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Java multiple menu item with an event listener?

I have two menu items here ,one is for the student information and the another one is for the teacher information.i have added the menu for student and teacher both.
I am struck in the event listener how to add the action to the menu and menu1,suppose when the user click on menu 1 then student information should be displayed and for the menu2 the teacher information action should be performed.i am confused where to add the action listenr and perform the operation for the student and teacher.
I am new to the the event and action listner in java.kindly suggest the solution
import javax.swing.*;
import java.awt.event.*;
import java.awt.*;
import java.sql.*;
public class Searchdb extends JFrame implements ActionListener {
//Initializing Components
JLabel lb,lbd,lb1, lb2, lb3, lb5;
JTextField tf1, tf2,tf3,tf5,tfd;
JButton btn;
JMenuBar menuBar = new JMenuBar();
JMenu menu = new JMenu("Student");
JMenu menu1 = new JMenu("Teacher");
//Creating Constructor for initializing JFrame components
Searchdb() {
//Providing Title
super("Fetching Roll Information");
setJMenuBar(menuBar);
menuBar.add(menu);
menuBar.add(menu1);
lb5 = new JLabel("Roll Number:");
lb5.setBounds(20, 20, 100, 20);
tf5 = new JTextField(20);
tf5.setBounds(130, 20, 200, 20);
lbd = new JLabel("Date:");
lbd.setBounds(20, 50, 100, 20);
tfd = new JTextField(20);
tfd.setBounds(130, 50, 200, 20);
btn = new JButton("Submit");
btn.setBounds(50, 50, 100, 20);
btn.addActionListener(this);
lb = new JLabel("Fetching Student Information From Database");
lb.setBounds(30, 80, 450, 30);
lb.setForeground(Color.black);
lb.setFont(new Font("Serif", Font.PLAIN, 12));
setVisible(true);
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
setSize(500, 500);
lb1 = new JLabel("Name:");
lb1.setBounds(20, 120, 100, 20);
tf1 = new JTextField(50);
tf1.setBounds(130, 120, 200, 20);
lb2 = new JLabel("Fathername:");
lb2.setBounds(20, 150, 100, 20);
tf2 = new JTextField(100);
tf2.setBounds(130, 150, 200, 20);
lb3 = new JLabel("State:");
lb3.setBounds(20, 180, 100, 20);
tf3 = new JTextField(50);
tf3.setBounds(130, 180, 200, 20);
setLayout(null);
//Add components to the JFrame
add(lb5);
add(tf5);
add(lbd);
add(tfd);
add(btn);
add(lb);
add(lb1);
add(tf1);
add(lb2);
add(tf2);
add(lb3);
add(tf3);
//Set TextField Editable False
tf1.setEditable(false);
tf2.setEditable(false);
tf3.setEditable(false);
}
public void actionPerformed(ActionEvent e) {
//Create DataBase Coonection and Fetching Records
try {
String str = tf5.getText();
Datestri = tfd.getText();//Getting the unable to convert String to Date error
System.out.println(str);
System.out.println(stri);
Class.forName("oracle.jdbc.driver.OracleDriver");
Connection con = DriverManager.getConnection("jdbc:oracle:thin:#//host:port/servicename","username","password");
PreparedStatement st = con.prepareStatement("select Name,Fathername,State from student_db where roll_number=? and medium=?");
System.out.println(st);
st.setString(1, str);
st.setDate(2, stri);
//Excuting Query
ResultSet rs = st.executeQuery();
System.out.println(rs);
if (rs.next()) {
String s = rs.getString(1);
String s1 = rs.getString(2);
String s2 = rs.getString(3);
//Sets Records in TextFields.
tf1.setText(s);
tf2.setText(s1);
tf3.setText(s2);
} else {
JOptionPane.showMessageDialog(null, "Student not Found");
}
//Create Exception Handler
} catch (Exception ex) {
System.out.println(ex);
}
}
public void actionPerformed(ActionEvent e) {
//Create DataBase Coonection and Fetching Records
//Teacher information should be retrieved from the db
}
//Running Constructor
public static void main(String args[]) {
new Searchdb();
}
}
Thanks for any help in advance.

