,130,20);
add(txt = new JTextField());
txt.setBounds(150,130,100,20);
txt.setText("0");
add(txt1 = new JTextField());
txt1.setBounds(150,155,100,20);
add(txt2 = new JTextField());
txt2.setBounds(150,180,100,20);
add(txt3 = new JTextField());
txt3.setBounds(150,205,100,20);
add(txt4 = new JTextField());
txt4.setBounds(150,230,100,20);
txt4.setText("0");
add(txt5 = new JTextField());
txt5.setBounds(150,255,100,20);
add(cBtn = new JCheckBox("Coleslaw"));
cBtn.setBounds(150,40,100,20);
cBtn.setOpaque(false);
cBtn.addItemListener(
new ItemListener()
{
public void itemStateChanged(ItemEvent e)
{
String txt1;
if(cBtn.isSelected()==true)
{
txt1=Integer.toString(ham);
txt2.setText(txt1);
cBtn1.setEnabled(false);
cBtn2.setEnabled(false);
cBtn3.setEnabled(false);
}
else
{
cBtn1.setEnabled(true);
cBtn2.setEnabled(true);
cBtn3.setEnabled(true);
txt2.setText("");
}
}
}
);
add(cBtn1 = new JCheckBox("Cheese"));
cBtn1.setBounds(150,60,100,20);
cBtn1.setOpaque(false);
cBtn1.addItemListener(
new ItemListener()
{
public void itemStateChanged(ItemEvent e)
{
String txt1;
if(cBtn1.isSelected()==true)
{
txt1=Integer.toString(cheese);
txt2.setText(txt1);
cBtn.setEnabled(false);
cBtn2.setEnabled(false);
cBtn3.setEnabled(false);
}
else
{
cBtn.setEnabled(true);
cBtn2.setEnabled(true);
cBtn3.setEnabled(true);
txt2.setText("");
}
}
}
);
add(cBtn2 = new JCheckBox("Cucumber"));
cBtn2.setBounds(150,80,100,20);
cBtn2.setOpaque(false);
cBtn2.addItemListener(
new ItemListener()
{
public void itemStateChanged(ItemEvent e)
{
String txt1;
if(cBtn2.isSelected()==true)
{
txt1=Integer.toString(cucumber);
txt2.setText(txt1);
cBtn.setEnabled(false);
cBtn1.setEnabled(false);
cBtn3.setEnabled(false);
}
else
{
cBtn.setEnabled(true);
cBtn1.setEnabled(true);
cBtn3.setEnabled(true);
txt2.setText("");
}
}
}
);
add(cBtn3 = new JCheckBox("Tomatoes"));
cBtn3.setBounds(150,100,100,20);
cBtn3.setOpaque(false);
cBtn3.addItemListener(
new ItemListener()
{
public void itemStateChanged(ItemEvent e)
{
String txt1;
if(cBtn3.isSelected()==true)
{
cBtn.setEnabled(false);
cBtn1.setEnabled(false);
cBtn2.setEnabled(false);
txt1=Integer.toString(tomatoe);
txt2.setText(txt1);
}
else
{
cBtn.setEnabled(true);
cBtn1.setEnabled(true);
cBtn2.setEnabled(true);
txt2.setText("");
}
}
}
);
add(lblBelow = new JLabel("Enter Quantity: "));
lblBelow.setBounds(20,130,130,20);
add(lblBelow = new JLabel("Burger Amount: P"));
lblBelow.setBounds(20,155,130,20);
add(lblBelow = new JLabel("Add-Ons Amount: P"));
lblBelow.setBounds(20,180,130,20);
add(lblBelow = new JLabel("Total Amount: P"));
lblBelow.setBounds(20,205,130,20);
add(lblBelow = new JLabel("Enter Payment: P"));
lblBelow.setBounds(20,230,130,20);
add(lblBelow = new JLabel("Change: P"));
lblBelow.setBounds(20,255,140,20);
add(btn1 = new JButton("Compute Amount"));
btn1.setBounds(20,290,140,20);
btn1.addActionListener(this);
add(btn2 = new JButton("Process Payment"));
btn2.setBounds(180,290,140,20);
btn2.addActionListener(this);
RadioButtonHandler handler = new RadioButtonHandler();
rBtn.addItemListener(handler);
rBtn1.addItemListener(handler);
rBtn2.addItemListener(handler);
rBtn3.addItemListener(handler);
btnG = new ButtonGroup();
btnG.add(rBtn);
btnG.add(rBtn1);
btnG.add(rBtn2);
btnG.add(rBtn3);
txt1.setEditable(false); txt2.setEditable(false); txt3.setEditable(false); txt5.setEditable(false);
setSize(400,500);
setResizable(false);
setVisible(true);
}
public static void main(String[] args)
{
Burger a = new Burger();
a.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
a.setDefaultLookAndFeelDecorated(true);
