New Topic/Question
Reply
package MortgageCalculator;
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.text.DecimalFormat;
import javax.swing.*;
import java.util.*;
public class MortgageCalculator implements ActionListener
{ //field to get user input
JTextField principalTextBox;
JComboBox termsTextBox;
JScrollPane scroller;//scroller to scroll the result area
public void calculate() //Method To calculate the result
{
try {
DecimalFormat moneyFormatter = new DecimalFormat("$#,###.00"); //sets the format of output
//to hold balance
String bal = principalTextBox.getText();
if(bal.indexOf("$")==0)
bal = bal.substring(1);
double balance=0;
try {
balance = Double.parseDouble(bal); //convert text bos data to double data type
}catch(Exception e){
JOptionPane.showMessageDialog(principalTextBox, "Please provide numeric value");
return;
}
double initAmt = balance;
int months = 84; //To hold months
//array for the mortgage data for the different loans.
double interestRates[] = { 0.0535,0.05,0.0565,0.575};
int numMonths[] = {84,120,240,360};
//to hold interest
double interest = 0.0535;
//user selection
months = numMonths[termsTextBox.getSelectedIndex()];
interest = interestRates[termsTextBox.getSelectedIndex()];
//Headings for grid
String[] columnNames = {"Month","Payment","Principal Paid","Interest Paid","Total Interest","Balance"}; // Data Grid headings
Object[][] data = new Object[months][6];
//calculating monthly interest
double monthlyInterest = interest / 12.0;
double totalInterest = 0.0;
//calculating interests and moth payments
double monthlyPayment = balance * ((monthlyInterest * Math.pow(1.0 + monthlyInterest, months)) / (Math.pow(1.0 + monthlyInterest, months) - 1.0));
for (int j = 0; j < months; j++)
{
double interestThisPeriod = balance * monthlyInterest;
totalInterest = totalInterest + interestThisPeriod;
balance = balance - monthlyPayment + interestThisPeriod;
data[j][0] = ""+(j+1);
data[j][1] = moneyFormatter.format(monthlyPayment);
data[j][2] = moneyFormatter.format(monthlyPayment-interestThisPeriod);
data[j][3] = moneyFormatter.format(interestThisPeriod);
data[j][4] = moneyFormatter.format(totalInterest);
data[j][5] = moneyFormatter.format(balance);
}
//Showing result in table
JTable table = new JTable(data, columnNames);
//Adding table to scroller so that user can scroll the results
scroller.setViewportView(table);
//calculating values and creating object of JP to display chart
double total = initAmt + totalInterest;
double mortgagePercent = initAmt / total;
double interestPercent = totalInterest / total;
} catch (Exception e) {}
}
public void addComponentsToPane(Container contentPane) //All view
{
// Any number of rows and 2 columns
contentPane.setLayout(new GridBagLayout());
GridBagConstraints c = new GridBagConstraints();
//Adding controls on frame
c.fill = GridBagConstraints.HORIZONTAL;
c.gridx = 0;
c.gridy = 0;
contentPane.add(new JLabel("Principal:"), c);
c.fill = GridBagConstraints.HORIZONTAL;
c.gridx = 1;
c.gridy = 0;
principalTextBox = new JTextField();
contentPane.add(principalTextBox, c);
c.fill = GridBagConstraints.HORIZONTAL;
c.gridx = 0;
c.gridy = 1;
contentPane.add(new JLabel("Terms:"), c);
termsTextBox = new JComboBox();
Scanner fileScanner = null;
c.fill = GridBagConstraints.HORIZONTAL;
c.gridx = 1;
c.gridy = 1;
contentPane.add(termsTextBox, c);
c.fill = GridBagConstraints.HORIZONTAL;
c.gridx = 0;
c.gridy = 2;
c.gridwidth = 2;
JButton calcButton = new JButton("Calculate");
JButton reset = new JButton("Reset");
JPanel jp = new JPanel();
jp.add(calcButton);jp.add(reset);
calcButton.addActionListener(this);
JButton exit = new JButton("Exit");
jp.add(exit);
exit.addActionListener(this);
reset.addActionListener(this);
contentPane.add(jp, c);
scroller = new JScrollPane();
c.fill = GridBagConstraints.HORIZONTAL;
c.gridx = 0;
c.gridy = 3;
c.gridwidth = 2;
c.gridheight = 2;
//Showing table with values 0 on the frame
String[] columnNames = {"Month","Payment","Principal Paid","Interest Paid","Total Interest","Balance"};
Object[][] data = { {"0","0","0","0","0","0"} };
JTable table = new JTable(data, columnNames);
scroller.setViewportView(table);
contentPane.add(scroller, c);
}
public void createAndShowGUI()
{
JFrame frame = new JFrame("Mortgage Calculator");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
//Set up the content pane and components in GridLayout
addComponentsToPane(frame.getContentPane());
frame.pack();
frame.setVisible(true);
}
public static void main(String[] args)
{
final MortgageCalculator am = new MortgageCalculator ();
javax.swing.SwingUtilities.invokeLater(new Runnable()
{
@Override
public void run()
{
am.createAndShowGUI();
}
});
}
//When the use clicks Calculate buttin, this method will be invoked.
