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buildInterface code:
import javaprogramming421.PieChart2;
import java.text.*; // Used for currency display
import java.awt.*; // Used for graphical chart
import java.awt.event.*; // Also used for events
import javax.swing.*; // Used for Graphical Displays
import java.io.*; // Used for file input and output functions
// The main class for the program
public class buildInterface extends JFrame {
// Intialize Global Variables
double loanAmount, inputInterestRate, interestRate, monthlyPayment, totalPaid,
totalInterestPaid, newLoanAmount, interestPaid, totalLoanAmount, principlePaid;
int totalYears, totalMonths, paymentNumber, lineCount;
int [] definedTotalYears = {7,15,30}; // Array for Term of the loan in years
String readLine;
String [] readInterestRates = new String[3];
NumberFormat money = NumberFormat.getCurrencyInstance(); //Converts numbers to money values
// Initalize Labels, Text Fields and Buttons Variables
JLabel loanAmountLbl, interestRateLbl, monthlyPaymentLbl, totalYearsLbl,
totalPaidLbl, seperateLine, seperateLine2, blankLine, blankLine2,
viewPaymentsLbl, predefinedLoanDataLbl, totalInterestPaidLbl,
textWindowLbl, paymentsHeader, seperateLine3;
JTextField loanAmountTF, totalMonthsTF, interestRateTF, monthlyPaymentTF,
totalYearsTF, totalPaidFT, viewPaymentsTF, totalInterestPaidTF;
JButton calculateButton, clearButton, exitButton, viewPaymentsButton,
continueButton, selectButton;
JRadioButton predefined1, predefined2, predefined3;
JPanel mainPanel;
JTextArea myOutputArea;
JScrollPane myScrollBar;
public buildInterface() {
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); //Close cleanly when X is pressed.
// Setup the Labels to be used within the window
loanAmountLbl = new JLabel("Amount of the Loan: $");
totalYearsLbl = new JLabel("Length of Loan in Years: ");
interestRateLbl = new JLabel("Interest Rate Percentage: ");
monthlyPaymentLbl = new JLabel("The Total Monthly Payment Is: ");
totalInterestPaidLbl = new JLabel("Total Interest Paid: ");
totalPaidLbl = new JLabel("Final Loan amount ");
viewPaymentsLbl = new JLabel("View Monthly Payment Schedule");
seperateLine = new JLabel ("___________________________________________");
seperateLine2 = new JLabel ("___________________________________________");
seperateLine3 = new JLabel ("___________________________________________");
blankLine = new JLabel (" ");
blankLine2 = new JLabel(" ");
predefinedLoanDataLbl = new JLabel("Select Predefined Interest Rates and Terms from Below");
textWindowLbl = new JLabel("View Payment Information Below");
paymentsHeader = new JLabel(" Payment # Remaining Balance Interest Paid ");
//Declare the text fields. The (#) field defines the field size in characters
loanAmountTF = new JTextField(10);
totalMonthsTF = new JTextField(4);
interestRateTF = new JTextField(5);
monthlyPaymentTF = new JTextField(8);
totalInterestPaidTF = new JTextField(10);
totalYearsTF = new JTextField(2);
totalPaidFT = new JTextField(10);
// Define buttons with Titles to be used.
calculateButton = new JButton("Calculate");
clearButton = new JButton("Clear");
exitButton = new JButton("Exit");
selectButton = new JButton("Select Predefined Values");
viewPaymentsButton = new JButton("Payment Schedule");
// Define and Initialize Radio Buttons
predefined1 = new JRadioButton("07 Year Loan, 5.35% Interest");
predefined2 = new JRadioButton("15 Year Loan, 5.50% Interest");
predefined3 = new JRadioButton("30 Year Loan, 5.75% Interest" );
final ButtonGroup radioGroup = new ButtonGroup(); //Groups buttons together
//Add radio buttons to the group
radioGroup.add(predefined1);
radioGroup.add(predefined2);
radioGroup.add(predefined3);
//Define and setup text area for system output
myOutputArea = new JTextArea("",8,27);
myOutputArea.setLineWrap(false);
myOutputArea.setEditable(false);
//Create Text Area with a Scroll Bar
myScrollBar = new JScrollPane(myOutputArea, JScrollPane.VERTICAL_SCROLLBAR_ALWAYS, JScrollPane.HORIZONTAL_SCROLLBAR_NEVER);
// Building the window and adding the buttons, fields and labels.