a.setLocationRelativeTo(null);
}
public void actionPerformed(ActionEvent e)
{
int total, qntty, charge, pay1, quantty, payment1;
String text, qnty, text1, text2, pay, payment;
Boolean validation = true;
if(e.getSource()==btn1)
{
if(txt.getText().equals("0")||txt.getText().equals(""))
{
JOptionPane.showMessageDialog(null, "Enter the quantity of Burger", "Error!", JOptionPane.ERROR_MESSAGE);
txt.requestFocusInWindow();
txt.setText("");
}
else
{
qnty = txt.getText(); text2 = txt2.getText(); quantty = Integer.parseInt(txt1.getText());
if(quantty<=0)
validation = true;
else
validation = false;
if(validation==true)
{
JOptionPane.showMessageDialog(null, "Please enter a valid value", "Error!", JOptionPane.ERROR_MESSAGE);
txt.setText("");
txt.requestFocusInWindow();
}
else
{
qntty = Integer.parseInt(qnty) * Integer.parseInt(txt1.getText());
total = qntty + ( Integer.parseInt(qnty) * Integer.parseInt(text2));
text = Integer.toString(total);
txt3.setText(text);
txt4.requestFocusInWindow();
}
}
}
else
{
int payLength = txt4.getText().length();
pay = txt4.getText();
pay1 = Integer.parseInt(pay);
qnty = txt.getText(); text1 = txt1.getText(); text2 = txt2.getText();
qntty = Integer.parseInt(qnty) * Integer.parseInt(text1);
total = qntty + Integer.parseInt(text2);
Boolean valid = true;
if(pay1<total)
valid = true;
else
valid = false;
try
{
if(txt4.getText().equals(""))
{
throw new NumberFormatException();
}
else
{
if(valid==true)
{
JOptionPane.showMessageDialog(null, "You have insufficient funds", "Error!", JOptionPane.WARNING_MESSAGE);
txt5.setText("");
txt4.requestFocusInWindow();
}
else
{
payment = txt3.getText(); payment1 = Integer.parseInt(payment);
charge = Integer.parseInt(pay) - payment1;
text = Integer.toString(charge);
if(charge<0)
valid = false;
else
valid = true;
if(valid==true)
txt5.setText(text);
else
{
JOptionPane.showMessageDialog(null, "You have insufficient funds", "Error!", JOptionPane.WARNING_MESSAGE);
txt4.requestFocusInWindow();
}
}
}
}
catch(NumberFormatException excep)
{
JOptionPane.showMessageDialog(null, "Please enter a value", "Error!", JOptionPane.WARNING_MESSAGE);
txt5.setText("");
txt4.requestFocusInWindow();
}
/*if(payLength==0||payLength<0||txt4.getText().equals(""))
{
JOptionPane.showMessageDialog(null, "Please enter a value", "Error!", JOptionPane.WARNING_MESSAGE);
txt5.setText("");
txt4.requestFocusInWindow();
}*/
}
}
class RadioButtonHandler implements ItemListener
{
public void itemStateChanged(ItemEvent e)
{
String text;
if(rBtn.isSelected())
{
//add(pic = new JLabel(ham1));
//pic.setBounds(20,310,200,150);
text=Integer.toString(ham);
txt1.setText(text);
txt.setText("1");
//pic1.setBounds(0,0,0,0); pic2.setBounds(0,0,0,0); pic3.setBounds(0,0,0,0);
}
else if(rBtn1.isSelected())
{
//add(pic1 = new JLabel(egg1));
//pic1.setBounds(20,310,200,150);
text=Integer.toString(egg);
txt1.setText(text);
txt.setText("1");
//pic.setBounds(0,0,0,0); pic2.setBounds(0,0,0,0); pic3.setBounds(0,0,0,0);
}
else if(rBtn2.isSelected())
{
//add(pic2 = new JLabel(bacon1));
//pic2.setBounds(20,310,200,150);
text=Integer.toString(bacon);
txt1.setText(text);
txt.setText("1");
//pic.setBounds(0,0,0,0); pic1.setBounds(0,0,0,0); pic3.setBounds(0,0,0,0);
}
else if(rBtn3.isSelected())
{
//add(pic3 = new JLabel(chicken1));
//pic3.setBounds(20,310,200,150);
text=Integer.toString(chicken);
txt1.setText(text);
txt.setText("1");
//pic.setBounds(0,0,0,0); pic1.setBounds(0,0,0,0); pic2.setBounds(0,0,0,0);
}
}
}
}
here's my whole code and my error is on the try and catch of this part..
