Java Mortgage Calculator Program

[DJMASSIAH017]

Hello Everyone!
I have a homework assignment due and I am having a problem with an compiling it to get an output.
This is my first and only Java class.

Can someone please tell me what I am doing wrong?
Thanks in advance.

/*
Programmer:Steve A. Massiah
Date:01/29/09
Course:PRG/420
File: McBrideCR1.java
Requestor:Dwain Hammer
Request Description:Write the program in Java (without a graphical user interface) using a loan amount of $200,000 with an interest rate of 5.75% and a 30 year term.
Display the mortgage payment amount and then list the loan balance and interest paid for each payment over the term of the loan.
If the list would scroll off the screen, use loops to display a partial list, hesitate, and then display more of the list.

 */

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;

public class McBrideCR1 {

		    /** Creates a static mortgagecalculator */
		    public int years;//define variables
		    public double loanAmount;
		    public double interestRate;
		    public double monthlyPayment;

		    public void setYears(int inYears)//setter
		    {
		        years = inYears;
		    }//end set years

		    public int getYears()//getter
		    {
		        return years;
		    }//end get years

		    public void setLoanAmount(double inLoanAmount)//setter
		    {
		        loanAmount = inLoanAmount;
		    }//end set loanAmount

		    public double getLoanAmount()//getter
		    {
		        return loanAmount;
		    }//end get loanAmount

		    public void setInterestRate(double inInterestRate)//setter
		    {
		        interestRate = inInterestRate;
		    }//end set interestRate

		    public double getInterestRate()//getter
		    {
		        return interestRate;
		    }//end get interestrate

    public void CalcMonthlyPayment() {
        monthlyPayment = loanAmount * Math.pow(1 + interestRate / 12, years * 12) * (interestRate / 12) / (Math.pow(1 + interestRate / 12, years * 12) - 1);
    }// Divide the yearly interest rate of 5.75% by 12 to get monthly ineterst rate
    // Multiply the number of years by 12 to get the number of months
    // Formula for monthly payment: monthlyPayment = [P((1+r)^n)*r]/[(1+r^n)-1], where r and n are calculated as above.
    // This calculation is taken from the following webpage:
    //  http://www.dreamincode.net/

    public String toString() {//strings are used to store text and variables
        return "Mortgage Information" + "n" + "Loan Amount: $" + loanAmount + "n" + "Interest Rate: " + interestRate + "%" + "n" + "Term: " + (years * 12) + " months" + "n" + "Monthly Payment: $" + (Math.round(monthlyPayment * 100.00) / 100.00);//Using the round to two decimal places
    }

    public void schedule() {//print schedule and scroll
        System.out.println();
        System.out.println("Month     " + "t" + "Amount     " + "tt" + "Interest    " + "t" + "Balance    ");
        int counter = 1;
        double Balance, Interest;
        while (counter <= years * 12) {
            int scrollCounter = 0;
            while (scrollCounter < 30) {
                Balance = loanAmount * (1 + interestRate / 12) - monthlyPayment; //Calculation of Balance
                Interest = loanAmount * interestRate / 12; //Calculation of Interest
                //Now print using the round to two decimal places
                System.out.println("" + counter + "tt" + (Math.round(loanAmount * 100.00) / 100.00) + "tt" + (Math.round(Interest * 100.00) / 100.00) + "tt" + (Math.round(Balance * 100.00) / 100.00));
                loanAmount = Balance; //Set the Principal for next round to the Balance of previous month
                counter++;
                scrollCounter++;
            }
            System.out.println("Press Enter to contiune..");
            BufferedReader br = new BufferedReader(new InputStreamReader(System.in), 1);
            String str = "";
            try {
                str = br.readLine();
            } catch (IOException ioe) {
                System.out.println(ioe);
            }
        }
    }//end group
    }//closing bracket

[javaAddict]

What errors do you get and at which lines. Post the errors you get.

Also if it runs what results do you get what you were expecting?

Also the tab character is this:
\t

System.out.println("aaa\tbbbbb")

and for new line:
\n
System.out.println("aaa\nbbbbb")

Try running the above just for testing

[DJMASSIAH017]

Okay...
worked on it a little bit and now I get no errors(using Textpad/BlueJ).

Still cannot get it to run.
Now I get :
Exception in thread "main" java.lang.NoSuchMethodError: main

I am lost on this being a noob and all.

