asked on

How do I get the variable arraynum to work in my program

I can not get this program to work correctly. Please show me what I am doing wrong.

import java.awt.*;
import java.awt.event.*;
import java.applet.Applet;
import javax.swing.*;
import java.text.*;
import javax.swing.text.*;

public class MortgageCalc extends JApplet // Create Mortgage class with extended JApplets
{
JLabel label_1; // Add label for Loan Amount
JLabel label_2; // Add label for Interest Rate
JLabel label_3; // Add label for Term (years loan)
JTextField textfield_1; // Add field for Loan Amount
JTextField textfield_2; // Add field for Interest Rate
JTextField textfield_3; // Add field for Term (years loan)
JButton calculate; // Create calculate button
JLabel label_4; // Add label space for Monthly Payment Amount
JButton Start_Over; // Create Start Over button
JLabel label_5; // Add label for Monthly Payment Amount field data
JButton Quit_Program; // Create Quit button to exit program
JLabel label_6; // Add label for Quit button
JLabel label_7; // Error message label header
JLabel label_8; // Error code message
JLabel label_9; // Error message help
JLabel label_10; // Loan Amount error message
JLabel label_11; // Interest Rate error message
JLabel label_12; // Term (years) error message
JTextArea textArea; // Text Area for streaming data report
JLabel label_13; // Create Pre selected rates/terms label

static String rate1String = "7 years - 5.25%";
static String rate2String = "15 years - 5.50%";
static String rate3String = "30 years - 5.75%";

private final static String newline = "\n";
public static void main(String args[])
{
JFrame f = new JFrame("Mortgage Loan Calculator"); // Create JFrame
MortgageCalc calc = new MortgageCalc(); // Start MortgageCalc method
f.getContentPane().add(calc); // Add MortgageCalc method to JFrame Panel
calc.init();
f.pack();
f.setVisible(true);
} // End Main block
public void init()
{
       MortgageCalcLayout customLayout = new MortgageCalcLayout();
Container con = getContentPane();
con.setFont(new Font("Helvetica", Font.BOLD, 12));
con.setLayout(customLayout);
label_1 = new JLabel("Loan Amount"); // Create label called Loan Amount
con.add(label_1); // Add label to Container
label_1.setForeground(Color.yellow); // Change Foreground color yellow

label_2 = new JLabel("Interest Rate"); // Create Label called Interest Rate
con.add(label_2); // Add label to Container
label_2.setForeground(Color.yellow); // Change Foreground color yellow

label_3 = new JLabel("Term"); // Create label called Term
con.add(label_3); // Add label to Container
label_3.setForeground(Color.yellow); // Change Foreground color yellow

textfield_1 = new JTextField(""); // Initialize display for Loan Amount set to null
con.add(textfield_1); // Add TextField to Container
textfield_1.setBackground(Color.yellow); // Change Background color yellow

textfield_2 = new JTextField(""); // Initialize display for Interest Rate set to null
con.add(textfield_2); // Add TextField to Container
textfield_2.setBackground(Color.gray); // Change Background color yellow
textfield_2.setEditable(false);

textfield_3 = new JTextField(""); // Initialize display for Terms (years loan) set to null
con.add(textfield_3); // Add TextField to Container
textfield_3.setBackground(Color.gray); // Change Background color yellow
textfield_3.setEditable(false);

JButton calculate = new JButton("Calculate"); // Create button called Calculate
con.add(calculate); // Add Button to Container
calculate.setBackground(Color.red); // Change Background color red
calculate.setForeground(Color.white); // Change Foreground color white

label_4 = new JLabel("Payment"); // Create label called Payment
con.add(label_4); // Add label to Container
label_4.setForeground(Color.yellow); // Change Foreground color yellow

label_5 = new JLabel("$ ____________"); // Initialize display underline blank in monthly payment display
con.add(label_5); // Add TextField to Container
label_5.setForeground(Color.yellow); // Change Foreground color yellow

JButton Start_Over = new JButton("Start Over"); // Create Button called Start_Over
con.add(Start_Over); // Add Button to Container
Start_Over.setBackground(Color.yellow); // Change Background color yellow

