New to UIX : Need help in data binding
I am new to UIX. I am using jDeveloper 9.0.5.2 (ADF UIX version is 2.2.8). I need to create a simple table with one column with checkbox, one column with input field and 2 columns from database query. How should I go about it ?
I went through some tutorial but it's not helping me much. Can you point me to some examples / Tutorials which can help me to move further.
Thanks in Advance.
Sid.
Hi Sid,
you can do all that you are wanting to do using UIX and ADF but it's not as straight forward as dragging components from the data control palette. You have to write a bit of code in the source viewer in the UIX page.
Refer to this document to create an editable table:
http://www.oracle.com/technology/products/jdev/tips/jacobi/edittable/tip_adfuixtable_edit.html
also read forum post: question regarding ADF UIX editable tables
this document shows you how to do LOV's:
http://www.oracle.com/technology/products/jdev/howtos/10g/adf_uix_lov_ht/index.html
once you have the editable table working properly, you can add LOV code and other components to the selected column of the table. I suggest that you get the editable table working properly before trying to add lovs and checkboxes etc..
another simpler option would be a read-only table with a link to an edit page containing an input form (for the same data control) without navigation. the input form could be on the same page as the read-only table, or a different page.
regards,
Brenden
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One can edit the event if it has not passed the date. Events in the past can be viewed but not edited.
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I am able to get today's date by doing this:
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The part I need help on is this:
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Here is some information about dates:
There are many edible palm fruits, and one of the most widespread and favored of these is the data (Phoenix dactylifera). Dates were cultivated in ancient land from Mesopotamia to prehistoric Egypt, possibly as early as 6000 B.C. Then--as now--dates were a staple for the natives of those dry regions. Much later, Arabs spread dates around northern Africa, and dates were introduced into California by the Spaniards in 1765, around Mission San Ignacio.
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Need help in date Validation Urgent
Hi ,
We need help in Date Validation.
we have 2 Date fields on the form Start Date, End Date
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try following script;
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Hi all,
I need help, please. I am trying to satisfy a Level 1 client requirement for the ability to search for records in crawled table sources by a date and/or date range. I have performed the following steps, and did not get accurate results from Advanced searching for date. Please help me understand what I am doing wrong, and/or if there is a way to define a date search attribute without creating a LOV for a date column. (My tables have 500,00 rows.)
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Hi,
I need to print date in the following format:
Jan 21, 2007
11:23 AM 21/01/2007
21-01-2007 18:23
Now as per condition of assignment the year, month, day and hour, min, sec all are entered as separate integer values.
my code:
import java.util.*;
import java.text.*;
public class stringToDate
// Integer value of date and time variables
int day=21;
int month = 1;
int year=07;
int hour=18;
int min=23;
int sec=14;
// Converting integer value into date
public void convertIntoDate()
String strTmp= day+"/"+month+"/"+year+" "+hour+":"+min+":"+sec;
System.out.println("String: " + strTmp);
DateFormat dateFormat = new SimpleDateFormat("dd/MM/yyyy HH:mm:ss");
try
Date outDate = dateFormat.parse(strTmp);
System.out.println("Converted: " + dateFormat.format(outDate));
catch(Exception e){ System.out.println("Exception: " + e);}
public static void main(String args[]) {
stringToDate dF = new stringToDate();
dF.convertIntoDate();
}Now as per my code i am able to print in the following format:
String: 21/1/7 18:23:14
Converted: 21/01/0007 18:23:14
But if i try to print in other formats it gives me following error message:
Exception: java.text.ParseException: Unparseable date: "21/1/07"
Please help me....vinee wrote:
Hi,
I tried different output format but still i'm facing the same issue
Following the complete code and error message....