Hope, This will help
For JMenu you can use MenuListener
class MenuListenerAdapter implements MenuListener {
#Override
public void menuSelected(MenuEvent e) {
System.out.println("Menu Selected");
}
#Override
public void menuDeselected(MenuEvent e) {
System.out.println("Menu Deselected");
}
#Override
public void menuCanceled(MenuEvent e) {
System.out.println("Menu Canceled");
}
}
Then add MenuListener on menu
menu.addMenuListener(new MenuListenerAdapter());

You can use MouseListener,
Find your solution below, check out console when you click on Student and Teacher Menu
import java.awt.Color;
import java.awt.Font;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JMenu;
import javax.swing.JMenuBar;
import javax.swing.JTextField;
public class Searchdb extends JFrame implements ActionListener {
//Initializing Components
JLabel lb, lbd, lb1, lb2, lb3, lb5;
JTextField tf1, tf2, tf3, tf5, tfd;
JButton btn;
JMenuBar menuBar = new JMenuBar();
JMenu menu = new JMenu("Student");
JMenu menu1 = new JMenu("Teacher");
//Creating Constructor for initializing JFrame components
Searchdb() {
//Providing Title
super("Fetching Roll Information");
setJMenuBar(menuBar);
menuBar.add(menu);
menuBar.add(menu1);
menu.addMouseListener(new MouseListenerForStudentAndTeacher());
menu1.addMouseListener(new MouseListenerForStudentAndTeacher());
lb5 = new JLabel("Roll Number:");
lb5.setBounds(20, 20, 100, 20);
tf5 = new JTextField(20);
tf5.setBounds(130, 20, 200, 20);
lbd = new JLabel("Date:");
lbd.setBounds(20, 50, 100, 20);
tfd = new JTextField(20);
tfd.setBounds(130, 50, 200, 20);
btn = new JButton("Submit");
btn.setBounds(50, 50, 100, 20);
btn.addActionListener(this);
lb = new JLabel("Fetching Student Information From Database");
lb.setBounds(30, 80, 450, 30);
lb.setForeground(Color.black);
lb.setFont(new Font("Serif", Font.PLAIN, 12));
setVisible(true);
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
setSize(500, 500);
lb1 = new JLabel("Name:");
lb1.setBounds(20, 120, 100, 20);
tf1 = new JTextField(50);
tf1.setBounds(130, 120, 200, 20);
lb2 = new JLabel("Fathername:");
lb2.setBounds(20, 150, 100, 20);
tf2 = new JTextField(100);
tf2.setBounds(130, 150, 200, 20);
lb3 = new JLabel("State:");
lb3.setBounds(20, 180, 100, 20);
tf3 = new JTextField(50);
tf3.setBounds(130, 180, 200, 20);
setLayout(null);
//Add components to the JFrame
add(lb5);
add(tf5);
add(lbd);
add(tfd);
add(btn);
add(lb);
add(lb1);
add(tf1);
add(lb2);
add(tf2);
add(lb3);
add(tf3);
//Set TextField Editable False
tf1.setEditable(false);
tf2.setEditable(false);
tf3.setEditable(false);
}
public void actionPerformed(ActionEvent e) {
// removed code, you can add your code later on
}
public static void main(String args[]) {
new Searchdb();
}
private class MouseListenerForStudentAndTeacher extends MouseAdapter {
#Override
public void mouseClicked(MouseEvent e) {
if (e.getSource() == menu) {
System.out.println("Student Menu Clicked");
}
if (e.getSource() == menu1) {
System.out.println("Teacher Menu Clicked");
}
}
}
}

