public class MortgageCalculatorwk3 extends JFrame
{
	// Variable declaration
	private JLabel jLabel1;
	private JLabel jLabel2;
	private JLabel jLabel3;
	private JLabel jLabel4;
	private JLabel jLabel5;
	private JTextField jTextField2;
	private JTextField jTextField3;
	private JTextField jTextField4;
	private JComboBox jComboBox1;
	private JTextArea jTextArea2;
	private JScrollPane jScrollPane5;
	private JButton jButton1;
	private JPanel contentPane;
	// End of variable declaration


	public MortgageCalculatorwk3()
	{
		super();
		initializeComponent();
		//
		// TODO: Add any constructor code after initializeComponent call
		//

		this.setVisible(true);
	}	

	private void initializeComponent()
	{
		jLabel1 = new JLabel();
		jLabel2 = new JLabel();
		jLabel3 = new JLabel();
		jLabel4 = new JLabel();
		jLabel5 = new JLabel();
		jTextField2 = new JTextField();
		jTextField3 = new JTextField();
		jTextField4 = new JTextField();
		jComboBox1 = new JComboBox();
		jTextArea2 = new JTextArea();
		jScrollPane5 = new JScrollPane();
		jButton1 = new JButton();
		contentPane = (JPanel)this.getContentPane();

		//
		// jLabel1
		//
		jLabel1.setText("jLoan Amount:");
		//
		// jLabel2
		//
		jLabel2.setText("jLoan Rate:");
		//
		// jLabel3
		//
		jLabel3.setText("Mortgage Payment Amount");
		//
		// jLabel4
		//
		jLabel4.setText("jLoan Balance:");
		//
		// jLabel5
		//
		jLabel5.setText("jInterest Paid for each payment over term of Loan");
		//
		// jTextField2
		//
		jTextField2.addActionListener(new ActionListener() {
			public void actionPerformed(ActionEvent e)
			{
				jTextField2_actionPerformed(e);
			}

		});
		//
		// jTextField3
		//
		jTextField3.addActionListener(new ActionListener() {
			public void actionPerformed(ActionEvent e)
			{
				jTextField3_actionPerformed(e);
			}

		});
		//
		// jTextField4
		//
		jTextField4.addActionListener(new ActionListener() {
			public void actionPerformed(ActionEvent e)
			{
				jTextField4_actionPerformed(e);
			}

		});
		//
		// jComboBox1
		//
		jComboBox1.addItem("7 Years at 5.35%");
		jComboBox1.addItem("15 Years at 5.5%");
		jComboBox1.addItem("30 Years at 5.75%");
		jComboBox1.addActionListener(new ActionListener() {
			public void actionPerformed(ActionEvent e)
			{
				jComboBox1_actionPerformed(e);
			}

		});
		//
		// jTextArea2
		//
		//
		// jScrollPane5
		//
		jScrollPane5.setViewportView(jTextArea2);
		//
		// jButton1
		//
		jButton1.setText("Clear");
		jButton1.addActionListener(new ActionListener() {
			public void actionPerformed(ActionEvent e)
			{
				jButton1_actionPerformed(e);
			}

		});
		//
		// contentPane
		//
		contentPane.setLayout(null);
		addComponent(contentPane, jLabel1, 32,21,77,18);
		addComponent(contentPane, jLabel2, 35,67,60,18);
		addComponent(contentPane, jLabel3, 33,117,143,18);
		addComponent(contentPane, jLabel4, 41,163,89,18);
		addComponent(contentPane, jLabel5, 6,206,244,18);
		addComponent(contentPane, jTextField2, 181,115,127,22);
		addComponent(contentPane, jTextField3, 188,164,100,22);
		addComponent(contentPane, jTextField4, 272,203,100,22);
		addComponent(contentPane, jComboBox1, 183,65,126,22);
		addComponent(contentPane, jScrollPane5, 180,18,124,23);
		addComponent(contentPane, jButton1, 36,240,83,28);
		//
		// MortgageCalculator
		//
		this.setTitle("MortgageCalculatorwk3 - extends JFrame");
		this.setLocation(new Point(0, 0));
		this.setSize(new Dimension(390, 300));
	}

	/** Add Component Without a Layout Manager (Absolute Positioning) */
	private void addComponent(Container container,Component c,int x,int y,int width,int height)
	{
		c.setBounds(x,y,width,height);
		container.add(c);
	}

	//
	// TODO: Add any appropriate code in the following Event Handling Methods
	//
	private void jTextField2_actionPerformed(ActionEvent e)
	{
		System.out.println("\njTextField2_actionPerformed(ActionEvent e) called.");
		// TODO: Add any handling code here

	}

	private void jTextField3_actionPerformed(ActionEvent e)
	{
		System.out.println("\njTextField3_actionPerformed(ActionEvent e) called.");
		// TODO: Add any handling code here