mainPanel = new JPanel(); // Create the panel for the window
setSize(330, 650); // Set the size of the window
setResizable(false); // Keeps users from resizing the window (retains layout)
setLocation(750, 100); // Define the location on the screen the app starts at.
setTitle("McBride Mortgage Calculator"); // Sets the Title of the window
// Add content to the window
mainPanel.add(loanAmountLbl); // Text of the Amount of loan input
mainPanel.add(loanAmountTF); // The amount field
mainPanel.add(totalYearsLbl); // Text for the Years of loan input
mainPanel.add(totalYearsTF); // The total years field
mainPanel.add(interestRateLbl); // Text for the interest rate input
mainPanel.add(interestRateTF); // The interest rate field
mainPanel.add(monthlyPaymentLbl); // Text for the monthly payment output
mainPanel.add(monthlyPaymentTF); // Monthly payment field
monthlyPaymentTF.setEditable(false); // Prevents users from editing the field
mainPanel.add(totalInterestPaidLbl); // Text for Total Interest Paid Field
mainPanel.add(totalInterestPaidTF); // Total Interest Paid text field
totalInterestPaidTF.setEditable(false); // Make field uneditable
mainPanel.add(totalPaidLbl); // Label of Total Paid on Loan
mainPanel.add(totalPaidFT); // Text Field for the total loan cost.
totalPaidFT.setEditable(false); // Prevents users from editing ther field
mainPanel.add(blankLine); // Add a line between the textField and Buttons areas
mainPanel.add(calculateButton); // Adds the Calculate button
mainPanel.add(clearButton); // Adds the clear fields button
mainPanel.add(exitButton); // Adds the exit button
mainPanel.add(seperateLine); // Adds a seperation line (temporary)
mainPanel.add(predefinedLoanDataLbl); // Adds a text label above the radio buttons
mainPanel.add(predefined1); // Displays the RadioButton for 7 year load data
mainPanel.add(predefined2); // Displays the RadioButton for 15 year load data
mainPanel.add(predefined3); // Displays the RadioButton for 30 year load data
mainPanel.add(selectButton); // Button to view loan payment schedual
mainPanel.add(seperateLine2); // Add another speration line
mainPanel.add(viewPaymentsLbl); // Text for the View Payments option
mainPanel.add(viewPaymentsButton); // Add the view payments button
mainPanel.add(paymentsHeader); // Text for the text output area
mainPanel.add(myScrollBar); // Add the text area with a scroll bar
//mainPanel.add(seperateLine3);
//Graph needs to show up here
mainPanel.setBorder(javax.swing.BorderFactory.createBevelBorder(javax.swing.border.BevelBorder.LOWERED)); //Nifty border
add(mainPanel); // Create the actual Window
setVisible(true); // Allows window to be seen
// Initalize Listeners for Buttons
exitButton.addActionListener(new exitListener());
clearButton.addActionListener(new clearListener());
calculateButton.addActionListener(new calculateListener());
selectButton.addActionListener(new selectListener());
viewPaymentsButton.addActionListener(new viewPaymentsListener());
} // End buildInterface Contructor
//Creates a new Data File and write interest rates into it.