Adding JTable with custom size

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
public class Games {
private JFrame mainFrame;
private JLabel headerLabel;
private JLabel statusLabel;
private JPanel controlPanel;
public Games() {
prepareGUI();
}
public static void main(String[] args) {
Games games = new Games();
games.showTextFieldDemo();
}
private void prepareGUI() {
mainFrame = new JFrame("The Game Database");
mainFrame.setSize(1100, 800);
mainFrame.setLayout(new GridLayout(6, 1));
mainFrame.addWindowListener(new WindowAdapter() {
public void windowClosing(WindowEvent windowEvent) {
System.exit(0);
}
});
controlPanel = new JPanel();
controlPanel.setLayout(new GridBagLayout());
mainFrame.add(controlPanel);
mainFrame.setVisible(true);
}
private void showTextFieldDemo() {
String[] searchBasis = new String[] { "--Select--", "Genre", "Name of the Game", "Release Year" };
JLabel lblGenre = new JLabel("Genre", JLabel.RIGHT);
JLabel lblName = new JLabel("Name", JLabel.CENTER);
JLabel lblReleaseYear = new JLabel("Release Year", JLabel.CENTER);
JLabel lblSearchBasis = new JLabel("Search Basis", JLabel.CENTER);
JButton btnSearch = new JButton("Search");
JComboBox cmbBasis = new JComboBox<>(searchBasis);
final JTextField txtGenre = new JTextField(12);
final JTextField txtName = new JTextField(12);
final JTextField txtReleaseYear = new JTextField(12);
JTextArea txtContentArea = new JTextArea("hello");
txtContentArea.setSize(400, 400);
lblGenre.setEnabled(false);
txtGenre.setEnabled(false);
lblName.setEnabled(false);
txtName.setEnabled(false);
lblReleaseYear.setEnabled(false);
txtReleaseYear.setEnabled(false);
cmbBasis.addActionListener(new ActionListener() {
#Override
public void actionPerformed(ActionEvent e) {
if (cmbBasis.getSelectedItem().toString().equalsIgnoreCase("Genre")) {
lblGenre.setEnabled(true);
txtGenre.setEnabled(true);
lblName.setEnabled(false);
txtName.setEnabled(false);
lblReleaseYear.setEnabled(false);
txtReleaseYear.setEnabled(false);
} else if (cmbBasis.getSelectedItem().toString().equalsIgnoreCase("Name of the game")) {
lblGenre.setEnabled(false);
txtGenre.setEnabled(false);
lblName.setEnabled(true);
txtName.setEnabled(true);
lblReleaseYear.setEnabled(false);
txtReleaseYear.setEnabled(false);
} else if (cmbBasis.getSelectedItem().toString().equalsIgnoreCase("Release Year")) {
lblGenre.setEnabled(false);
txtGenre.setEnabled(false);
lblName.setEnabled(false);
txtName.setEnabled(false);
lblReleaseYear.setEnabled(true);
txtReleaseYear.setEnabled(true);
} else if (cmbBasis.getSelectedItem().toString().equalsIgnoreCase("--Select--")) {
lblGenre.setEnabled(false);
txtGenre.setEnabled(false);
lblName.setEnabled(false);
txtName.setEnabled(false);
lblReleaseYear.setEnabled(false);
txtReleaseYear.setEnabled(false);
}
}
});
btnSearch.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
String data = "Genre " + txtGenre.getText();
data += ", Name: " + new String(txtName.getText());
statusLabel.setText(data);
}
});
GridBagConstraints constraint = new GridBagConstraints();
constraint.gridx = 0;
constraint.gridy = 0;
constraint.insets = new Insets(3, 5, 3, 5);
controlPanel.add(lblSearchBasis, constraint);
constraint.gridx++;
controlPanel.add(cmbBasis, constraint);
constraint.gridy++;
constraint.gridx = 0;
constraint.insets = new Insets(3, 5, 3, 5);
controlPanel.add(lblGenre, constraint);
constraint.gridx++;
controlPanel.add(txtGenre, constraint);
constraint.gridx++;
controlPanel.add(lblName, constraint);
constraint.gridx++;
controlPanel.add(txtName, constraint);
constraint.gridx++;
controlPanel.add(lblReleaseYear, constraint);
constraint.gridx++;
controlPanel.add(txtReleaseYear, constraint);
constraint.gridx++;
controlPanel.add(btnSearch, constraint);
constraint.gridy++;
constraint.gridy++;
constraint.gridx = 0;
constraint.insets = new Insets(3, 5, 3, 5);
controlPanel.add(txtContentArea, constraint);
mainFrame.pack();
mainFrame.setResizable(false);
mainFrame.setVisible(true);
}
}
I have the above code, all I need is a custom sized 3 column JTable below these 3 textfields so I can populate my data there. I have tried many ways but didn't get much from that... they all are static in size.. kindly help me out. Thanks.

all I need is a custom sized 3 column JTable
Read the section from the Swing tutorial on Setting and Changing Column Widths for information on this.
Once you have set the column widths you can then use:
table.setPreferredScrollableViewportSize(table.getPreferredSize());
To set the preferred size of the JTable and its scroll pane.
mainFrame.addWindowListener(new WindowAdapter() {
Don't use a WindowListener to close the frame.
Instead you can just set a property of the JFrame when you create the frame:
mainFrame.addWindowListener(new WindowAdapter() {

Why is my JTable not showing?

