// COBOL Programmers Swing With Java - copyright 2005 Doke, Hardgrave, & Johnson
// Chapter 5 - Computation
// Program to demonstrate methods in the Math class
// MathClassDemo.java 1 JAN 05

import java.text.NumberFormat;
public class MathClassDemo
{
    public static void main(String args[])
    {
     // declare variables
    float balance = 1000F;
    float apr = .08F;
    int months = 6;
    double payment;
    payment = (balance * (apr / 12))/ (1 - 1 / Math.pow ((1 + apr/12), months));
    float roundedPayment = roundOff(payment); // round to 2 decimals
    System.out.println ("Payment = " + payment);
    System.out.println ("Rounded Payment = " + roundedPayment);
    } // end main

    // roundOff method
    static public float roundOff (double value)
    {
	value = value * 100;                // move decimal 2 places to right
	// Math.round returns long - recast to float
	float roundedValue = (float) Math.round(value);
	roundedValue = roundedValue / 100;  // move decimal back to left
        return roundedValue;
    } // end roundOff
} // end MathClassDemo