import java.util.*;
import java.text.*;
public class stringToDate
// Integer value of date and time variables
int day=21;
int month = 1;
int year=07;
int hour=18;
int min=23;
int sec=14;
// Converting integer value into date
public void convertIntoDate()
DateFormat dateFormat;
Date outDate=null;
String strTmp= day+"/"+month+"/"+year+" "+hour+":"+min+":"+sec;
System.out.println("Entered string for date: " + strTmp);
// Format 01/01/0070 15:24:14
dateFormat = new SimpleDateFormat("dd/MM/yyyy HH:mm:ss");
try
outDate = dateFormat.parse(strTmp);
System.out.println("Converted into Date(dd/MM/yyyy HH:mm:ss): " + dateFormat.format(outDate));
catch(Exception e){ System.out.println("Exception in format 1: " + e);}
// Format Jan 21, 2007
dateFormat = new SimpleDateFormat("EEE, MMM d, ''yyyy");
try
outDate = dateFormat.parse(strTmp);
System.out.println("Converted into Date(EEE, MMM d, ''yyyy): " + dateFormat.format(outDate));
catch(Exception fe)
{System.out.println("Exception in format 2: " + fe);}
public static void main(String args[]) {
stringToDate dF = new stringToDate();
dF.convertIntoDate();
}Following is the error message:
Entered string for date: 21/1/7 18:23:14
Converted into Date(dd/MM/yyyy HH:mm:ss): 21/01/0007 18:23:14
Exception in format 2: java.text.ParseException: Unparseable date: "21/1/7 18:23:14"
Now as per the above error message format one is working fine but format 2(// Format Jan 21, 2007) have some issues...kind suggest.
Edited by: vinee on Oct 2, 2008 4:23 AMPlease re-read my last reply.
Once again : see [http://java.sun.com/docs/books/tutorial/i18n/format/simpleDateFormat.html]
And your:
int year=07; // should be:
int year=2007; -
Need help pulling data from an outside file into my array. Please help =)
Hi,
I need help adapting my array to read the interest rates from an outside file. Here is my code and the outside file I wrote. Please help. Oh, the array in question is on line 259, inside of my calculation() method.
Thanks...
import javax.swing.*;
import javax.swing.event.*;
import java.awt.*;
import java.awt.event.*;
import java.text.NumberFormat;
import java.text.DecimalFormat;
import java.io.*;
import javax.swing.JOptionPane;
public class Workshop5 extends JFrame implements ActionListener
//declare gui components
//declare labels
JPanel contentPane = new JPanel();
JPanel graphPane = new JPanel();
JLabel instructionLabel = new JLabel();
JLabel amountLabel = new JLabel();
JLabel orLabel = new JLabel();
JLabel comboBoxLabel = new JLabel();
JLabel termLabel = new JLabel();
JLabel rateLabel = new JLabel();
JLabel calcLabel = new JLabel();
JLabel paymentLabel = new JLabel();
JLabel tableLabel = new JLabel();
//declare font object
Font labelFont = new Font("Tahoma", Font.PLAIN, 16);
//declare text fields
JTextField amountField = new JTextField(20);
JTextField termField = new JTextField(20);
JTextField rateField = new JTextField(20);
JTextField paymentField= new JTextField(20);
//declare combo box for loan selection
JComboBox comboBox = new JComboBox();
//declare button group and radio buttons
ButtonGroup buttonGroup = new ButtonGroup();
JRadioButton enterRadioButton = new JRadioButton("Enter amount, term, & rate", true);
JRadioButton selectRadioButton = new JRadioButton("Select a preset term/rate loan", false);
//declare button objects
JButton clearButton = new JButton();
JButton calcButton = new JButton();
JButton quitButton = new JButton();
//declare text area for amortization
JTextArea amortTextArea = new JTextArea();
JTextArea testTextArea = new JTextArea();
//declare scroll bar for amortization table
JScrollPane scrollPane = new JScrollPane(amortTextArea,ScrollPaneConstants.VERTICAL_SCROLLBAR_ALWAYS,ScrollPaneConstants.HORIZONTAL_SCROLLBAR_AS_NEEDED);
public Workshop5()
instructionLabel.setText("Choose one of the following payment calculation options:");
instructionLabel.setFont(new Font("Tahoma",Font.PLAIN,16));
//adds both buttons to button group
buttonGroup.add(enterRadioButton);
buttonGroup.add(selectRadioButton);
enterRadioButton.setFont(labelFont);
enterRadioButton.setBackground(Color.WHITE);
enterRadioButton.setContentAreaFilled(false);
enterRadioButton.addActionListener(this); //adds action listener to enter radio button
orLabel.setText("OR");
orLabel.setFont(new Font("Tahoma",Font.BOLD,18));
selectRadioButton.setFont(labelFont);
selectRadioButton.setBackground(Color.WHITE);