I'm trying to create a address book and all I currently need is a table to store the data, however I cannot get it to display on the panel, any ideas why? I've got a method which should be creating the table on execution but its not.
private String name;
private String surname;
private String phone;
private String address;
static String summary;
private JPanel panel;
private JFrame frame;
private JLabel lblName;
private JLabel lblAddress;
private JLabel lblSurname;
private JLabel lblPhone;
private JTextField txtName;
private JTextField txtSurname;
private JTextField txtPhone;
private JTextField txtAddress;
private JButton btnSave;
private JButton btnUpload;
private JButton btnDelete;
String columns[] = {"Name","Surname","Phone","Address"};
String[][] data =
{{"human", "bean","07443244","somewhere"},
{"Max", "Kenny","044353534","Somewhere"}};
public AddressBook() {
createForm();
createLabels();
createTextField();
createButton();
createTable();
frame.add(panel);
frame.setVisible(true);
}
public void createLabels(){
lblName = new JLabel ("Name");
lblName.setBounds(10, 30, 100, 20);
panel.add (lblName);
lblSurname = new JLabel ("Surname");
lblSurname.setBounds(10, 50, 100, 20);
panel.add (lblSurname);
lblAddress = new JLabel ("Address");
lblAddress.setBounds(10, 70, 100, 20);
panel.add (lblAddress);
lblPhone = new JLabel ("Phone");
lblPhone.setBounds(10, 90, 100, 20);
panel.add (lblPhone);
}
public void createTextField(){
txtName = new JTextField (null);
txtName.setBounds(110, 30, 150, 20);
panel.add (txtName);
txtSurname = new JTextField (null);
txtSurname.setBounds(110, 50, 150, 20);
panel.add (txtSurname);
txtAddress = new JTextField (null);
txtAddress.setBounds(110, 70, 150, 20);
panel.add (txtAddress);
txtPhone = new JTextField (null);
txtPhone.setBounds(110, 90, 150, 20);
panel.add (txtPhone);
}
public void createForm(){
panel = new JPanel();
panel.setBorder (BorderFactory.createLineBorder (Color.RED, 3));
panel.setLayout(null);
frame = new JFrame();
frame.setTitle("Address Book");
frame.setSize(800,400);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
}
public void createButton(){
btnSave = new JButton ("Save to a file");
btnSave.setBounds(50, 200, 200, 20);
btnSave.addActionListener(new SaveHandler());
panel.add (btnSave);
btnDelete = new JButton ("Delete from the table");
btnDelete.setBounds(50, 300, 200, 20);
panel.add (btnDelete);
btnUpload = new JButton ("Upload file to table");
btnUpload.setBounds(50, 400, 200, 20);
panel.add (btnUpload);
}
public void createTable(){
JTable table = new JTable(data, columns);
DefaultTableModel model = new DefaultTableModel();
model.setColumnIdentifiers(columns);
table.setModel(model);
table.setBackground(Color.LIGHT_GRAY);
table.setForeground(Color.black);
table.setPreferredScrollableViewportSize(new Dimension(500, 70));
table.setFillsViewportHeight(true);
panel.add(table);
}
class SaveHandler implements ActionListener {
public void actionPerformed(ActionEvent e) {
if(e.getSource()==btnSave)
{
name = ("");
surname = ("");
phone = ("");
address = ("");
name = txtName.getText();
surname = txtSurname.getText();
phone = txtPhone.getText();
address = txtAddress.getText();
summary = ("Name:" +name)+(surname)+("Phone:" + phone)+("Address:" + address);
String saveFile = summary;
try {
BufferedWriter reader = new BufferedWriter(new FileWriter(new File("userinfo.txt"), true));
reader.write(saveFile);
reader.newLine();
reader.close();
JOptionPane.showMessageDialog(frame, "The details were sucessfuly saved");
} catch (IOException e1) {
e1.printStackTrace();
}
}
} }
public static void main(String[] args) {
new AddressBook();
}
}

panel.setLayout(null);
You chose to use no layout manager and handle all of the layout yourself.
JTable table = new JTable(data, columns);
table.setModel(model);
table.setBackground(Color.LIGHT_GRAY);
table.setForeground(Color.black);
table.setPreferredScrollableViewportSize(new Dimension(500, 70));
table.setFillsViewportHeight(true);
However, you did not specify a size and position for the JTable.
I recommend learning to use the layout managers instead. It will work better, it will handle the user resizing the window, and will make the code more maintainable.

