Re: Java Programing
"bet" <betty.jones43@verizon.net> wrote in message
news:1147471783.815444.31900@j73g2000cwa.googlegroups.com...
I am trying to modify this mortage program I wrote to display 3
mortgage loans for 7 years ar 5.35%, 15 years at 5.5% and 30 years at
5.75% by using an array for the different loan and displaying the
mortage payment for each loan. These are suppose to loop. Need help
here is my program I worte: I canot get it to loop.
I count at least three for loops in this code and I didn't even check for
other loops like while loops. Which one isn't working? And what do you mean
when say you can't get it to loop? Do you mean that the loop doesn't execute
at all or that it only executes once or something else altogether?
Do you understand the way the for loop works, i.e. what the different parts
of the loop control do? The reason I ask is that the first for loop looks
very dubious to me, particularly "loanPeriods=loanPeriods", so you may want
to revisit your Java textbooks to see how a loop is properly constructed.
Also, have you given any thought to trying to run this program in a
debugger? If you're using an IDE, you probably have an integrated debugger
built right in. If you step through the code, I feel sure that you can
figure out for yourself what it is doing and why it isn't working correctly.
That saves a lot of time over waiting for newsgroup replies and is more
satisfying for you too.
See what you can do with the suggestions I've given you, then come back if
you're still stuck.
--
Rhino
*/
import /*static*/ java.lang.Math.*;
import java.text.*;
class MortgageV4 //Begin class definition for class "Betty"
{
public static void main(String[]args) //Begin "MainMortage" method
{
//Declare & initalize variable
double loanPrincipal = 200000;
int loanPeriods = 360;
double loanAnnualRate = 0.0575;
double loanMonthlyRate = loanAnnualRate/12;
double loanPayment = 0;
double monthlyInterest;
double monthlyPrincipal;
int r;
double [][] arr575 = new double [400][3];
double [][] arr535 = new double [400][3];
double [][] arr55 = new double[400][3];
//Setup money formatting
//start from here
loanPeriods = 360;
loanAnnualRate = 0.0575;
loanMonthlyRate = loanAnnualRate/12;
DecimalFormat moneyFormat = new DecimalFormat(
"$###,###.00" );
//Calculate loan payment based on formula described in header
loanPayment = loanPrincipal*((loanMonthlyRate) / (1 -
Math.pow(1 + loanMonthlyRate,-1 * loanPeriods)));
//Print basic summary output
System.out.println("\nPOS-406 Assignment 3 - Loan
Calculator");
System.out.println("by Betty Jones");
System.out.println("----------------------------------------\n");
System.out.println("Loan Principal (Dollars): " +
moneyFormat.format(loanPrincipal));
System.out.println("Loan Periods (Months): " + loanPeriods);
System.out.println("Interest Rate (Annual): " +
loanAnnualRate*100 + "%");
System.out.println("Loan Payment (Monthly): " +
moneyFormat.format(loanPayment));
//2 Second Pause
//try {Thread.sleep(2000);}
//catch (InterruptedException e) { e.printStackTrace();}
r=0;
//Initialize loop to cycle through loan periods
for (loanPeriods=loanPeriods ; loanPeriods > 0 ; )
{
//Print header information
//System.out.println("\n\nPmt#\tPrincipal Due\tMonthly
Int\tMonthly Principal");
//System.out.println("----------------------------------------------------------------");
//Initialize loop to print only 30 entries at a time
for (int loopCount=0; loopCount < 30; loopCount++);
{
monthlyInterest =loanPayment*loanPrincipal *
loanMonthlyRate;
//Calculate monthly interest
monthlyPrincipal =
loanPaymentInterest-monthlyInterest;
//Calculate monthly principal
loanPrincipal = loanPrincipal + monthlyInterest -
loanPayment; //Calculate new principal by adding interest
snd deducting payment
loanPeriods--; //Decrement loanPeriods counter
System.out.println(360-loanPeriods + "\t" +
moneyFormat.format(
loanPrincipal) + "\t" + moneyFormat.format(monthlyInterest) +
"\t\t" + moneyFormat.format(monthlyPrincipal)); //Print monthly
detail
}
//2 Second Pause
// try {Thread.sleep(2000);}
// catch (InterruptedException e) {
e.printStackTrace();}
arr575[r][0] = loanPrincipal;
arr575[r][1] = monthlyInterest;
arr575[r][2] = monthlyPrincipal;
r++;
}
for (int r1 = 0; r1<360; r1++)
{
System.out.println(r1+1 + "\t");
for (int c1 = 0; c1<3; c1++)
{
System.out.println(moneyFormat.format(arr575[r1][c1]) + "\t");
}
System.out.println();
}
}
//End "main" method
}
//End class definition for class "Betty"