* BasicMethodsLab.java
 *
 * Created on February 8, 2007, 9:56 AM
 *
 * To change this template, choose Tools | Template Manager
 * and open the template in the editor.
 */

package lab03;
import javax.swing.*;
public class BasicMethodsLab {
    
    public static void main( String args[] ) {
        
        String propertyCostStr;       // Value entered by user; string type
        String downPaymentStr;        // Value entered by user; string type
        String numberOfYearsStr;      // Value entered by user; string type
        String propertyStr;           // Letter entered by user; string type
        char propertyType;            // Storing the letter chosen by the user
        double propertyCost;          // The double form of the user-entered property cost
        double downPayment = 0;       // The double form of the user-entered down payment
        double loanAmount = 0;        // The calculated price of the loan amount
        double monthlyPayment;	      //The monthly loan payment
        double annualInterestRate = 7.5;  //The annual interest rate
        int response = 0;             // The user's response as to whether to continue
        int numberOfYears = 0;	  //integer form of the user-entered down payment
        
        
        // Initialize the output string to the empty string
        String outputStr = "";
        
        while (true) {
            // Read in item price from user as a string
            propertyCostStr = JOptionPane.showInputDialog("Enter property cost");
            
            // Convert from type String to type double
            propertyCost = Double.parseDouble(propertyCostStr);
            
            // Read in number ordered from user as a string
            downPaymentStr = JOptionPane.showInputDialog("Enter down payment");
            
            // Convert from type String to type double
            downPayment = Double.parseDouble(downPaymentStr);
            
            //Read in category from user as a number
            propertyStr = JOptionPane.showInputDialog("Choose the letter that best corresponds with your" +
                    "property type" +
                    "\nR Residential "
                    +"\n C Commercial \n A Argricultural");
            
            propertyType = 'R';
            propertyType = 'C';
            propertyType = 'A';
            
            // Read in number of years from user as a string
            numberOfYearsStr = JOptionPane.showInputDialog("Enter number of years for loan:");
            
            // Convert from type String to type integer
            numberOfYears = Integer.parseInt(numberOfYearsStr);
            
            // Echo print the entered values
            outputStr = outputStr + "Property Cost: " + propertyCost + ", ";
            outputStr = outputStr + "Down Payment: " + downPayment + ", ";
            
            // Calculate loan amount for the property
            loanAmount = propertyCost - downPayment;
            
            // Calculate monthly payment
            // Change the annual interest rate to a decimal (/100) and a monthly rate (/12)
            monthlyPayment = loanAmount * (annualInterestRate/1200) /
                    (1 - 1 / Math.pow(1 + (annualInterestRate/1200), numberOfYears * 12));
            
            
            // Print the monthly payment
            outputStr = outputStr + ", " + "Monthly Payment: " + monthlyPayment + "\n";
            
            //Print the number of years for the loan
            
            // Determine whether the user wants to continue the loop
            response = JOptionPane.showConfirmDialog(null, outputStr + "\nContinue?", "Confirm",
                    JOptionPane.YES_NO_OPTION,
                    JOptionPane.QUESTION_MESSAGE);
            
            if (response == JOptionPane.NO_OPTION)
                break;
        }
        
        // Display final output to the user
        JOptionPane.showMessageDialog(
                null, outputStr, "Property Loan Amounts", JOptionPane.INFORMATION_MESSAGE);
        
        System.exit( 0 );      // Terminate the program
    }
}