Java Swing move JTextField values into second button

Perhaps this was already asked once but I am kinda stuck and cant find a solution by myself.
I got text from first button using text fields. And now i need to get this text into second button OR text file.
Code below and i know that this one gives error.
System.out.println("Author's name: " + newauthor());
System.out.println("Book name: " + newbook());
import java.awt.GridLayout;
import java.awt.event.*;
import java.io.FileNotFoundException;
import javax.swing.*;
public class library extends JFrame
{
private JPanel pnl;
public library() throws FileNotFoundException {
pnl = (JPanel) getContentPane();
JPanel panel = new JPanel();
getContentPane().add(panel);
panel.setLayout(null);
JButton addbutton = new JButton("Add new book");
addbutton.setBounds(75, 30, 150, 30);
addbutton.addActionListener(new ActionListener()
{
public void actionPerformed(ActionEvent event)
{
JTextField authorfield = new JTextField(15);
JTextField bookField = new JTextField(15);
JPanel mypanel = new JPanel(new GridLayout(0, 1));
mypanel.add(new JLabel("Type Author's Name and Book name:"));
mypanel.add(new JLabel("Author's Name:"));
mypanel.add(authorfield);
mypanel.add(new JLabel("Book name:"));
mypanel.add(bookField);
int result = JOptionPane.showConfirmDialog(null, mypanel,
"Add a new book", JOptionPane.OK_CANCEL_OPTION);
if (result == JOptionPane.OK_OPTION)
{
String newauthor = authorfield.getText();
String newbook = bookField.getText();
if (!newauthor.isEmpty() && !newbook.isEmpty())
{
JOptionPane.showMessageDialog(pnl, "Book "+bookField.getText()+"\nAuthor "+authorfield.getText()+"\nSuccessfully added to the list.",
"Book was added.", JOptionPane.INFORMATION_MESSAGE);
}
else
{
JOptionPane.showMessageDialog(pnl, "Both must be filled!",
"Error", JOptionPane.ERROR_MESSAGE);
}
}
}
});
panel.add(addbutton);
JButton listbutton = new JButton("List");
listbutton.setBounds(75, 60, 150, 30);
panel.add(listbutton);
addbutton.addActionListener(new ActionListener()
{
public void actionPerformed(ActionEvent event)
{
System.out.println("Author's name: " + newauthor());
System.out.println("Book name: " + newbook());
}
});
JButton deletebutton = new JButton("Delete");
deletebutton.setBounds(75, 90, 150, 30);
panel.add(deletebutton);
setTitle("Library Menu");
setSize(300, 200);
setLocationRelativeTo(null);
setDefaultCloseOperation(EXIT_ON_CLOSE);
}
public static void main(String[] args) throws FileNotFoundException {
library ex = new library();
ex.setVisible(true);
}
}

Your code is having many issues.
1.Both should be declared inside of your class but outside of your any method.
String newauthor = "";
String newbook = "";
Now in the if condition
if (result == JOptionPane.OK_OPTION)
{
newauthor = authorfield.getText();
newbook = bookField.getText();
..............................
2.
JButton listbutton = new JButton("List");
listbutton.setBounds(75, 60, 150, 30);
panel.add(listbutton);
listbutton.addActionListener(new ActionListener()// its listbutton not addbutton
{
public void actionPerformed(ActionEvent event)
{
System.out.println("Author's name: " + newauthor);
System.out.println("Book name: " + newbook);
}
});
Both newauthor and newbook are variables. But not methods.