	}

	private void jTextField4_actionPerformed(ActionEvent e)
	{
		System.out.println("\njTextField4_actionPerformed(ActionEvent e) called.");
		// TODO: Add any handling code here

	}

	private void jComboBox1_actionPerformed(ActionEvent e)
	{
		System.out.println("\njComboBox1_actionPerformed(ActionEvent e) called.");
		
		Object o = jComboBox1.getSelectedItem();
		System.out.println(">>" + ((o==null)? "null" : o.toString()) + " is selected.");
		// TODO: Add any handling code here for the particular object being selected
		
	}

	private void jButton1_actionPerformed(ActionEvent e)
	{
		System.out.println("\njButton1_actionPerformed(ActionEvent e) called.");
		// TODO: Add any handling code here

	}

	//
	// TODO: Add any method code to meet your needs in following area
	//

import java.lang.Math.*;
import java.text.*;
import java.io.*;

public class MortgageCalculator
{

// (Main) method= displays all of the output in the program. 
 public static void main(String[] args)
{

	// I am defining all of the variables I want to use. 
	double principle = 200000;  				// Amount to be borrowed for mortgage
	int termArray[] = {84, 180, 360};			// Different loan terms in months. 
	double rateArray[] = {0.0535, 0.055, 0.0575};// Different interest rates for the loan. 
	double payment;								// Monthly payment
	double balance = 200000;					// Current balance of mortgage (fluctuates with payments made). 
	double interestPaid; 						// Amount of interest paid for monthly payments. 
	int i  = 0;									
	int i2 = 1;									
	int i3 = 1;									
	String pause; //Pause

	// Should find the size of the array. 
	int size = rateArray.length;

	// Correct Currency format(makes it easier for user to understand currency amount). 
	DecimalFormat decimalAmount = new DecimalFormat("#,##0.00");

    for (i=0; i<size; i++)
	{
	// Finds the payments. 
	payment = CalculatePayment(principle, termArray[i], rateArray[i]);
   // Shows the header.
	System.out.println("\t\t\t\t Welcome to Harout's Mortgage Calculator");
	System.out.println("\t\t\t\t Thank you for using my Mortgage program");
	System.out.println("\t\t\t\t and Don't forget to have a nice day");
	System.out.println(); //inserted a blank line to seperate and help space everything out. 
   // Should show correctly the principle term and the interest rate. 
	System.out.println();
	System.out.println("Principle Amount for Mortgage:\t$" + decimalAmount.format(principle)); 
	System.out.println("Interest Rate:\t\t" + rateArray[i] * 100 + "%");
	System.out.println("Loan Term:\t\t" + termArray[i] /  12 + " Years");
	System.out.println("Payment Amount:\t$" + decimalAmount.format(payment));
	System.out.println(); //Blank lines make it easier for the user to distinguish between everything in the Dos screen
	System.out.println(); //makes it easier to read for them. 
   // Pauses the screen before next mortgage values shown.
	System.out.println("Press ENTER to view the amount of interest paid and balance remaining for each month");
	try
	{
	BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
	pause = reader.readLine();
	}
	catch (IOException ioe) {}

	// Will Cycle through each month until remaining balance is at exactly 0 amount.
	while (balance > 0.01)
	{
	// Should find the interest for this month. 
	interestPaid = CalculateMonthlyInterest(balance, rateArray[i]);
    // Will give an accurate update of the balance. 
	balance = balance - (payment - interestPaid);
    System.out.println("Month: " + i2 + "\t Interest Rate: $" + decimalAmount.format(interestPaid) + "\tBalance Amount: $" + decimalAmount.format(balance));
	i2++;
	// Pauses the screen for every 18 months to make it easier to read(user-friendly feature).  
	if (i3 == 18)
	{
	// Pauses screen before next mortgage values shown. User Presses "Enter" key to continue on. 
	System.out.println("Press ENTER to continue"); 
	try
	{
	BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
	pause = reader.readLine();
	}
	catch (IOException ioe) {}
	i3=0;
	}
	i3++;
    }
	// Pauses screen before next mortgage values shown. User Presses "Enter" key to continue on.
	System.out.println("Press ENTER to continue");
	try
	{
	BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
	pause = reader.readLine();
	}
	catch (IOException ioe) {}

    // Should reset the balance
	balance = principle;

	// Should reset the month counter
	i2 = 1;
	}

    }

	// Method responsible for calculating payment,principle,rate,and term given. 
	public static double CalculatePayment(double principle, int term, double rate)
	{
		// Does all the calculations and returns an amount for the payment. 
		return(principle * Math.pow(1+(rate/12), term) * rate/12) / (Math.pow(1 + rate/12, term) - 1);
	}

	// Calculate the interst paid for the current payment
	public static double CalculateMonthlyInterest(double balance, double rate)
	{
		return(balance * (rate / 12)); //returns amount. 
		
	}

}