selectRadioButton.setContentAreaFilled(false);
selectRadioButton.addActionListener(this); //adds action listener to select radio button
amountLabel.setText("Enter mortgage amount");
amountLabel.setFont(new Font("Tahoma", Font.PLAIN,16));
amountField.requestFocusInWindow();
termLabel.setText("Enter term length in years:");
termLabel.setFont(new Font("Tahoma", Font.PLAIN,14));
rateLabel.setText("Enter interest rate:");
rateLabel.setFont(new Font("Tahoma", Font.PLAIN,14));
comboBoxLabel.setText("Select a loan:");
comboBoxLabel.setFont(new Font("Tahoma", Font.PLAIN,14));
comboBox.setBackground(new Color(255,255,255));
comboBox.setFont(new Font("Tahoma", Font.PLAIN, 14));
comboBox.setEnabled(false);
ComboBox();
calcLabel.setText("Press Calculate button to determine monthly payment.");
calcLabel.setFont(new Font("Tahoma", Font.PLAIN, 16));
calcButton.setText("Calculate");
calcButton.setFont(new Font("Tahoma", Font.BOLD, 14));
calcButton.addActionListener(this);
//define monthly payment label
paymentLabel.setText("Monthly payment:");
paymentLabel.setFont(new Font("Tahoma", Font.PLAIN, 16));
//define monthly payment text field
paymentField.setFont(new Font("Tahoma", Font.BOLD,16));
paymentField.setBackground(new Color(255,255,255));
paymentField.setEditable(false);
//define clear button
clearButton.setText("Clear");
clearButton.setFont(new Font("Tahoma", Font.BOLD,14));
clearButton.addActionListener(this);
//define quit button
quitButton.setText("Quit");
quitButton.setFont(new Font("Tahoma", Font.BOLD,14));
quitButton.addActionListener(this);
tableLabel.setText("Amoritization Table");
tableLabel.setFont(new Font("Tahoma", Font.BOLD, 16));
graphPane.setBackground(Color.WHITE);
//add components to content
getContentPane().add(contentPane);
contentPane.setLayout(null);
addComponent(contentPane, instructionLabel, 80,10,450,26);
addComponent(contentPane, enterRadioButton, 30,40,220,30);
addComponent(contentPane, orLabel, 280,40,100,30);
addComponent(contentPane, selectRadioButton, 335,40,350,30);
addComponent(contentPane, amountLabel, 100,80,220,26);
addComponent(contentPane, amountField, 300,80,150,26);
addComponent(contentPane, termLabel, 15,125,200,30);
addComponent(contentPane, termField, 195,125,125,30);
addComponent(contentPane, rateLabel, 62,160,200,30);
addComponent(contentPane, rateField, 195,165,125,30);
addComponent(contentPane, comboBoxLabel, 400,125,200,26);
addComponent(contentPane, comboBox, 400,155,150,30);
addComponent(contentPane, calcLabel, 100,200,400,30);
addComponent(contentPane, calcButton, 250,240,100,30);
addComponent(contentPane, paymentLabel, 150,285,200,30);
addComponent(contentPane, paymentField, 300,285,100,30);
addComponent(contentPane, clearButton, 100,330,100,30);
addComponent(contentPane, quitButton, 400,330,100,30);
addComponent(contentPane, tableLabel, 200,370,300,26);
addComponent(contentPane, scrollPane, 10,400,450,360);
addComponent(contentPane, graphPane, 475,400,305,360);
//add window listener to close window when user presses X
addWindowListener(new WindowAdapter()
public void windowClosing(WindowEvent e)
System.exit(0);
pack();
//method to add components
private void addComponent(Container container, Component c, int x, int y, int width, int height)
c.setBounds(x, y, width, height);
container.add(c);
//action performed method
public void actionPerformed(ActionEvent event)
Object source = event.getSource();
if (source == calcButton)
Calculate();
if (source == clearButton)
Clear();
if (source == quitButton)
Exit();
//defines active area based on user selection of mortgage calculation method
//if user chooses to enter the mortgage manually, combo box fields are inactive
if (source == enterRadioButton)
comboBox.setEnabled(false);
termField.setEnabled(true);
termField.setEditable(true);
rateField.setEnabled(true);
rateField.setEditable(true);
amountField.setText("");
amountField.requestFocusInWindow();
termField.setText("");
rateField.setText("");
paymentField.setText("");
amortTextArea.setText("");
//if user chooses to select from a preset mortgage, rate and term fields are inactive
if (source == selectRadioButton)
comboBox.setEnabled(true);
termField.setEnabled(false);
termField.setEditable(false);
rateField.setEnabled(false);
rateField.setEditable(false);
amountField.setText("");
amountField.requestFocusInWindow();
termField.setText("");