@Override
public void actionPerformed(ActionEvent e)
{
String cmd = e.getActionCommand();
if(cmd.equalsIgnoreCase("Exit"))
{
System.exit(1);
}
if(cmd.equalsIgnoreCase("Reset"))
{
principalTextBox.setText("");
String[] columnNames = {"Month","Payment","Principal Paid","Interest Paid","Total Interest","Balance"};
Object[][] data = { {"0","0","0","0","0","0"} };
JTable table = new JTable(data, columnNames);
table = new JTable(data, columnNames);
scroller.setViewportView(table);
}
calculate();
}
}
13 Replies - 528 Views - Last Post: 15 November 2011 - 10:08 PM
Rate Topic:
#1
badjervid
- New D.I.C Head
Reputation: 0
- Posts: 14
- Joined: 13-November 11
Combo box not working
Posted 15 November 2011 - 08:56 PM
Please help I can not get my interest rate list to appear in my combo box.
Is This A Good Question/Topic?
0
MultiQuoteReplies To: Combo box not working
#5
pbl
- There is nothing you can't do with a JTable
-
Reputation: 8026
- Posts: 31,157
- Joined: 06-March 08
Re: Combo box not working
Posted 15 November 2011 - 09:10 PM
don't see any reference to variable termsTextBox in that whole calculate() method 
You just don't fill it, the only reference to termsTextBox are
You just don't fill it, the only reference to termsTextBox are
JComboBox termsTextBox;
months = numMonths[termsTextBox.getSelectedIndex()];
interest = interestRates[termsTextBox.getSelectedIndex()];
termsTextBox = new JComboBox();
contentPane.add(termsTextBox, c);
Was This Post Helpful?
0
#7
pbl
- There is nothing you can't do with a JTable
-
Reputation: 8026
- Posts: 31,157
- Joined: 06-March 08
Re: Combo box not working
Posted 15 November 2011 - 09:20 PM
If you want a ComboBox to display:
choice 1
choice 2
choice 3
you'll have to
combo.addItem("choice 1");
combo.addItem("choice 2");
combo.addItem("choice 3");
so you have to build Strings out your different months and interest and add these String into your JComboBox
choice 1
choice 2
choice 3
you'll have to
combo.addItem("choice 1");
combo.addItem("choice 2");
combo.addItem("choice 3");
so you have to build Strings out your different months and interest and add these String into your JComboBox
Was This Post Helpful?
0
#8
badjervid
- New D.I.C Head
Reputation: 0
- Posts: 14
- Joined: 13-November 11
Re: Combo box not working
Posted 15 November 2011 - 09:29 PM
public class MortgageCalculator implements ActionListener
{ //field to get user input
JTextField principalTextBox;
JComboBox termsTextBox;
JScrollPane scroller;//scroller to scroll the result area
public void calculate() //Method To calculate the result
{
try {
DecimalFormat moneyFormatter = new DecimalFormat("$#,###.00"); //sets the format of output
//to hold balance
String bal = principalTextBox.getText();
if(bal.indexOf("$")==0)
bal = bal.substring(1);
double balance=0;
try {
balance = Double.parseDouble(bal); //convert text bos data to double data type
}catch(Exception e){
JOptionPane.showMessageDialog(principalTextBox, "Please provide numeric value");
return;
}
JComboBox termsTextBox;
months = numMonths[termsTextBox.getSelectedIndex()];
interest = interestRates[termsTextBox.getSelectedIndex()];
termsTextBox = new JComboBox();
contentPane.add("5.35% 7 years", c);
contentPane.add("5% 10 years", c);
contentPane.add("5.65% 15 years", c);
contentPane.add("5.75% 30 years", c);
double initAmt = balance;
int months = 84; //To hold months
//array for the mortgage data for the different loans.