JButton Quit_Program = new JButton("Quit"); // Create Button called Quit
con.add(Quit_Program); // Add Button to Container
Quit_Program.setForeground(Color.white); // Change Foreground color white
Quit_Program.setBackground(Color.red); // Change Background color red

label_7 = new JLabel(""); // Create label for text header error condition
con.add(label_7); // Add label to Container
label_7.setForeground(Color.white); // Change Foreground color white
label_7.setVisible(true); // Set Error labell visible

label_8 = new JLabel(""); // Create label for actual error code
con.add(label_8); // Add label to Container
label_8.setForeground(Color.white); // Change Foreground color white
label_8.setVisible(true); // Set Error text visible

label_9 = new JLabel(""); // Create label for error message help
con.add(label_9); // Add Error message help
label_9.setForeground(Color.white); // Change Foreground color white
label_9.setVisible(true); // Set Error help visible

label_10 = new JLabel("Input Error: Loan Amount must be 10000 - 200000"); // Create label for Loan Amount error message help
con.add(label_10); // Add Loan Amount error message help
label_10.setVisible(false); // Set Loan Amount error help visible
label_10.setForeground(Color.white); // Change Foreground color white

label_11 = new JLabel("Input Error: Interest Rate must be 1 - 25"); // Create label for Interest Ratet error message help
con.add(label_11); // Add Interest Rate error message help
label_11.setForeground(Color.white); // Change Foreground color white
label_11.setVisible(false); // Set Interest Ratet error help visible

label_12 = new JLabel("Input Error: Term Loan must be 7 - 30"); // Create label for Term (years) error message help
con.add(label_12); // Add Term (years) error message help
label_12.setForeground(Color.white); // Change Foreground color white
label_12.setVisible(false); // Set Term (years) error help visible

label_13 = new JLabel("Pre selected Rates / Terms"); // Create label for pre selected Rates / Terms
con.add(label_13); // Add label to container
label_13.setForeground(Color.yellow); // Set Foreground color to yellow

textArea = new JTextArea(5, 30); // Define text area for principal, interest, balances
textArea.setText(""); // Print heading in textAre panel
textArea.setEditable(false); // set to false so user can't change data
con.add(textArea); // Add textArea to panel

JRadioButton rate1Button = new JRadioButton(rate1String);
JRadioButton rate2Button = new JRadioButton(rate2String);
JRadioButton rate3Button = new JRadioButton(rate3String);

rate1Button.setMnemonic(KeyEvent.VK_7);
rate2Button.setMnemonic(KeyEvent.VK_1);
rate3Button.setMnemonic(KeyEvent.VK_3);

rate1Button.setActionCommand(rate1String);
rate2Button.setActionCommand(rate2String);
rate3Button.setActionCommand(rate3String);
rate1Button.setSelected(true);

ButtonGroup groupRate = new ButtonGroup(); // Group the radio buttons.
groupRate.add(rate1Button);
groupRate.add(rate2Button);
groupRate.add(rate3Button);

rate1Button.setBackground(Color.green);
rate2Button.setBackground(Color.green);
rate3Button.setBackground(Color.green);

con.add(rate1Button);
con.add(rate2Button);
con.add(rate3Button);

             rate1Button.addItemListener(new SelectItemListener());
             rate2Button.addItemListener(new SelectItemListener());
             rate3Button.addItemListener(new SelectItemListener());

// Create scroll bars for textAre
textArea.setFont(new Font("Fixedsys", Font.PLAIN,12));
JScrollPane scrollPane = new JScrollPane(textArea, JScrollPane.VERTICAL_SCROLLBAR_ALWAYS, JScrollPane.HORIZONTAL_SCROLLBAR_ALWAYS);
con.add(scrollPane); // Add scrollbars to panel

setSize(getPreferredSize());

calculate.addActionListener(new ActionListener()
{
public void actionPerformed(ActionEvent h)
{
double roundPayment = 0.0; // Initialize variables to 0
DecimalFormat numberFormat = new DecimalFormat("$#,##0.00"); // Text format for outputs
       String displayPayment = ""; // Display formatted payment
       boolean tripFlag = false; // Flag for error condition
       label_5.setText("$ ____________");
textArea.setText("Payment        Month Start Balance Interest Principal End Balance "+newline);
try
{
label_7.setVisible(false); // Toggle error label header off
label_8.setVisible(false); // Toggle error message code off
label_9.setVisible(false); // Toggle error message help off
label_10.setVisible(false); // Toggle Loan Amount error message off
label_11.setVisible(false); // Toggle Interest Rate error message off
label_12.setVisible(false); // Toggle Term (years) error message off