rateField.setText("");
paymentField.setText("");
amortTextArea.setText("");
}//end of action performed method
//combo box method
public void ComboBox()
String[] LoanArray = {" 7 years at 5.35 %", " 15 years at 5.50 %", " 30 years at 5.75 %"};
for (int i = 0; i < LoanArray.length; i++)
comboBox.addItem(LoanArray);
}//end combo box method
//calculation method
void Calculate()
//resets fields
paymentField.setText("");
amortTextArea.setText("");
//calculation variables
NumberFormat currency = NumberFormat.getCurrencyInstance();
int [] termArray = {7, 15, 30}; //array of years
double [] yearlyInterestArray = {5.35, 5.5, 5.75}; //array of interest
int totalMonths = 0; //total months
double Loan = 0.0; //amount of loan
double MonthlyInterest = 0.0; //monthly interest rate
double Payment = 0.0; //calculate payment
double monthlyPayment = 0.0; //calculate monthly payment
double Interest = 0.0; //variable for Interest Array input
int Term = 0; //variable for Term Array input
double NewMonthlyInterest = 0.0; //new interest amount
double NewLoan = 0.0; //new loan amount
double Reduction = 0.0; //principle reduction
//validate input
try
Loan = Double.parseDouble(amountField.getText());
catch (NumberFormatException e)
JOptionPane.showMessageDialog(null,"Invalid Entry. Please enter valid loan amount.", "Error", JOptionPane.WARNING_MESSAGE);
//resets input fields after error message
amountField.setText("");
amountField.requestFocusInWindow();
//if select button is chosen
if (selectRadioButton.isSelected())
int index = comboBox.getSelectedIndex();
Term = termArray[index];
Interest = yearlyInterestArray[index];
//if user chooses to enter mortgage information
else
if (enterRadioButton.isSelected())
//validates input
try
Term = Integer.parseInt(termField.getText());
catch (NumberFormatException e)
JOptionPane.showMessageDialog(null,"Invalid entry. Please enter valid term length in years.", "Error",JOptionPane.WARNING_MESSAGE);
//clears fields after error message
termField.setText("");
termField.requestFocusInWindow();
try
Interest = Double.parseDouble(rateField.getText());
catch (NumberFormatException e)
JOptionPane.showMessageDialog(null,"Invalid entry. Please enter valid rate (without percent symbol).","Error",JOptionPane.WARNING_MESSAGE);
//clears fields after error message
rateField.setText("");
rateField.requestFocusInWindow();
//perform calculations
if (Loan > 0)
Loan = Double.parseDouble(amountField.getText());
MonthlyInterest = (Interest / 12)/100;
totalMonths = Term * 12;
monthlyPayment = Loan * MonthlyInterest *(Math.pow((1 + MonthlyInterest), totalMonths)/(Math.pow((1 + MonthlyInterest), totalMonths)-1));
paymentField.setText("" + currency.format(monthlyPayment));
//send information to amortization text area
amortTextArea.append("Number\t");
amortTextArea.append(" Amount\t");
amortTextArea.append("Interest\t");
amortTextArea.append("Principle\t");
amortTextArea.append("Balance\n");
NewLoan = Loan;
for (int i = 1; i <= totalMonths; i++)
NewMonthlyInterest = MonthlyInterest * NewLoan;
Reduction = monthlyPayment - NewMonthlyInterest;
NewLoan = NewLoan - Reduction;
amortTextArea.append(" " + i +"\t");
amortTextArea.append(" " + currency.format(monthlyPayment) + "\t");
amortTextArea.append(" " + currency.format(NewMonthlyInterest)+ "\t");
amortTextArea.append(" " + currency.format(Reduction) + "\t");
amortTextArea.append(" " + currency.format(NewLoan) + "\n");
//resets fields if loan amount is less than zero
if((Loan <= 0 || Term <= 0 || Interest <= 0))
paymentField.setText("");
amortTextArea.setText("");
}//end calcualtion method
//clear method
void Clear()
amountField.setText("");
amountField.requestFocusInWindow();
termField.setText("");
rateField.setText("");
paymentField.setText("");
amortTextArea.setText("");
}//end of clear method
//main method
public static void main(String args[])
Workshop5 f = new Workshop5();
f.setTitle("Carol's Mortgage Calculator");
f.setBounds(200,100,800,800);
f.setResizable(false);
f.setVisible(true);
}//end of main method
//exit method
void Exit()
System.exit(0);
}//end of exit method
}//program end
My data file is called: "InterestData.dat" and only contains the following text:
5.35, 5.5, 5.75Ok, now I am getting this error message:
cannot resolve symbol method lenght()
Please help me out here, this is due tomorrow and I've been killing myself on it...