double interestRates[] = { 0.0535,0.05,0.0565,0.575};
int numMonths[] = {84,120,240,360};
//to hold interest
double interest = 0.0535;
//user selection
months = numMonths[termsTextBox.getSelectedIndex()];
interest = interestRates[termsTextBox.getSelectedIndex()];
//Headings for grid
So would this be right?
Was This Post Helpful?
0
#9
pbl
- There is nothing you can't do with a JTable
-
Reputation: 8026
- Posts: 31,157
- Joined: 06-March 08
Re: Combo box not working
Posted 15 November 2011 - 09:37 PM
termsTextBox.addItem("5.35% 7 years");
but should be done in your constructor not in calculate() which
months = numMonths[termsTextBox.getSelectedIndex()];
uses this statement to determine which index of the comboBox is selected
to have an index selected, it has to have something in it
but should be done in your constructor not in calculate() which
months = numMonths[termsTextBox.getSelectedIndex()];
uses this statement to determine which index of the comboBox is selected
to have an index selected, it has to have something in it
Was This Post Helpful?
1
#10
badjervid
- New D.I.C Head
Reputation: 0
- Posts: 14
- Joined: 13-November 11
Re: Combo box not working
Posted 15 November 2011 - 09:43 PM
Where would you insert the the code?
JComboBox termsTextBox;
months = numMonths[termsTextBox.getSelectedIndex()];
interest = interestRates[termsTextBox.getSelectedIndex()];
termsTextBox = new JComboBox();
termsTextBox.addItem("5.35% 7 years");
termsTextBox.addItem("5% 10 years");
termsTextBox.addItem("5.65% 15 years");
termsTextBox.addItem("5.75% 30 years");
Was This Post Helpful?
0
#12
pbl
- There is nothing you can't do with a JTable
-
Reputation: 8026
- Posts: 31,157
- Joined: 06-March 08
Re: Combo box not working
Posted 15 November 2011 - 09:55 PM
In your addComponentToPane()
You already create the ComboBox
actually if you put
double interestRates[] = { 0.0535,0.05,0.0565,0.575};
int numMonths[] = {84,120,240,360};
in your instance variable you can write
You already create the ComboBox
actually if you put
double interestRates[] = { 0.0535,0.05,0.0565,0.575};
int numMonths[] = {84,120,240,360};
in your instance variable you can write
termsTextBox = new JComboBox();
for(int i = 0; i < interestsRates.length; i++) {
String str = String.format("%f.2%% in %d years", interestRates * 100, numMonths / 12);
termsTextBox.addItem(str);
}
c.fill = GridBagConstraints.HORIZONTAL;
c.gridx = 1;
c.gridy = 1;
contentPane.add(termsTextBox, c);
Was This Post Helpful?
0
#13
badjervid
- New D.I.C Head
Reputation: 0
- Posts: 14
- Joined: 13-November 11
Re: Combo box not working
Posted 15 November 2011 - 10:06 PM
I tried that but I am getting a lot of errors.
