/*
 * @(#)Currencyconverter.java 1.0 02/02/15
 *
 * You can modify the template of this file in the
 * directory ..\JCreator\Templates\Template_1\Project_Name.java
 *
 * You can also create your own project template by making a new
 * folder in the directory ..\JCreator\Template\. Use the other
 * templates as examples.
 *
 */
package myprojects.currencyconverter;

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;


class Currencyconverter extends JFrame implements ActionListener {
	
	private JTextField amount;
	private JTextField rate;
	private JTextField result;
	private JLabel resultLabel, amountLabel, rateLabel;
	private JButton dum;
	private JButton cal;
	
	Container c = getContentPane(); 
	
	public Currencyconverter()
	 {
		addWindowListener(new WindowAdapter() {
			public void windowClosing(WindowEvent e) {
				dispose();
				System.exit(0);
			}
		});
		
		Container c = getContentPane();
	 	c.setLayout(new GridLayout(4,2));
	 	amountLabel = new JLabel("Enter Amount to Exchange: ");
	 	c.add(amountLabel);
	 	amount = new JTextField(10);
	 	c.add(amount);
	 	rateLabel = new JLabel("Enter the rate of Exchange: ");
	 	c.add(rateLabel);
	 	rate = new JTextField(10);
	 	c.add(rate);
	 	resultLabel = new JLabel("Result: ");
	 	c.add(resultLabel);
	 	result = new JTextField(10);
	 	c.add(result);
	 	dum = new JButton("Exit");
	 	c.add(dum);
	 	cal = new JButton("Calculate");
		cal.addActionListener(this);
	 	c.add(cal);
	 	
	 	
	}
	
	public void actionPerformed(ActionEvent ae)
	{
		
		if(ae.getSource() == cal)
		{
		
			result.setText("");
			try{
				//double number1 = Double.parseDouble(amount.getText());
				double number1 = errorMessage(amount.getText());
				//double number2 = Double.parseDouble(rate.getText());
				double number2 = errorMessage(rate.getText());
				
				double res = number1/number2;
				
				
				result.setText(String.valueOf(res));
			}
			catch(NumberFormatException n)
			{
			JOptionPane.showMessageDialog(this, "Only numerics please", "Invalid Number Format",JOptionPane.ERROR_MESSAGE);
			}
			catch (ArithmeticException d)
			{
			JOptionPane.showMessageDialog(this, "Don't use zeroes: ", "One of the two numbers is Zero",JOptionPane.ERROR_MESSAGE);
		}
			catch (myException m)
			{
			JOptionPane.showMessageDialog(this, "Numbers under 5 only please ", "One of the two numbers is Zero",JOptionPane.ERROR_MESSAGE);	
				
			}
			
				
			amount.setText("");
			rate.setText("");
		}
		if(ae.getSource() == dum)
		{
		}

	}

	public static void main(String args[]) {
		System.out.println("Starting Currencyconverter...");
		Currencyconverter mainFrame = new Currencyconverter();
		mainFrame.setSize(350, 140);
		mainFrame.setTitle("Currencyconverter");
		mainFrame.setVisible(true);
	}
	public double errorMessage(String s) throws myException
	{
     double n = Double.parseDouble(s);
	if (n == 0.0d)throw new ArithmeticException("Divide by Zero");
	if (n>5.0) throw new myException();
	return n;

	//double number1 = Double.parseDouble(amount.getText());
	}
	
	class myException extends Exception
	{
		public myException()
		{}
		
	}	
}