            NumberFormat formatMonthNum = new DecimalFormat(" 000");             // Column formatter for payment number
            NumberFormat formatpercent = new DecimalFormat(".00");                         // Percent Rate formatter for payment number
              String formatStartBalance, formatInterest, formatPrincipal, formatEndBalance, formatPayment;      // Format display for column data
double principal = Double.parseDouble(textfield_1.getText()); // Principal to finance
if ( principal < 10000.00 || principal > 200000.00)
{
                                                                                                                                                                                                                                    textfield_1.setText("0"); // Reset Loan Amount Field to 0
label_10.setVisible(true); // Toggle Loan Amount error message on
label_5.setText("$ ____________"); // Initialize Display underline blank in monthly payment display
tripFlag=true;
                                                                                                                                                                                                                              }
int arraynum = 2;                                                                    // array number used different choices of years and rate
     double ratePercent[] = { 5.35f, 5.50f, 5.75f };      // rate of loan
     double rate[] =             {       ratePercent[0]/100.00,                         ratePercent[1]/100.00,       ratePercent[2]/100.00       };      // rate in decimal format percentage
int yearsLoan[] = { 7, 15, 30 };       // Number of years for loan
int paymentsPerYear = 12;                  // Set 12 month per year constant
     int numPayments[] = { paymentsPerYear * yearsLoan[0], paymentsPerYear * yearsLoan[1], paymentsPerYear * yearsLoan[2] };      // number of payments for loan
     double effectiveAnnualRate[] =      { rate[0] / paymentsPerYear,       rate[1] / paymentsPerYear, rate[2] / paymentsPerYear            };      // variable percentage rate of loan
     double payment[] =      { principal*(effectiveAnnualRate[0] / (1 - Math.pow(1 + effectiveAnnualRate[0], -numPayments[0]))),             principal*(effectiveAnnualRate[1] / (1 - Math.pow(1 + effectiveAnnualRate[1], -numPayments[1]))),             principal*(effectiveAnnualRate[2] / (1 - Math.pow(1 + effectiveAnnualRate[2], -numPayments[2])))      }; //calculates montly payment
              int counter = 1;                                      // loop counter
       int payNumber = 0;                                // payment increment counter
double startBalance      = principal;            // starting balance for display output
            double endBalance = 0.0;                         // ending balance for display output
            double paidInterest = 0.0;                         // paid interest for display output
            double paidPrincipal = 0.0;                         // paid interest for display output
                   int startYear = 2004;                          // year to start payments
                 int payYear = startYear;                   // year counter for output column display
                   int startMonth = 9;                               // month to start first payment
                   int payMonth = startMonth;            // actual pay month for each payment
            String month = " ";                               // string format for month payment
            formatPayment = formatColumn(payment[arraynum]);

if (tripFlag==false)
{
label_5.setText(formatPayment); // Output Monthly Payment to screen
                                                                                                                                                                           }

              while (payNumber < numPayments[arraynum]) // Start main loop and exit if (q) or (Q) keys selected or last payment displayed
                     {
payNumber++;                                                                                           // Payment number in table
                       month = formatMonthDate(payMonth)+payYear;                          // Format month payment display
                       if (payMonth == 12) {payYear++; payMonth=0;}                         // If payment month is Dec start next payment in month of Jan
                                   paidInterest = ((startBalance*rate[arraynum])/12);             // Interest paid on principal balance
                         paidPrincipal = (payment[arraynum]-paidInterest);                         // Principal paid on loan
                         endBalance = (startBalance-paidPrincipal);                                     // End balance after intrerest & principal applied toward balance
                                     formatStartBalance = formatColumn(startBalance);                        // Format data for even columns
                                     formatInterest = formatColumn(paidInterest);
                                     formatPrincipal = formatColumn(paidPrincipal);
                                     formatEndBalance = formatColumn(endBalance);
     // Print a line of data from table
     textArea.append(formatMonthNum.format(payNumber)+"\t"+(month)+"\t"+formatStartBalance+"\t"+formatInterest+"\t"+formatPrincipal+"\t"+formatEndBalance+"\n\n");
payMonth++;
     if (endBalance > 0.0)                                                      // If not last payment set start balance to previous ending balance
           startBalance = endBalance;
                    }
} // End try block
catch (NumberFormatException e)
{
System.out.println("Number format error: " + e.getMessage()); // Debugging purposes to show output in DOS
label_7.setVisible(true); // Toggle error label header on
label_7.setText("Message Error:"); // Set error code title
label_8.setVisible(true); // Toggle error message code on
label_8.setText(e.getMessage()); // Set actual error code to label
label_9.setVisible(true); // Toggle error message help on
label_9.setText("Consult user manual for proper field values.");
label_5.setText("$ ____________"); // Initialize Display underline blank in monthly payment display
} // End catch block
                                      } // End actionPerformed block
}); // End calculate block