xception in thread "AWT-EventQueue-0" java.lang.RuntimeException: Uncompilable source code - cannot find symbol
symbol: variable interestsRates
location: class MortgageCalculator.MortgageCalculator
at MortgageCalculator.MortgageCalculator.addComponentsToPane(MortgageCalculator.java:87)
at MortgageCalculator.MortgageCalculator.createAndShowGUI(MortgageCalculator.java:149)
at MortgageCalculator.MortgageCalculator$1.run(MortgageCalculator.java:161)
at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:209)
at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:642)
at java.awt.EventQueue.access$000(EventQueue.java:
I am still getting the errors but i realize that was the wrong spot
xception in thread "AWT-EventQueue-0" java.lang.RuntimeException: Uncompilable source code - cannot find symbol
symbol: variable interestsRates
location: class MortgageCalculator.MortgageCalculator
at MortgageCalculator.MortgageCalculator.addComponentsToPane(MortgageCalculator.java:87)
at MortgageCalculator.MortgageCalculator.createAndShowGUI(MortgageCalculator.java:149)
at MortgageCalculator.MortgageCalculator$1.run(MortgageCalculator.java:161)
at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:209)
at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:642)
at java.awt.EventQueue.access$000(EventQueue.java:
package MortgageCalculator;
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.text.DecimalFormat;
import javax.swing.*;
import java.util.*;
public class MortgageCalculator implements ActionListener
{ //field to get user input
JTextField principalTextBox;
JComboBox termsTextBox;
JScrollPane scroller;//scroller to scroll the result area
public void calculate() //Method To calculate the result
{
try {
DecimalFormat moneyFormatter = new DecimalFormat("$#,###.00"); //sets the format of output
//to hold balance
String bal = principalTextBox.getText();
if(bal.indexOf("$")==0)
bal = bal.substring(1);
double balance=0;
try {
balance = Double.parseDouble(bal); //convert text bos data to double data type
}catch(Exception e){
JOptionPane.showMessageDialog(principalTextBox, "Please provide numeric value");
return;
}
double initAmt = balance;
int months = 84; //To hold months
//array for the mortgage data for the different loans.
double interestRates[] = { 0.0535,0.05,0.0565,0.575};
int numMonths[] = {84,120,240,360};
//to hold interest
double interest = 0.0535;
//user selection
months = numMonths[termsTextBox.getSelectedIndex()];
interest = interestRates[termsTextBox.getSelectedIndex()];
//Headings for grid
String[] columnNames = {"Month","Payment","Principal Paid","Interest Paid","Total Interest","Balance"}; // Data Grid headings
Object[][] data = new Object[months][6];
//calculating monthly interest
double monthlyInterest = interest / 12.0;
double totalInterest = 0.0;
//calculating interests and moth payments
double monthlyPayment = balance * ((monthlyInterest * Math.pow(1.0 + monthlyInterest, months)) / (Math.pow(1.0 + monthlyInterest, months) - 1.0));
for (int j = 0; j < months; j++)
{
double interestThisPeriod = balance * monthlyInterest;
totalInterest = totalInterest + interestThisPeriod;
balance = balance - monthlyPayment + interestThisPeriod;
data[j][0] = ""+(j+1);
data[j][1] = moneyFormatter.format(monthlyPayment);
data[j][2] = moneyFormatter.format(monthlyPayment-interestThisPeriod);
data[j][3] = moneyFormatter.format(interestThisPeriod);
data[j][4] = moneyFormatter.format(totalInterest);
data[j][5] = moneyFormatter.format(balance);
}
//Showing result in table
JTable table = new JTable(data, columnNames);
//Adding table to scroller so that user can scroll the results
scroller.setViewportView(table);
//calculating values and creating object of JP to display chart
double total = initAmt + totalInterest;
double mortgagePercent = initAmt / total;
double interestPercent = totalInterest / total;
} catch (Exception e) {}
}
public void addComponentsToPane(Container contentPane) //All view
{
// Any number of rows and 2 columns
contentPane.setLayout(new GridBagLayout());
GridBagConstraints c = new GridBagConstraints();
termsTextBox = new JComboBox();
for(int i = 0; i < interestsRates.length; i++) {
String str = String.format("%f.2%% in %d years", interestRates * 100, numMonths / 12);
termsTextBox.addItem(str);
}
//Adding controls on frame
c.fill = GridBagConstraints.HORIZONTAL;
c.gridx = 0;
c.gridy = 0;
contentPane.add(new JLabel("Principal:"), c);
c.fill = GridBagConstraints.HORIZONTAL;
c.gridx = 1;
c.gridy = 0;
principalTextBox = new JTextField();
contentPane.add(principalTextBox, c);
c.fill = GridBagConstraints.HORIZONTAL;
c.gridx = 0;
c.gridy = 1;
contentPane.add(new JLabel("Terms:"), c);
termsTextBox = new JComboBox();
Scanner fileScanner = null;
c.fill = GridBagConstraints.HORIZONTAL;
c.gridx = 1;
c.gridy = 1;
contentPane.add(termsTextBox, c);
c.fill = GridBagConstraints.HORIZONTAL;
c.gridx = 0;
c.gridy = 2;
c.gridwidth = 2;
JButton calcButton = new JButton("Calculate");
JButton reset = new JButton("Reset");
JPanel jp = new JPanel();
jp.add(calcButton);jp.add(reset);
calcButton.addActionListener(this);
JButton exit = new JButton("Exit");
jp.add(exit);
exit.addActionListener(this);
reset.addActionListener(this);
contentPane.add(jp, c);
scroller = new JScrollPane();
c.fill = GridBagConstraints.HORIZONTAL;
c.gridx = 0;
c.gridy = 3;
c.gridwidth = 2;
c.gridheight = 2;
//Showing table with values 0 on the frame
String[] columnNames = {"Month","Payment","Principal Paid","Interest Paid","Total Interest","Balance"};
Object[][] data = { {"0","0","0","0","0","0"} };
JTable table = new JTable(data, columnNames);
scroller.setViewportView(table);
contentPane.add(scroller, c);
}
public void createAndShowGUI()
{
JFrame frame = new JFrame("Mortgage Calculator");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
//Set up the content pane and components in GridLayout
addComponentsToPane(frame.getContentPane());
frame.pack();
frame.setVisible(true);
}
public static void main(String[] args)
{
final MortgageCalculator am = new MortgageCalculator ();
javax.swing.SwingUtilities.invokeLater(new Runnable()
{
@Override
public void run()
{
am.createAndShowGUI();
}
});
}
//When the use clicks Calculate buttin, this method will be invoked.
