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I have this program that is giving me some trouble, can anyone tell me what is wrong. This is the error i am getting trying to run program

java.lang.NoSuchMethodError: main
Exception in thread "main" Exit code: 1
There were errors

// Mortgage3.java
// Erik Voigt
// 05/17/10
// PRG220
// Instructor: David Frank
	
//import classes
import java.io.*;
import java.lang.*;
import java.text.*;

//Class Header
public class Mortgage3
{
	//Public method header
	public Mortgage3()
	{
	}

	//Get user input
	public double loanAmt() throws IOException
	{

		//Declare Method Variables
		double PrincipalIn = 0;
		String answer;
		boolean done = false;
		BufferedReader dataIn = new BufferedReader(new InputStreamReader(System.in));


		//Loop until done
					System.out.println();
			System.out.print("\t\t\tPlease Enter the Loan Amount:$");
			answer = dataIn.readLine();
			PrincipalIn = Double.parseDouble(answer);

		try
		{
			if(PrincipalIn <= 0) throw new NumberFormatException();

			else done = true;
		}

			catch(NumberFormatException nfe)
			{
				System.out.println("\t\t\tYou Have Entered An Invalid Response.");
				System.out.println();
			}

		return PrincipalIn;
	}

		//Get user input for interest rate
		public float loanRate() throws IOException
		{
			//Declare method variables
			float InterestIn = 0;
			String InterestAnswer;
			boolean done = false;
			BufferedReader dataIn = new BufferedReader(new InputStreamReader(System.in));
			DecimalFormat monetary = new DecimalFormat("#,###0.00");

			//loop until done

				System.out.println();
				System.out.print("\t\t\tPlease Enter Interest Rate %:");
				InterestAnswer = dataIn.readLine();
				InterestIn = Float.parseFloat(InterestAnswer);

				//System.out.println("\t\t\tThe Interest Rate of Your Loan Is %" + percentage.format(InterstIn));

				try
				{
					if(InterestIn <=0) throw new NumberFormatException();

					else done = true;
				}

				catch(NumberFormatException nfe)
				{
					System.out.println("\t\t\tYou Have Entered An Invalid Reponse.");
					System.out.println();
				}


			return InterestIn;
	}

	//get user input for Term
	public double loanTerm() throws IOException
	{
		//Declare mehtod Variables
		double TermIn = 0;
		String TermAnswer;
		boolean done = false;
System.out.println("Please Enter the Term of the Loan in Months:");
		BufferedReader dataIn = new BufferedReader(new InputStreamReader(System.in));

		//loop until done


				TermAnswer = dataIn.readLine();
				TermIn = Double.parseDouble(TermAnswer);
			try
			{
				if(TermIn <= 0) throw new NumberFormatException();
				else done = true;
			}
			catch(NumberFormatException nfe)
			{
				System.out.println("\t\t\tYou Have Entered An Invalid Response.");
				System.out.println();
			}

		return TermIn;
	}
		//Calculation of Monthly Mortgage Payment
		public double CalcAmt(float loanRate, double loanTerm, double loanAmt)
		{
			double NP, PV;
			float IR;
			NP = loanTerm/12;
			IR = loanRate/100/12;
			PV = loanAmt;

		//Calculation Formula for the Loan
		return (PV * IR) / (1 - Math.pow(1 + IR, - NP));
		}
	
	}
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  • Latest Post Latest Post by JamesCherrill
Member Avatar for JamesCherrill

Every java program needs a "main" method. Where's yours?

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