// Moved here - still does nto work
class SelectItemListener implements ItemListener
{
      public void itemStateChanged(ItemEvent e)
       {
//get object
AbstractButton sel = (AbstractButton)e.getItemSelectable();
            //checkbox select or not
            if(e.getStateChange() == ItemEvent.SELECTED)
              {
           if (sel.getText().equals("7 years - 5.25%"))
              {
System.out.println("7 year loan at 5.25% selected");
arraynum = 0;
//                                                                                                                                                                    textfield_2 = new JTextField("5.25");
//                                                                                                                                                             textfield_3 = new JTextField("7");
}
else if (sel.getText().equals("15 years - 5.50%"))
       {
System.out.println("15 year loan at 5.50% selected");
     arraynum = 1;
//                                                                                                                                                                                textfield_2 = new JTextField("5.50");
//                                                                                                                                                                                textfield_3 = new JTextField("15");
       }
else if (sel.getText().equals("30 years - 5.75%"))
       {
System.out.println("30 year loan at 5.75% selected");
arraynum = 2;
//                                                                                                                                                                                textfield_2 = new JTextField("5.75");
//                                                                                                                                                                                textfield_3 = new JTextField("30");
       }
}
}
}

Start_Over.addActionListener(new ActionListener()
{
public void actionPerformed(ActionEvent h)
{
textfield_1.setText(""); // Initialize Display to null
textfield_2.setText(""); // Initialize Display to null
textfield_3.setText(""); // Initialize Display to null
label_5.setText("$ ____________"); // Initialize Display underline blank in monthly payment display
label_7.setVisible(false); // Toggle error label header off
label_8.setVisible(false); // Toggle error message code off
label_9.setVisible(false); // Toggle error message help off
label_10.setVisible(false); // Toggle Loan Amount error message off
label_11.setVisible(false); // Toggle Interest Rate error message off
label_12.setVisible(false); // Toggle Term (years) error message off
textArea.setText("");
} // End actionPerformed block
}); // End Start_Over listener

Quit_Program.addActionListener(new ActionListener()
{
                          public void actionPerformed(ActionEvent h)
                          {
                                                                                                                                                                                                        System.exit(0); // Exit code goes here
                          } // End Quit_Program block
}); // End Quit_Program Action Listener

} // End void init block

public static String formatColumn(double floatNumber)                  // Column format method
             {
             DecimalFormat numberFormat = new DecimalFormat("$#,##0.00");
      String stringOfNum = numberFormat.format(floatNumber);
      int numLen = stringOfNum.length();
           if (numLen < 13) stringOfNum = " ".substring(numLen) + stringOfNum;
             return (stringOfNum);
      }

     public static String formatMonthDate(int payMonth)                        // Month format Method
             {
                  String month = " ";
                  switch (payMonth)
                       {
                              case 1: month = "01 JAN "; break;
                              case 2: month = "01 FEB "; break;
                              case 3: month = "01 MAR "; break;
                              case 4: month = "01 APR "; break;
                              case 5: month = "01 MAY "; break;
                              case 6: month = "01 JUN "; break;
                              case 7: month = "01 JUL "; break;
                              case 8: month = "01 AUG "; break;
                              case 9: month = "01 SEP "; break;
                              case 10: month = "01 OCT "; break;
                              case 11:      month = "01 NOV "; break;
                              case 12: month = "01 DEC "; break;
                              default: month = " ";
                    }
             return (month);
      }
} // End MortgageCalc block
class MortgageCalcLayout implements LayoutManager
{
public MortgageCalcLayout() { }
public void addLayoutComponent(String name, Component comp) { }
public void removeLayoutComponent(Component comp) { }

public Dimension preferredLayoutSize(Container parent) // Setup initial container size
{
Dimension dim = new Dimension(0, 0);
Insets insets = parent.getInsets();
dim.width = 750 + insets.left + insets.right;
dim.height = 550 + insets.top + insets.bottom;
return dim;
} // End preferredLayoutSize block