@Override
public void actionPerformed(ActionEvent e)
{
String cmd = e.getActionCommand();
if(cmd.equalsIgnoreCase("Exit"))
{
System.exit(1);
}
if(cmd.equalsIgnoreCase("Reset"))
{
principalTextBox.setText("");
String[] columnNames = {"Month","Payment","Principal Paid","Interest Paid","Total Interest","Balance"};
Object[][] data = { {"0","0","0","0","0","0"} };
JTable table = new JTable(data, columnNames);
table = new JTable(data, columnNames);
scroller.setViewportView(table);
}
calculate();
}
}
I am still getting the errors but i realize that was the wrong spot
package MortgageCalculator;
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.text.DecimalFormat;
import javax.swing.*;
import java.util.*;
public class MortgageCalculator implements ActionListener
{ //field to get user input
JTextField principalTextBox;
JComboBox termsTextBox;
JScrollPane scroller;//scroller to scroll the result area
public void calculate() //Method To calculate the result
{
try {
DecimalFormat moneyFormatter = new DecimalFormat("$#,###.00"); //sets the format of output
//to hold balance
String bal = principalTextBox.getText();
if(bal.indexOf("$")==0)
bal = bal.substring(1);
double balance=0;
try {
balance = Double.parseDouble(bal); //convert text bos data to double data type
}catch(Exception e){
JOptionPane.showMessageDialog(principalTextBox, "Please provide numeric value");
return;
}
double initAmt = balance;
int months = 84; //To hold months
//array for the mortgage data for the different loans.
double interestRates[] = { 0.0535,0.05,0.0565,0.575};
int numMonths[] = {84,120,240,360};
//to hold interest
double interest = 0.0535;
//user selection
months = numMonths[termsTextBox.getSelectedIndex()];
interest = interestRates[termsTextBox.getSelectedIndex()];
//Headings for grid
String[] columnNames = {"Month","Payment","Principal Paid","Interest Paid","Total Interest","Balance"}; // Data Grid headings
Object[][] data = new Object[months][6];
//calculating monthly interest
double monthlyInterest = interest / 12.0;
double totalInterest = 0.0;
//calculating interests and moth payments
double monthlyPayment = balance * ((monthlyInterest * Math.pow(1.0 + monthlyInterest, months)) / (Math.pow(1.0 + monthlyInterest, months) - 1.0));
for (int j = 0; j < months; j++)
{
double interestThisPeriod = balance * monthlyInterest;
totalInterest = totalInterest + interestThisPeriod;
balance = balance - monthlyPayment + interestThisPeriod;
data[j][0] = ""+(j+1);
data[j][1] = moneyFormatter.format(monthlyPayment);
data[j][2] = moneyFormatter.format(monthlyPayment-interestThisPeriod);
data[j][3] = moneyFormatter.format(interestThisPeriod);
data[j][4] = moneyFormatter.format(totalInterest);
data[j][5] = moneyFormatter.format(balance);
}
//Showing result in table
JTable table = new JTable(data, columnNames);
//Adding table to scroller so that user can scroll the results
scroller.setViewportView(table);
//calculating values and creating object of JP to display chart
double total = initAmt + totalInterest;
double mortgagePercent = initAmt / total;
double interestPercent = totalInterest / total;
} catch (Exception e) {}
}
public void addComponentsToPane(Container contentPane) //All view
{
// Any number of rows and 2 columns
contentPane.setLayout(new GridBagLayout());
GridBagConstraints c = new GridBagConstraints();
