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original post:
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I am doing this calculator I have added and deleted and still get 11 errors can someone look at this and please help.
import java.text.*;
import java.math.*;
import java.io.*;
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import java.lang.String;
public class Main {
/**
* @param args the command line arguments
*/
public class MortgageCalculator5 {
}
public static void main(String[] args) {
JFrame window = new MortCalculGUI();
window.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
window.setVisible(true);
}
}
class MortCalcu5GUI extends JFrame implements ActionListener {
// Declare GUI function variables
protected JButton bCalc7, bCalc15, bCalc30, bClear, bExit;
protected JLabel labelPayment, labelLoanAmount, labelTitle, labelInstructions, labelAmortTable;
protected JTextField feildPayment, fieldLoanAmount;
protected JTextArea areaAmortTable;
//Declare variables and loan array and initialize with values
double InterestPaid, PrinciplePaid, Balance, monthlyPay, loanAmount;
int[] loanTerm = {7, 15, 30}; //loan term for 7 years, 15 years, and 30 years
double[] intRate = {5.35, 5.50, 5.75};//interest rates for 7 years, 15 years, and 30 years
double loanAmt = loanAmount;
public void actionPerformed (ActionEvent e) {
//Perform actions based upon which button is pressed (provides looping function)
if ("Calculate7".equals(e.getActionCommand())) {
DecimalFormat decimalPlaces = new DecimalFormat ("0.00");
NumberFormat currency = NumberFormat.getCurrencyInstance();
double paymentAmount = CalculatePayment7();
fieldPayment.setText ("" + (currency.format(paymentAmount)));
areaAmortTable.append("Payment # \t Remaining Balance \t Interest Pain\n");
loanAmt = Double.parseDouble (fieldLoanAmount.getText());
for (int x = 1; x<=(loanTerm[0]*12); x++)//Loop through all monthly payments for each loan
{
Balance = loanAmt;//Set Balance to Loan Amount
//Calculations on monthly payment
InterestPaid = (((intRate[0]/100.0)/12.0)*Balance);//Monthly Interest paid
PrinciplePaid = (paymentAmount-InterestPaid);//Applied toward principle
loanAmt = (Balance-PrinciplePaid);//loan balance after payment
areaAmortTable.append (x + "\t" + currency.format (loanAmt) + " \t\t" + currency.format(InterestPaid) +"n");
}
if (Balance <= 0)//ending statement, balance at $0.00
{
areaAmortTable.append ("\tRemaining balance = $0.00");
//paymentNumber = 0;
//InterestedPaid = 0.0;
}
}
else if ("Calculate15".equals(e.getActionCommand()))
{
DecimalFormat decimalPlaces = new DecimalFormat ("0.00");
NumberFormat currency = NumberFormat.getCurrencyInstance();
double paymentAmount = CalculatePayment15();
fieldPayment.setText ("" + (currency.format(paymentAmount)));
areaAmortTable.append ("Payment # \t Remaining Balance \t Interest Paid\n");
loanAmt = Double.parseDouble(fieldLoanAmount.getText());
for (int x = 1; x<=(loanTerm[1]*12); x++)//Loop through all monthly payment for each loan
{
Balance = loanAmt;
//Calculation on monthly payment
InterestPaid = ((intRate[1]/100/12)*Balance);//Monthly Interest paid
PrinciplePaid = (paymentAmount-InterestPaid);//Applied toward principle
loanAmt = ((Balance-PrinciplePaid));//loan balance after payment
areaAmortTable.append (x + '\t' + currency.format (loanAmt) + "\t\t" + currency.format (InterestPaid)+ '\n');
}
if (loanAmt <= 0)//ending statement, blance at $0.00
{
areaAmortTable.append ("\tRemaining balance = $0.00");
//paymentNumber =0;
//InterestPaid = 0.0;
}
}
else if ("calculate30".equals(e.getActionCommand()))
{
DecimalFormat decimalPlaces = new DecimalFormat("0.00");
NumberFormat currency = NumberFormat.getCurrencyInstance();
double paymentAmount = CalculatePayment30();
fieldPayment.setText ("" + (currency.format (paymentAmount)));
areaAmortTable.append ("payment # \t Remaining Balance \t Interest Paid\n");
loanAmt = Double.parseDouble (fieldLoanAmount.getText());
for (int x = 1; x<=(loanTerm[2]*12); x++)//Loop through all monthly payments for each loan
{
Balance = loanAmt;
//Calulations on monthly payments
