import java.text.DecimalFormat;
import javax.swing.*;
import javax.swing.border.Border;

import java.awt.event.*;
import java.awt.*;

/*
* Written By : Ahmad Jawed ZAFAR
*Date : 20/02/2009
*
*/

public class JavaScientificCalculator extends JFrame
{
	private JTextField text1, text2, textSc;
	private JPanel panel, panel2, panelScButtons, panelScVal, panelResult;
	private String BNames[] = {"+","-","*","÷","%","Power"};
	private String BNames2[] = {"Sin","Cos","Tan","Log10","Loge","To Rad","To Deg","Root","!"};
	private JButton buttons[], buttons2[];
	private JLabel label1, labelSc, labelN1, labelN2, labelResult;
	
	public JavaScientificCalculator() // constructor
	{
		super("Java Scientific Calculator");
		
		Container container = getContentPane();
		container.setBackground(Color.ORANGE);
		container.setLayout(new FlowLayout());
		Action handler = new Action();
		
		text1 = new JTextField(14);
		text2 = new JTextField(14);
		labelResult = new JLabel("Result : ");
		labelResult.setForeground(Color.blue);
		labelN1 = new JLabel("Value 1 : ");
		labelN2 = new JLabel("Value 2 : ");
		labelSc = new JLabel("Value For Scintific Calculations : ");
		textSc = new JTextField(20);
		panelScVal = new JPanel();
		panelResult = new JPanel();
		panelResult.setBackground(Color.yellow);
		panelResult.add(labelResult);
		
		panel = new JPanel();
		panel.setLayout(new GridLayout(1, BNames.length));
		panel2 = new JPanel();
		panel2.setLayout(new GridLayout(1, 6));
		
		panelScButtons = new JPanel();
		panelScButtons.setLayout(new GridLayout(1, BNames2.length));
		
		buttons = new JButton[6];
		buttons2 = new JButton[11];
		panel.setBackground(Color.blue);
		for (int i=0; i<BNames.length; i++)
		{
			buttons[i] = new JButton(BNames[i]);
			//container.add(buttons[i]);
			panel.add(buttons[i]);
			buttons[i].addActionListener(handler);
		}
		
		for (int i=0; i<BNames2.length; i++)
		{
			buttons2[i] = new JButton(BNames2[i]);
			//container.add(buttons[i]);
			panelScButtons.add(buttons2[i]);
			buttons2[i].addActionListener(handler);
		}

		panel2.add(labelN1);
		panel2.add(text1);
		panel2.add(labelN2);
		panel2.add(text2);
		//panel2.add(labelResult);
		
		container.add(panel2);
		container.add(panel, BorderLayout.SOUTH);
		textSc.addActionListener(handler);
		panelScVal.add(labelSc);
		panelScVal.add(textSc);
		container.add(panelScVal, BorderLayout.SOUTH);
		container.add(panelScButtons, BorderLayout.SOUTH);
		//container.add(text1);
		container.add(panelResult, BorderLayout.SOUTH);
		
		text1.addActionListener(handler);
		text2.addActionListener(handler);
		
		setSize(700, 210);
		setVisible(true);
	
		
	}
	
	public static void main(String[] args) 
	{
			JavaScientificCalculator view = new JavaScientificCalculator();
			view.setDefaultCloseOperation(EXIT_ON_CLOSE);
	
	}
	
	private class Action implements ActionListener
	{
		public void actionPerformed(ActionEvent event)
		{
			DecimalFormat format = new DecimalFormat("0.00");
			String n1, n2;
			double num1, num2, result;
			
			try
			{
			
			if (event.getSource() == buttons[0])
			{
				num1 = Double.parseDouble(text1.getText());
				num2 = Double.parseDouble(text2.getText());
				result = num1 + num2;
				labelResult.setText("Result Is : " + result);
				
			}
			else if (event.getSource() == buttons[1])
			{
				num1 = Double.parseDouble(text1.getText());
				num2 = Double.parseDouble(text2.getText());
				result = num1 - num2;
				labelResult.setText("Result Is : " + result);
				
			}
			
			else if (event.getSource() == buttons[2])
			{
				num1 = Double.parseDouble(text1.getText());
				num2 = Double.parseDouble(text2.getText());
				result = num1 * num2;
				labelResult.setText("Result Is : " + result);
				
			}
			
			else if (event.getSource() == buttons[3])
			{
				num1 = Double.parseDouble(text1.getText());
				num2 = Double.parseDouble(text2.getText());
				result = num1 / num2;
				labelResult.setText("Result Is : " + format.format(result));
				
			}
			
			else if (event.getSource() == buttons[4])
			{
				num1 = Double.parseDouble(text1.getText());
				num2 = Double.parseDouble(text2.getText());
				result = (num1 * num2)/100;
				labelResult.setText("Result Is : " + result);
				
			}
			
			else if (event.getSource() == buttons[5])
			{
				num1 = Double.parseDouble(text1.getText());
				num2 = Double.parseDouble(text2.getText());
				result = Math.pow(num1, num2);			
				labelResult.setText("Result Is : " + format.format(result));
			}
			
			else if (event.getSource() == buttons2[0])
			{
				num1 = Double.parseDouble(textSc.getText());
				result = Math.sin(num1);			
				labelResult.setText("Result Is : " + format.format(result));
				
			}
			
			else if (event.getSource() == buttons2[1])
			{
				num1 = Double.parseDouble(textSc.getText());
				result = Math.cos(num1);			
				labelResult.setText("Result Is : " + format.format(result));
				
			}
			
			else if (event.getSource() == buttons2[2])
			{
				num1 = Double.parseDouble(textSc.getText());
				result = Math.tan(num1);
				labelResult.setText("Result Is : " + format.format(result));
				
			}
			
			else if (event.getSource() == buttons2[3])
			{
				num1 = Double.parseDouble(textSc.getText());
				result = Math.log10(num1);
				labelResult.setText("Result Is : " + format.format(result));
				
			}
			
			else if (event.getSource() == buttons2[4])
			{
				num1 = Double.parseDouble(textSc.getText());
				result = Math.log(num1);
				labelResult.setText("Result Is : " + format.format(result));
				
			}
			
			else if (event.getSource() == buttons2[5])
			{
				num1 = Double.parseDouble(textSc.getText());
				result = Math.toRadians(num1);
				labelResult.setText("Result Is : " + format.format(result));
				
			}
			
			else if (event.getSource() == buttons2[6])
			{
				num1 = Double.parseDouble(textSc.getText());
				result = Math.toDegrees(num1);
				labelResult.setText("Result Is : " + format.format(result));
				
			}
			
			else if (event.getSource() == buttons2[7])
			{
				num1 = Double.parseDouble(textSc.getText());
				result = Math.sqrt(num1); 
				labelResult.setText("Result Is : " + format.format(result));
			}
			else if (event.getSource() == buttons2[8])
			{	
				result = 1;
				int num3;
				num3 = Integer.parseInt(textSc.getText());
				for (int i=num3; i>=1; i--)
				{
					result = result * i;
				}
				labelResult.setText("Result Is : " + result);
			}
			
			}
			catch (NumberFormatException n)
			{
				JOptionPane.showMessageDialog(null, "You Must Enter Integers", "Error", JOptionPane.ERROR_MESSAGE);
			}
			
			
		}
	}
	
}