attaching program with revised code included, see beginning of calculation method line 250:
import javax.swing.*;
import javax.swing.event.*;
import java.awt.*;
import java.awt.event.* ;
import java.text.NumberFormat;
import java.text.DecimalFormat;
import java.io.*;
import javax.swing.JOptionPane;
public class Workshop5 extends JFrame implements ActionListener
//declare gui components
//declare labels
JPanel contentPane = new JPanel();
JPanel graphPane = new JPanel();
JLabel instructionLabel = new JLabel();
JLabel amountLabel = new JLabel();
JLabel orLabel = new JLabel();
JLabel comboBoxLabel = new JLabel();
JLabel termLabel = new JLabel();
JLabel rateLabel = new JLabel();
JLabel calcLabel = new JLabel();
JLabel paymentLabel = new JLabel();
JLabel tableLabel = new JLabel();
//declare font object
Font labelFont = new Font("Tahoma", Font.PLAIN, 16);
//declare text fields
JTextField amountField = new JTextField(20);
JTextField termField = new JTextField(20);
JTextField rateField = new JTextField(20);
JTextField paymentField= new JTextField(20);
//declare combo box for loan selection
JComboBox comboBox = new JComboBox();
//declare button group and radio buttons
ButtonGroup buttonGroup = new ButtonGroup();
JRadioButton enterRadioButton = new JRadioButton("Enter amount, term, & rate", true);
JRadioButton selectRadioButton = new JRadioButton("Select a preset term/rate loan", false);
//declare button objects
JButton clearButton = new JButton();
JButton calcButton = new JButton();
JButton quitButton = new JButton();
//declare text area for amortization
JTextArea amortTextArea = new JTextArea();
JTextArea testTextArea = new JTextArea();
//declare scroll bar for amortization table
JScrollPane scrollPane = new JScrollPane(amortTextArea, ScrollPaneConstants.VERTICAL_SCROLLBAR_ALWAYS,ScrollPaneConstants.HORIZONTAL_SCROLLBAR_AS_NEEDED);
public Workshop5()
instructionLabel.setText("Choose one of the following payment calculation options:");
instructionLabel.setFont(new Font("Tahoma",Font.PLAIN,16));
//adds both buttons to button group
buttonGroup.add(enterRadioButton);
buttonGroup.add (selectRadioButton);
enterRadioButton.setFont(labelFont);
enterRadioButton.setBackground(Color.WHITE);
enterRadioButton.setContentAreaFilled(false);
enterRadioButton.addActionListener(this); //adds action listener to enter radio button
orLabel.setText("OR");
orLabel.setFont(new Font("Tahoma",Font.BOLD,18));
selectRadioButton.setFont(labelFont);
selectRadioButton.setBackground(Color.WHITE);
selectRadioButton.setContentAreaFilled(false);
selectRadioButton.addActionListener (this); //adds action listener to select radio button
amountLabel.setText("Enter mortgage amount");
amountLabel.setFont(new Font("Tahoma", Font.PLAIN,16));
amountField.requestFocusInWindow();
termLabel.setText("Enter term length in years:");
termLabel.setFont(new Font("Tahoma", Font.PLAIN,14));
rateLabel.setText("Enter interest rate:");
rateLabel.setFont(new Font("Tahoma", Font.PLAIN,14));
comboBoxLabel.setText("Select a loan:");
comboBoxLabel.setFont(new Font("Tahoma", Font.PLAIN,14));
comboBox.setBackground(new Color(255,255,255));
comboBox.setFont(new Font("Tahoma", Font.PLAIN, 14));
comboBox.setEnabled(false);
ComboBox();
calcLabel.setText("Press Calculate button to determine monthly payment.");
calcLabel.setFont(new Font("Tahoma", Font.PLAIN, 16));
calcButton.setText("Calculate");
calcButton.setFont(new Font("Tahoma", Font.BOLD, 14));
calcButton.setBackground(new Color(202,255,112));
calcButton.addActionListener(this);
//define monthly payment label
paymentLabel.setText("Monthly payment:");
paymentLabel.setFont(new Font("Tahoma", Font.PLAIN, 16));
//define monthly payment text field
paymentField.setFont (new Font("Tahoma", Font.BOLD,16));
paymentField.setBackground(new Color(255,255,255));
paymentField.setEditable(false);
//define clear button
clearButton.setText("Clear");
clearButton.setFont(new Font("Tahoma", Font.BOLD,14));
clearButton.setBackground(new Color(202,255,112));