public class FileWrite {
BufferedWriter fileOut;
public FileWrite(){
try {
fileOut = new BufferedWriter(new FileWriter("interestRates.txt"));
fileOut.newLine(); //Starts a new line
fileOut.write("5.35"); //Write out interestRate 1 to the file
fileOut.newLine(); //Starts a new line
fileOut.write("5.5"); //Write out interestRate 2 to the file
fileOut.newLine(); //Starts a new line
fileOut.write("5.75"); //Write out interestRate 3 to the file
fileOut.newLine(); //Starts a new line
fileOut.flush();
fileOut.close(); //flushes and closes the stream
} // End Write Out
catch(IOException e){
JOptionPane.showMessageDialog(null, "Error Writing to File" + e);
} // End Error Catching
}// End Method
}// End Class
FileWrite File = new FileWrite(); // Create the Acuall File
/********************* Begin Current Button Actions ***************************/
// ActionListener for the Exit Button being pressed. Exits the Program
public class exitListener implements ActionListener {
public void actionPerformed(ActionEvent e) {
if (e.getSource() == exitButton) {
System.exit(0);
} // End if exitButton was Pressed
} //End Method
} // End Class
// ActionListener for the Clear Button Clear text fields and reset variables
public class clearListener implements ActionListener {
public void actionPerformed(ActionEvent e) {
if (e.getSource() == clearButton) {
loanAmountTF.setText("");
interestRateTF.setText("");
totalYearsTF.setText("");
monthlyPaymentTF.setText("");
totalInterestPaidTF.setText("");
totalPaidFT.setText("");
interestRateTF.setEditable(true);
totalYearsTF.setEditable(true);
myOutputArea.setText("");
} // End if clearButton was Pressed. All Text Fields are Cleared
} // End Method
} // End Class
//Action Listeners for the select button and radio selections
public class selectListener implements ActionListener {
public void actionPerformed(ActionEvent e) {
if (e.getSource() == selectButton) {
// Read the Data file interestRates.txt and load the values into
//the readInterestRates Array
try {
File dataFile = new File("interestRates.txt");
BufferedReader in = new BufferedReader(new FileReader(dataFile));
while ((readLine = in.readLine()) != null) {
for (int i = 0; i < readInterestRates.length; i++){
readInterestRates[i] = in.readLine();
}
}
}
catch(IOException erf){
JOptionPane.showMessageDialog(null, "Error Reading File" + erf);
}
interestRateTF.setEditable(false);
totalYearsTF.setEditable(false);
if(predefined1.isSelected()){
String loan1TY = Integer.toString(definedTotalYears [0]);
interestRateTF.setText(readInterestRates [0]);
totalYearsTF.setText(loan1TY);
}
if(predefined2.isSelected()){
String loan2TY = Integer.toString(definedTotalYears [1]);
interestRateTF.setText(readInterestRates [1]);
totalYearsTF.setText(loan2TY);
}
if(predefined3.isSelected()){
String loan3TY = Integer.toString(definedTotalYears [2]);
interestRateTF.setText(readInterestRates [2]);
totalYearsTF.setText(loan3TY);
}
} // End if selectButton was Pressed
} //End Method
} // End Class
//ActionListener for the Calculate Button being pressed. Gets Data and Calculates Monthly Payment
public class calculateListener implements ActionListener {
public void actionPerformed(ActionEvent e) {
if (e.getSource() == calculateButton) {
/*** Get input for the Loan Amount ***/
try {
// Get string loan amount and covert it into a number
loanAmount = Double.parseDouble(loanAmountTF.getText());
} //Verify Loan Amount input is numeric
catch (NumberFormatException n) {
JOptionPane.showMessageDialog(null, "Invalid number... Please Re-Enter Loan Amount");
loanAmountTF.setText("");
return;
}
//Verify Loan amount is not 0
if (loanAmount < 1) {
JOptionPane.showMessageDialog(null, "Invalid Input... Loan Amount must be greater than 0!"