InterestPaid = ((intRate[2]/100/12)*Balance);//Monthly Interest Paid
PrinciplePaid = (paymentAmount-InterestPaid);//Applied toward principle
areaAmortTable.append (x + "\t" + currency.format(loanAmt) + "\t\t" + currency.format(InterestPaid)+"\n");
}
if (loanAmt <= 0)//ending statement, balance at $0.00
{
areaAmortTable.append ("\tRemaining balance = $0.00");
//paymentNumber = 0;
//InterstPaid =0.0;
}
}
else if ("Clear".equals(e.getActionCommand()))
{
ClearFields();
}
else
{
//end and close application
System.exit(0);
}
}
public double CalculatePayment7 ()
{
//Check for numeric input
try
{
//Perform payment calculations if input is valid
fieldPayment.setText ("");
double Payment = (loanAmount()* (intRate[0]/100/12)) / (1- Math.pow(1/(1 + (intRate[0]/100/12)), loanTerm[0]*12));
return Payment;
}
catch (NumberFormatException event)
{
//Display error message if input is invalid
JOptionPane.showMessageDialog(null, "Invalid Entry!\nPlease enter only numeric values!!","ERROR",
JOptionPane.ERROR_MESSAGE);
return 0;
}
}
public double CalculationPayment15()
{
//Check for valid input
try
{
//Perform payment calculations if input is valid
fieldpayment.setText ("");
double Payment = (loanAmount( )* (intRate[1]/100/12)) / (1 - Math.pow(1/(1 +(intRate[1]/100/12)),loanTerm[1]*12));
return Payment;
}
catch (NumberFormatException event)
{
//Display erroe message if input is invalid
JOptionPane.showMessageDialog(null, "Invalid entry!\nPlease enter only numeric values!!",
"ERROR", JOptionPane.ERROR_MESSAGE);
return 0;
}
}
public double CalculatePayment30()
{
//Check for vilid numeric input
try
{
//Perform payment calculation if input in valid
fieldPayment.setText ("");
double Payment = (loanAmount()* (intRate[2]/100/12))/(1 - Math.pow (1/(1 + (intRate[2]/100/12)), loanTerm[2]*12));
return Payment;
}
catch (NumberFormatException event)
{
//Display error message if input is invalid
JOptionPane.showMessageDialog(null, "Invalid Entry!\nPlease enter only numeric values!!",
"ERROR", JOptionPane.ERROR_MESSAGE);
return 0;
}
}
public void ClearFields()
{
//Set all text to blank
fieldPayment.setText ("");
fieldLoanAmount.setText ("");
areaAmortTable.setText ("");
}
public MortCalcu5GUI ();
{
//Set up and initialize buttons for GUI
bCalc7 = new JButton ("7 Year, 5.32%");
bCalc7.setActionCommand ("Calculate7");
bCalc15 = new JButton ("15 Years, 5.50%");
bCalc15.setActionCommand ("Calculate15");
bCalc30 = new JButton ("30 Years, 5.75%");
bCalc30.setActionCommand ("Calculate30");
bClear = new JButton ("Clear All Fields");
bClear.setActionCommand ("Clear");
bExit = new JButton ("Exit Program");
bExit.setActionCommand ("Exit");
//Set up labels and field sizes for GUI
labelTitle = new JLabel ("McBride Mortgage Calculator V3.5");
labelInstructions = new JLabel ("Enter the amount of the Loan and then choose the term/rate of the loan.");
labelPayment = new JLabel ("Monthly Payment:");
labelLoanAmount = new JLabel ("Amount of Loan:");
fieldPayment = new JTextField ("", 12);
fieldLoanAmount = new JTextField ("", 10);
labelAmortTable = new JLabel ("Amortization Table");
areaAmortTable = new JTextArea (10, 300);
JScrollPane scrollPane = new JScrollPane (areaAmortTable, JScrollPane.VERTICAL_SCROLLBAR_ALWAYS,
JScrollPane.HORIZONTAL_SCROLLBAR_ALWAYS);
//Set up listerners for each button
bCalc7.addActionListener (this);
bCalc15.addActionListener (this);
bCalc30.addActionListener (this);
bClear.addActionListener (this);
bExit.addActionListener (this);
}
public double loanAmount ()
{
double loanAmount = Double.parseDouble (fieldLoanAmount.getText());
return loanAmount;
}
}
This post has been edited by Dogstopper: 24 March 2010 - 01:45 PM
MultiQuote
Read my post. Dunno what kind of help you're expecting, but we're not going to rewrite your program for you. I told you why you're getting the first error. Many times, the reason you're getting the first error listed is responsible for other errors listed, so if you fix the first, some of the others sometimes go away. So fix it, then we'll see about the others.
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