clearButton.addActionListener(this);
//define quit button
quitButton.setText("Quit");
quitButton.setFont(new Font("Tahoma", Font.BOLD,14));
quitButton.setBackground(new Color(202,255,112));
quitButton.addActionListener(this);
//define label for amortization table
tableLabel.setText ("Amoritization Table");
tableLabel.setFont(new Font("Tahoma", Font.BOLD, 16));
graphPane.setBackground(Color.WHITE);
//add components to content
getContentPane().add(contentPane);
contentPane.setLayout(null);
addComponent(contentPane, instructionLabel, 80,10,450,26);
addComponent(contentPane, enterRadioButton, 30,40,220,30);
addComponent(contentPane, orLabel, 280,40,100,30);
addComponent(contentPane, selectRadioButton, 335,40,350,30);
addComponent(contentPane, amountLabel, 100,80,220,26);
addComponent(contentPane, amountField, 300,80,150,26);
addComponent(contentPane, termLabel, 15,125,200,30);
addComponent(contentPane, termField, 195,125,125,30);
addComponent(contentPane, rateLabel, 62,160,200,30);
addComponent(contentPane, rateField, 195,165,125,30);
addComponent(contentPane, comboBoxLabel, 400,125,200,26);
addComponent(contentPane, comboBox, 400,155,150,30);
addComponent(contentPane, calcLabel, 100,200,400,30);
addComponent(contentPane, calcButton, 250,240,100,30);
addComponent(contentPane, paymentLabel, 150,285,200,30);
addComponent(contentPane, paymentField, 300,285,100,30);
addComponent(contentPane, clearButton, 100,330,100,30);
addComponent(contentPane, quitButton, 400,330,100,30);
addComponent(contentPane, tableLabel, 200,370,300,26);
addComponent(contentPane, scrollPane, 10,400,450,360);
addComponent(contentPane, graphPane, 475,400,305,360);
//add window listener to close window when user presses X
addWindowListener(new WindowAdapter()
public void windowClosing(WindowEvent e)
System.exit(0);
pack();
//method to add components
private void addComponent(Container container, Component c, int x, int y, int width, int height)
c.setBounds(x, y, width, height);
container.add(c);
//action performed method
public void actionPerformed(ActionEvent event)
Object source = event.getSource();
if (source == calcButton)
Calculate();
if (source == clearButton)
Clear();
if (source == quitButton)
Exit();
//defines active area based on user selection of mortgage calculation method
//if user chooses to enter the mortgage manually, combo box fields are inactive
if (source == enterRadioButton)
comboBox.setEnabled(false);
termField.setEnabled(true);
termField.setEditable(true);
rateField.setEnabled(true);
rateField.setEditable(true);
amountField.setText ("");
amountField.requestFocusInWindow();
termField.setText("");
rateField.setText("");
paymentField.setText ("");
amortTextArea.setText("");
//if user chooses to select from a preset mortgage, rate and term fields are inactive
if (source == selectRadioButton)
comboBox.setEnabled(true);
termField.setEnabled(false);
termField.setEditable(false);
rateField.setEnabled (false);
rateField.setEditable(false);
amountField.setText("");
amountField.requestFocusInWindow();
termField.setText ("");
rateField.setText("");
paymentField.setText("");
amortTextArea.setText("");
}//end of action performed method
//combo box method
public void ComboBox()
String[] LoanArray = {" 7 years at 5.35 %", " 15 years at 5.50 %", " 30 years at 5.75 %"};
for (int i = 0; i < LoanArray.length; i++)
comboBox.addItem(LoanArray);
}//end combo box method
//calculation method
void Calculate()
//resets fields
paymentField.setText("");
amortTextArea.setText("");
//calculation variables
NumberFormat currency = NumberFormat.getCurrencyInstance();
//declare input stream object
InputStream istream;
//create a file object to refer to the outside file
File interestData = new File("InterestFile.dat");
//assign instream to the new file object
istream = new FileInputStream(interestData);
try
StringBuffer sb = new StringBuffer();
BufferedReader in = new BufferedReader(new FileReader(interestData));
String line = "";
while((line = in.readLine()) != null)
sb.append(line);