try
{
if(txt4.getText().equals(""))
{
throw new NumberFormatException();
}
else
{
if(valid==true)
{
JOptionPane.showMessageDialog(null, "You have insufficient funds", "Error!", JOptionPane.WARNING_MESSAGE);
txt5.setText("");
txt4.requestFocusInWindow();
}
else
{
payment = txt3.getText(); payment1 = Integer.parseInt(payment);
charge = Integer.parseInt(pay) - payment1;
text = Integer.toString(charge);
if(charge<0)
valid = false;
else
valid = true;
if(valid==true)
txt5.setText(text);
else
{
JOptionPane.showMessageDialog(null, "You have insufficient funds", "Error!", JOptionPane.WARNING_MESSAGE);
txt4.requestFocusInWindow();
}
}
}
}
catch(NumberFormatException excep)
{
JOptionPane.showMessageDialog(null, "Please enter a value", "Error!", JOptionPane.WARNING_MESSAGE);
txt5.setText("");
txt4.requestFocusInWindow();
}
the numberformatexception is not working.. in that part i need to check if the textfield is empty or not.. i tried various codes like .trim(), .equals(""), .length(), etc.. but it still doesnt work.. i always get thsi too many errors:
> --------------------Configuration: <Default>--------------------
> Exception in thread "AWT-EventQueue-0" java.lang.NumberFormatException: For input string: ""
> at java.lang.NumberFormatException.forInputString(NumberFormatException.java:65)
> at java.lang.Integer.parseInt(Integer.java:504)
> at java.lang.Integer.parseInt(Integer.java:527)
> at Burger.actionPerformed(Burger.java:246)
> at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:2018)
> at javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2341)
> at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:402)
> at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:259)
> at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(BasicButtonListener.java:252)
> at java.awt.Component.processMouseEvent(Component.java:6505)
> at javax.swing.JComponent.processMouseEvent(JComponent.java:3321)
> at java.awt.Component.processEvent(Component.java:6270)
> at java.awt.Container.processEvent(Container.java:2229)
> at java.awt.Component.dispatchEventImpl(Component.java:4861)
> at java.awt.Container.dispatchEventImpl(Container.java:2287)
> at java.awt.Component.dispatchEvent(Component.java:4687)
> at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4832)
> at java.awt.LightweightDispatcher.processMouseEvent(Container.java:4492)
> at java.awt.LightweightDispatcher.dispatchEvent(Container.java:4422)
> at java.awt.Container.dispatchEventImpl(Container.java:2273)
> at java.awt.Window.dispatchEventImpl(Window.java:2719)
> at java.awt.Component.dispatchEvent(Component.java:4687)
> at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:729)
> at java.awt.EventQueue.access$200(EventQueue.java:103)
> at java.awt.EventQueue$3.run(EventQueue.java:688)
> at java.awt.EventQueue$3.run(EventQueue.java:686)
> at java.security.AccessController.doPrivileged(Native Method)
> at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:76)
> at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:87)
> at java.awt.EventQueue$4.run(EventQueue.java:702)
> at java.awt.EventQueue$4.run(EventQueue.java:700)
> at java.security.AccessController.doPrivileged(Native Method)
> at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:76)
> at java.awt.EventQueue.dispatchEvent(EventQueue.java:699)
> at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:242)
> at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:161)
> at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:150)
> at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:146)
> at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:138)
> at java.awt.EventDispatchThread.run(EventDispatchThread.java:91)
can someone help me on making a validation that will work..