//Adding controls on frame
c.fill = GridBagConstraints.HORIZONTAL;
c.gridx = 0;
c.gridy = 0;
contentPane.add(new JLabel("Principal:"), c);
c.fill = GridBagConstraints.HORIZONTAL;
c.gridx = 1;
c.gridy = 0;
principalTextBox = new JTextField();
contentPane.add(principalTextBox, c);
c.fill = GridBagConstraints.HORIZONTAL;
c.gridx = 0;
c.gridy = 1;
contentPane.add(new JLabel("Terms:"), c);
termsTextBox = new JComboBox();
Scanner fileScanner = null;
termsTextBox = new JComboBox();
for(int i = 0; i < interestsRates.length; i++) {
String str = String.format("%f.2%% in %d years", interestRates * 100, numMonths / 12);
termsTextBox.addItem(str);
}
c.fill = GridBagConstraints.HORIZONTAL;
c.gridx = 1;
c.gridy = 1;
contentPane.add(termsTextBox, c);
c.fill = GridBagConstraints.HORIZONTAL;
c.gridx = 0;
c.gridy = 2;
c.gridwidth = 2;
JButton calcButton = new JButton("Calculate");
JButton reset = new JButton("Reset");
JPanel jp = new JPanel();
jp.add(calcButton);jp.add(reset);
calcButton.addActionListener(this);
JButton exit = new JButton("Exit");
jp.add(exit);
exit.addActionListener(this);
reset.addActionListener(this);
contentPane.add(jp, c);
scroller = new JScrollPane();
c.fill = GridBagConstraints.HORIZONTAL;
c.gridx = 0;
c.gridy = 3;
c.gridwidth = 2;
c.gridheight = 2;
//Showing table with values 0 on the frame
String[] columnNames = {"Month","Payment","Principal Paid","Interest Paid","Total Interest","Balance"};
Object[][] data = { {"0","0","0","0","0","0"} };
JTable table = new JTable(data, columnNames);
scroller.setViewportView(table);
contentPane.add(scroller, c);
}
public void createAndShowGUI()
{
JFrame frame = new JFrame("Mortgage Calculator");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
//Set up the content pane and components in GridLayout
addComponentsToPane(frame.getContentPane());
frame.pack();
frame.setVisible(true);
}
public static void main(String[] args)
{
final MortgageCalculator am = new MortgageCalculator ();
javax.swing.SwingUtilities.invokeLater(new Runnable()
{
@Override
public void run()
{
am.createAndShowGUI();
}
});
}
//When the use clicks Calculate buttin, this method will be invoked.
@Override
public void actionPerformed(ActionEvent e)
{
String cmd = e.getActionCommand();
if(cmd.equalsIgnoreCase("Exit"))
{
System.exit(1);
}
if(cmd.equalsIgnoreCase("Reset"))
{
principalTextBox.setText("");
String[] columnNames = {"Month","Payment","Principal Paid","Interest Paid","Total Interest","Balance"};
Object[][] data = { {"0","0","0","0","0","0"} };
JTable table = new JTable(data, columnNames);
table = new JTable(data, columnNames);
scroller.setViewportView(table);
}
calculate();
}
}
Was This Post Helpful?
0
#14
pbl
- There is nothing you can't do with a JTable
-
Reputation: 8026
- Posts: 31,157
- Joined: 06-March 08
Re: Combo box not working
Posted 15 November 2011 - 10:08 PM
As I said, you'll have to move your two arrays into the instance variables so all methods will see them
public class MortgageCalculator implements ActionListener
{ //field to get user input
JTextField principalTextBox;
JComboBox termsTextBox;
JScrollPane scroller;//scroller to scroll the result area
// here
//array for the mortgage data for the different loans.
double interestRates[] = { 0.0535,0.05,0.0565,0.575};
int numMonths[] = {84,120,240,360};
Was This Post Helpful?
0
Page 1 of 1
|
|
| 