in.close();
String fileData = sb.toString();
String[] splitData = fileData.split(", ");
double [] yearlyInterestArray = new double[splitData.length()];
for(int j = 0; j < splitData.length(); j++)
yearlyInterestArray[j] = new Double(splitData[j]).doubleValue();
catch (IOException e)
JOptionPane.showMessageDialog(null, "File does not exist." + e.getMessage());
int [] termArray = {7, 15, 30}; //array of years
double [] yearlyInterestArray = { 5.35, 5.5, 5.75}; //array of interest
int totalMonths = 0; //total months
double Loan = 0.0; //amount of loan
double MonthlyInterest = 0.0; //monthly interest rate
double Payment = 0.0; //calculate payment
double monthlyPayment = 0.0; //calculate monthly payment
double Interest = 0.0; //variable for Interest Array input
int Term = 0; //variable for Term Array input
double NewMonthlyInterest = 0.0; //new interest amount
double NewLoan = 0.0; //new loan amount
double Reduction = 0.0; //principle reduction
//validate input
try
Loan = Double.parseDouble(amountField.getText());
catch (NumberFormatException e)
JOptionPane.showMessageDialog(null,"Invalid Entry. Please enter valid loan amount.", "Error", JOptionPane.WARNING_MESSAGE);
//resets input fields after error message
amountField.setText("");
amountField.requestFocusInWindow ();
//if select button is chosen
if (selectRadioButton.isSelected())
int index = comboBox.getSelectedIndex ();
Term = termArray[index];
Interest = yearlyInterestArray[index];
//if user chooses to enter mortgage information
else
if (enterRadioButton.isSelected())
//validates input
try
Term = Integer.parseInt(termField.getText());
catch (NumberFormatException e)
JOptionPane.showMessageDialog(null,"Invalid entry. Please enter valid term length in years.", "Error",JOptionPane.WARNING_MESSAGE);
//clears fields after error message
termField.setText("");
termField.requestFocusInWindow();
try
Interest = Double.parseDouble(rateField.getText());
catch (NumberFormatException e)
JOptionPane.showMessageDialog(null,"Invalid entry. Please enter valid rate (without percent symbol).","Error",JOptionPane.WARNING_MESSAGE);
//clears fields after error message
rateField.setText("");
rateField.requestFocusInWindow();
//perform calculations
if (Loan > 0)
Loan = Double.parseDouble(amountField.getText ());
MonthlyInterest = (Interest / 12)/100;
totalMonths = Term * 12;
monthlyPayment = Loan * MonthlyInterest *(Math.pow ((1 + MonthlyInterest), totalMonths)/(Math.pow((1 + MonthlyInterest), totalMonths)-1));
paymentField.setText("" + currency.format(monthlyPayment));
//send information to amortization text area
amortTextArea.append("Number\t");
amortTextArea.append(" Amount\t");
amortTextArea.append("Interest\t");
amortTextArea.append("Principle\t");
amortTextArea.append("Balance\n");
NewLoan = Loan;
for (int i = 1; i <= totalMonths; i++)
NewMonthlyInterest = MonthlyInterest * NewLoan;
Reduction = monthlyPayment - NewMonthlyInterest;
NewLoan = NewLoan - Reduction;
amortTextArea.append(" " + i +"\t");
amortTextArea.append (" " + currency.format(monthlyPayment) + "\t");
amortTextArea.append(" " + currency.format(NewMonthlyInterest)+ "\t");
amortTextArea.append(" " + currency.format(Reduction) + "\t");
amortTextArea.append(" " + currency.format(NewLoan) + "\n");
//resets fields if loan amount is less than zero
if((Loan <= 0 || Term <= 0 || Interest <= 0))
paymentField.setText("");
amortTextArea.setText("");
}//end calcualtion method
//clear method
void Clear()
amountField.setText("");
amountField.requestFocusInWindow();
termField.setText("");
rateField.setText("");
paymentField.setText("");
amortTextArea.setText("");
}//end of clear method
//main method
public static void main(String args[])
Workshop5 f = new Workshop5();
f.setTitle("Carol's Mortgage Calculator");
f.setBounds(200,100,800,800);
f.setResizable(false);
f.setVisible(true);
}//end of main method
//exit method
void Exit()
System.exit(0);
}//end of exit method
}//program end -
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