Code issue

> Hi all,

>

> I am having a problem with my code for my class. I'm

> new to Java programing. So, I am having difficulty

> trying to figure out why my program will not compile.

You're kidding, right?

This is so far from legal Java syntax it's ridiculous. I brought this into IntelliJ and watched every line marked in red with syntax errors.

Incredible. That's all I can say.

%

duffymoa at 2007-7-8 22:14:03 >

This compiles, but it still needs work. I don't believe this is what you had in mind for the runtime behavior. - %

/*

Title: Mortgage Calculator

Programmer: Mark Jackson

Date: Januaray 21, 2007

Filename: mortgageCalculation.java

Class: POS / 407

Instructor: Raouf Benhadj

Purpose: Write a program with a GUI. Have it calculate and display

mortgage payment amount from user input. Allow for user to

clear and input new data.

*/

import javax.swing.BorderFactory;

import javax.swing.Box;

import javax.swing.BoxLayout;

import javax.swing.JButton;

import javax.swing.JFrame;

import javax.swing.JLabel;

import javax.swing.JPanel;

import javax.swing.JTextField;

import javax.swing.WindowConstants;

import java.awt.EventQueue;

import java.awt.GridLayout;

import java.awt.event.ActionEvent;

import java.awt.event.ActionListener;

import java.text.DecimalFormat;

public class mortgageCalculator extends JFrame

{

final static DecimalFormat decimal = new DecimalFormat("$0.00");

private JTextField jTextField1;

private JTextField jTextField2;

private JTextField jTextField3;

private JLabel jLabel1;

private JLabel jLabel2;

private JLabel jLabel3;

private JLabel jLabel4;

private JLabel jLabel5;

private JButton jButton1;

private JButton jButton2;

// create new form

public mortgageCalculator()

{

jTextField1 = new JTextField();

jTextField2 = new JTextField();

jTextField3 = new JTextField();

jLabel1 = new JLabel();

jLabel2 = new JLabel();

jLabel3 = new JLabel();

jLabel4 = new JLabel();

jLabel5 = new JLabel();

jButton1 = new JButton();

jButton2 = new JButton();

setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);

// make button1, the Calculate button clickable

jButton1.setText("Calculate");

jButton1.addActionListener(new java.awt.event.ActionListener()

{

public void actionPerformed(java.awt.event.ActionEvent evt)

{

jButton1ActionPerformed(evt);

}

});

jLabel1.setText("0.00");

jLabel2.setText("Monthly Payment");

jLabel3.setText("Principal");

jLabel4.setText("Term");

jLabel5.setText("Interest");

// make button2, the Clear button clickable

jButton2.setText("Clear");

jButton2.addActionListener(new ActionListener()

{

public void actionPerformed(ActionEvent evt)

{

jButton2ActionPerformed(evt);

}

});

// setting the layout

JPanel mortgagePanel = new JPanel(new GridLayout(3, 2));

mortgagePanel.add(jLabel3);

mortgagePanel.add(jTextField1);

mortgagePanel.add(jLabel5);

mortgagePanel.add(jTextField2);

mortgagePanel.add(jLabel4);

mortgagePanel.add(jTextField3);

mortgagePanel.add(jLabel1);

mortgagePanel.add(jLabel2);

// setting button layout

JPanel buttonPanel = new JPanel();

buttonPanel.setLayout(new BoxLayout(buttonPanel, BoxLayout.LINE_AXIS));

buttonPanel.setBorder(BorderFactory.createEmptyBorder(0, 10, 10, 10));

buttonPanel.add(Box.createHorizontalGlue());

buttonPanel.add(jButton1);

buttonPanel.add(jButton2);

}

// setting the function on the Clear button

private void jButton2ActionPerformed(ActionEvent evt)

{

jTextField1.setText("");

jTextField2.setText("");

jTextField3.setText("");

jLabel1.setText("0.00");

}

// setting the function of the Calculate Button

private void jButton1ActionPerformed(ActionEvent evt)

{

double field1 = Double.parseDouble(jTextField1.getText());

double field2 = Double.parseDouble(jTextField2.getText());

int field3 = Integer.parseInt(jTextField3.getText());

double sum = calcPayment(field1, field2, field3);

String formatted = decimal.format(sum);

jLabel1.setText(formatted);

}

public static void main(String args[])

{

EventQueue.invokeLater(new Runnable()

{

public void run()

{

new mortgageCalculator().setVisible(true);

}

});

}

// calculation

public double calcPayment(double interestRate, double principal, int years)

{

int months = years * 12;

double annualInterest = interestRate / 100;

double periodicInterest = annualInterest / 12;

double interestBalance = principal * periodicInterest;

double monthlyPayment = interestBalance / (1 - (1 / Math.pow((1 + periodicInterest), months)));

double principalBalance = monthlyPayment - interestBalance;

double loanBalance = principal - principalBalance;

return monthlyPayment;

}

}

duffymoa at 2007-7-8 22:14:03 >