+ "\n Please Do Not include Comas or Dollar signs");
loanAmountTF.setText("");
}
/*** Get input for the length of the loan in years ***/
try {
// Get string number of years and convert it into a number
totalYears = Integer.parseInt(totalYearsTF.getText());
} //Verify Loan Length input is numeric
catch (NumberFormatException n) {
JOptionPane.showMessageDialog(null, "Invalid number... Please Re-Enter the Number of Years");
totalYearsTF.setText("");
return;
}
// Test if Value is less than 1
if (totalYears < 1) {
JOptionPane.showMessageDialog(null, "Invalid Input... Years of Loan must be greater than 0!");
totalYearsTF.setText("");
}
/*** Get Input for Interest Rate ***/
try {
// Get Interest Rate and convert it into a Number
inputInterestRate = Double.parseDouble(interestRateTF.getText());
}
//Verify Interest Rate input is numeric
catch (NumberFormatException n) {
JOptionPane.showMessageDialog(null, "Invalid number... Please Re-Enter Interest Rate");
interestRateTF.setText("");
return;
}
// Test if Value is less than 1
if (inputInterestRate < 1) {
JOptionPane.showMessageDialog(null, "Invalid Input... Interest Rate must be greater than 0!");
interestRateTF.setText("");
}
// Do the Math and Output the Results For User Inputted Values
totalMonths = totalYears * 12; // Calculate total months of the loan term
interestRate = inputInterestRate / (12 * 100); // Get the monthly interest rate
// Calculate Monthly Payment, Loan Total Amount and Total Interest Paid
monthlyPayment = loanAmount * (interestRate / (1 - Math.pow(1 + interestRate, -totalMonths)));
totalPaid = (monthlyPayment * totalMonths); //Calculates total amount that will be paid on the loan
totalInterestPaid = (monthlyPayment * totalMonths) - loanAmount; //Calulates total interest paid.
// Display Output //
monthlyPaymentTF.setText("" + money.format(monthlyPayment)); //Display monthly payment
totalInterestPaidTF.setText("" + money.format(totalInterestPaid)); //Display total interest paid
totalPaidFT.setText("" + money.format(totalPaid)); // Display total loan cost
new PieChart2();
} //End if calculateButton was pressed
} // End Method
} //End Class
// Begin Graph Code
//Action Listener for view payment button
public class viewPaymentsListener implements ActionListener {
public void actionPerformed(ActionEvent e) {
newLoanAmount = loanAmount; // Set Initial New Loan Amount
if (e.getSource() == viewPaymentsButton) { // Begin If Pressed Loop
paymentNumber = 0; // Set Payment Counter
while (totalMonths > 0) { // Begin Displying Values Loop
interestPaid = newLoanAmount * interestRate; // Seperate interest from monthly payment
principlePaid = monthlyPayment - interestPaid; // Seperate principle from monthly payment
newLoanAmount = newLoanAmount - principlePaid; // Redefine value for newLoanAount
paymentNumber++; // Increase payment number for display
totalMonths--; // Decrease Months as payments are made
//Output loans Current Ballance and Interest Paid
myOutputArea.append(" " + paymentNumber + " "
+ money.format(newLoanAmount) + " "
+ money.format(interestPaid) + "\n\r");
} //End Display Loop
} //End If Pressed Loop
} // End Method
} // End Class
/************************* Start Up the Program *******************************/
public static void main(String[] args) {
new buildInterface(); //Starts the calculator
//new PieChart2();
} // End of Main Method
} // End buildInterface Class
/*******************************************************************************
PieChart2 Code
package javaprogramming421;
import java.awt.*;
import javax.swing.*;
public class PieChart2 extends JFrame {
JPanel panel2 = new JPanel(new BorderLayout());
JTabbedPane jTabbedPane = new JTabbedPane();
double graphLoanAmount, graphInterestPaid;
public PieChart2() {
setSize(330, 230); // set window title and size
setLocation(750, 750);
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
Container pane = getContentPane();
pane.add(jTabbedPane, BorderLayout.CENTER);
JPanel panel = new JPanel(new FlowLayout());
ChartPanel chart = new ChartPanel(); // Add chartPanel to this panel
panel2.add(chart, BorderLayout.CENTER);
jTabbedPane.addTab(null, panel2);
setVisible(true);
}
// Create an instance of our JFrame
public static void main(String args[]) {
PieChart2 pie = new PieChart2();
}
}
class ChartPanel extends JPanel {
public void paintComponent(Graphics g) {
super.paintComponent(g);
g.setColor(Color.yellow);
g.fillArc (80,15,150,150,0,180);
g.setColor(Color.blue);
g.fillArc(80,15,150,150,180,180);
}
}
Also if there is a somewhat easy way to move the chart display from the seperate window into the same JPanel use for the calculator, I could use some help there.
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