The result is supposed to be what is listed in the comments,javaAddict.

I think the professor wants them listed in columns(like a group of four).

Lemme know what you think.
Thanks for the quick response, as well.

[javaAddict]

You need to write a main method in which you will execute the code you wrote. Right now you have only a class with methods. You need to call these methods inside the main

[DJMASSIAH017]

OK...
I did what you told me and now I am getting an error on Line 93 in TextPad.

/*
    Programmer:Steve A. Massiah
    Date:01/29/09
    Course:PRG/420
    File: McBrideCR1.java
    Requestor:Dwain Hammer
    Request Description:Write the program in Java (without a graphical user interface) using a loan amount of $200,000 with an interest rate of 5.75% and a 30 year term.
    Display the mortgage payment amount and then list the loan balance and interest paid for each payment over the term of the loan.
    If the list would scroll off the screen, use loops to display a partial list, hesitate, and then display more of the list.

*/
import java.io.BufferedReader;
import java.io.InputStreamReader;


public class Main {
    public class McBrideCR1{

    /** Creates a static mortgagecalculator */

    public int years;//define variables
    public double loanAmount;
    public double interestRate;
    public double monthlyPayment;
        private BufferedReader key;

    public void setYears(int inYears)//setter
    {
        years=inYears;
    }//end set years

    public int getYears()//getter
    {
        return years;
    }//end get years

    public void setLoanAmount(double inLoanAmount)//setter
    {
        loanAmount=inLoanAmount;
    }//end set loanAmount

    public double getLoanAmount()//getter
    {
        return loanAmount;
    }//end get loanAmount

    public void setInterestRate(double inInterestRate)//setter
    {
        interestRate=inInterestRate;
    }//end set interestRate

    public double getInterestRate()//getter
    {
        return interestRate;
    }//end get interestrate

    public void CalcMonthlyPayment()
    {
        monthlyPayment=loanAmount*Math.pow(1 + interestRate/12, years*12) * (interestRate/12)/(Math.pow(1 + interestRate/12, years*12) -1);
    }//Divide the yearly interest rate of 5.75% by 12 to get monthly ineterst rate
     // Multiply the number of years by 12 to get the number of months
     // Formula for monthly payment: monthlyPayment = [P((1+r)^n)*r]/[(1+r^n)-1], where r and n are calculated as above.
     // This calculation is taken from the following webpage:
     //http://www.dreamincode.net/
    public String toString(){//strings are used to store text and variables
    return "Mortgage Information" + "n" + "Loan Amount: $" + loanAmount + "n" + "Interest Rate: " + interestRate + "%" + "n" + "Term: "
    + (years*12) + " months" + "n" + "Monthly Payment: $" + (Math.round(monthlyPayment*100.00)/100.00);//Using the round to two decimal places
}
    public void schedule(){//print schedule and scroll
        System.out.println();
        System.out.println("Month     " + "t" + "Amount     " + "tt" + "Interest    " + "t" + "Balance    ");
        int counter = 1;
        double Balance, Interest;
        while(counter <= years*12){
        int scrollCounter = 0;
        while(scrollCounter<30){
        Balance = loanAmount*(1+interestRate/12) - monthlyPayment; //Calculation of Balance
        Interest = loanAmount*interestRate/12; //Calculation of Interest
        //Now print using the round to two decimal places
        System.out.println(""+counter+"tt"+(Math.round(loanAmount*100.00)/100.00)+"tt"+(Math.round(Interest*100.00)/100.00)+"tt"+(Math.round(Balance*100.00)/100.00));
        loanAmount = Balance; //Set the Principal for next round to the Balance of previous month
        counter++;
        scrollCounter++;
        }
        System.out.println("Press Enter to contiune..");
        //BufferedReader enter key = new BufferedReader(new InputStreamReader(System.in), 1);
        String str = "";

        }//end group
    }
    }
}//closing bracket
 }
}

java:93: class interface or enum expected
1 error
Tool completed with exit code 1

I am bleary eyed.
It is 4AM here in the states.

I dunno...
Maybe I will try agian later today.

Thanks, javaAddict.

[javaAddict]

I told you to write a main method in which you will call your other methods. You wrote this:

public class Main {
public class McBrideCR1{

The above doesn't mean anything. Surely this is not the first program you wrote. Check your notes. Writing a main method is the first thing you learn.