public Dimension minimumLayoutSize(Container parent) // Create minimum applet container size
{
Dimension dim = new Dimension(0, 0);
return dim;
} // End minmumLayout Size block

public void layoutContainer(Container parent) // Create Screen Layout
{
Insets insets = parent.getInsets();
Component c;
// Parameters for setBounds(int x, int y, int width, int height)
parent.setBackground(Color.blue);
c = parent.getComponent(0);
if (c.isVisible()) {c.setBounds(insets.left+8,insets.top+8,96,24);} // Loan Amount label Text
c = parent.getComponent(1);
if (c.isVisible()) {c.setBounds(insets.left+8,insets.top+40,96,24);} // Interest Rate label Text
c = parent.getComponent(2);
if (c.isVisible()) {c.setBounds(insets.left+8,insets.top+72,96,24);} // Term (Years Loan) label Text
c = parent.getComponent(3);
if (c.isVisible()) {c.setBounds(insets.left+112,insets.top+8,112,24);} // Loan Amount Container Box
c = parent.getComponent(4);
if (c.isVisible()) {c.setBounds(insets.left+112,insets.top+40,112,24);} // Interest Rate Container Box
c = parent.getComponent(5);
if (c.isVisible()) {c.setBounds(insets.left+112,insets.top+72,112,24);} // Term (Years loan) Container Box
c = parent.getComponent(6);
if (c.isVisible()) {c.setBounds(insets.left+112,insets.top+104,112,24);} // Calculate container
c = parent.getComponent(7);
if (c.isVisible()) {c.setBounds(insets.left+8,insets.top+136,96,24);} // Payment label Text
c = parent.getComponent(8);
if (c.isVisible()) {c.setBounds(insets.left+112,insets.top+136,112,24);} // Payment Monthly Amount Display
c = parent.getComponent(9);
if (c.isVisible()) {c.setBounds(insets.left+112,insets.top+175,112,24);} // Restart Button container
c = parent.getComponent(10);
if (c.isVisible()) {c.setBounds(insets.left+250,insets.top+175,112,24);} // Quit Button container
c = parent.getComponent(11);
if (c.isVisible()) {c.setBounds(insets.left+250,insets.top+136,96,24);} // Error message label header
c = parent.getComponent(12);
if (c.isVisible()) {c.setBounds(insets.left+350,insets.top+136,200,24);} // Error message code
c = parent.getComponent(13);
if (c.isVisible()) {c.setBounds(insets.left+250,insets.top+104,250,24);} // Error message help
c = parent.getComponent(14);
if (c.isVisible()) {c.setBounds(insets.left+250,insets.top+8,300,24);} // Loan Amount error message
c = parent.getComponent(15);
if (c.isVisible()) {c.setBounds(insets.left+250,insets.top+40,300,24);} // Interest Rate error message
c = parent.getComponent(16);
if (c.isVisible()) {c.setBounds(insets.left+250,insets.top+72,300,24);} // Term (years) error message

c = parent.getComponent(17);
if (c.isVisible()) {c.setBounds(insets.left+550,insets.top+8,200,24);} // Preselected Rates / Terms label title
c = parent.getComponent(18);
if (c.isVisible()) {c.setBounds(insets.left+550,insets.top+40,125,28);} // Preselected Rates / Terms rate1Button
c = parent.getComponent(19);
if (c.isVisible()) {c.setBounds(insets.left+550,insets.top+72,125,28);} // Preselected Rates / Terms rate2Button
c = parent.getComponent(20);
if (c.isVisible()) {c.setBounds(insets.left+550,insets.top+104,125,28);} // Preselected Rates / Terms rate3Button

c = parent.getComponent(21);
if (c.isVisible()) {c.setBounds(insets.left+25,insets.top+275,650,250);} // Text Area for Payment Report

} // End layoutContainer block

} // End MortgageCalct block

girionis

What exactly is the problem?

RICKPOWELL1955

ASKER

I could not get the program to pass the variable "arraynum" once the radioButton was selected because it was in a seperate class.

ASKER CERTIFIED SOLUTION

RuadRauFlessa

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RuadRauFlessa

also make it an inner class.

by defining arraynum in your outer class you should be able to address it from the inner class. You could also try static variables. Make sure though when you make use of stattic variables that you restrict the access to that specific variable.