plMortgage Calculator GUI Issue with A Lot

I am having a lot of issues with this application. I have been at this all day and cannot get this figured out. I have a Java application that is for a class. The issue that I am having is trying to get the JRadioButtons assigned to variables in the array then passing them into the formula. If someone could help I would appreciate it a lot.
import java.awt.*;
import java.awt.event.ActionListener;
import java.awt.event.ActionEvent;
import java.text.NumberFormat;
import javax.swing.*;
import javax.swing.border.*;
import javax.swing.JRadioButton;
public class MortgageCalculatorGUI8 extends JFrame {
JPanel panel1 = new JPanel();
double Principal;
double [] Interest = {5.35, 5.5, 5.75};
double temp_Interest;
int [] Length = {7, 15, 30};
int temp_Length;
boolean ok = false;
public MortgageCalculatorGUI8(){
getContentPane ().setLayout (null);
setSize (400,400);
panel1.setLayout (null);
panel1.setBounds (0, 0, 2000, 800);
add (panel1);
JLabel mortgageLabel = new JLabel("Mortgage Amount $", JLabel.LEFT);
mortgageLabel.setBounds (15, 15, 150, 30);
panel1.add (mortgageLabel);
final JTextField mortgageText = new JTextField(10);
mortgageText.setBounds (130, 15, 150, 30);
panel1.add (mortgageText);
JLabel termLabel = new JLabel("Mortgage Term (Years)", JLabel.LEFT);
termLabel.setBounds (340, 40, 150, 30);
panel1.add (termLabel);
JTextField termText = new JTextField(3);
termText.setBounds (340, 70, 150, 30);
panel1.add (termText);
JLabel intRateLabel = new JLabel("Interest Rate (%)", JLabel.LEFT);
intRateLabel.setBounds (340, 94, 150, 30);
panel1.add (intRateLabel);
JTextField intRateText = new JTextField(5);
intRateText.setBounds (340, 120, 150, 30);
panel1.add (intRateText);
JLabel mPaymentLabel = new JLabel("Monthly Payment $", JLabel.LEFT);
mPaymentLabel.setBounds (550, 40, 150, 30);
panel1.add (mPaymentLabel);
JTextField mPaymentText = new JTextField(10);
mPaymentText.setBounds (550, 70, 150, 30);
panel1.add (mPaymentText);
// JLabel paymentLabel = new JLabel ("Payment #");
// JLabel balLabel = new JLabel (" Balance");
// JLabel ytdPrincLabel = new JLabel (" Principal");
// JLabel ytdIntLabel = new JLabel (" Interest");
JTextArea textArea = new JTextArea(10, 31);
textArea.setBounds (550, 100, 150, 30);
panel1.add (textArea);
JScrollPane scroll = new JScrollPane(textArea, JScrollPane.VERTICAL_SCROLLBAR_ALWAYS,JScrollPane.HORIZONTAL_SCROLLBAR_ALWAYS);
scroll.setBounds (450, 200, 300, 150);
panel1.add (scroll);
public void rbuttons(){
JLabel tYears = new JLabel("Years of Loan Amount");
tYears.setBounds (30, 35, 150, 30);
panel1.add (tYears);
JRadioButton b7Yr = new JRadioButton("7 Years",false);
b7Yr.setBounds (30, 58, 150, 30);
panel1.add (b7Yr);
JRadioButton b15Yr = new JRadioButton("15 Years",false);
b15Yr.setBounds (30, 80, 150, 30);
panel1.add (b15Yr);
JRadioButton b30Yr = new JRadioButton("30 Years",false);
b30Yr.setBounds (30, 101, 150, 30);
panel1.add (b30Yr);
JLabel tInterest = new JLabel("Interest Rate Of the Loan");
tInterest.setBounds (175, 35, 150, 30);
panel1.add(tInterest);
JRadioButton b535Int = new JRadioButton("5.35% Interest",false);
b535Int.setBounds (178, 58, 150, 30);
panel1.add (b535Int);
JRadioButton b55Int = new JRadioButton("5.5% Interest",false);
b55Int.setBounds (178, 80, 150, 30);
panel1.add (b55Int);
JRadioButton b575Int = new JRadioButton("5.75% Interest",false);
b575Int.setBounds (178, 101, 150, 30);
panel1.add (b575Int);
}
JButton calculateButton = new JButton("CALCULATE");
calculateButton.setBounds (30, 400, 120, 30);
panel1.add (calculateButton);
calculateButton.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent e)
{
if(e.getSource () == b7Yr){
b7Yr = Length[0];
}
if(e.getSource () == b15Yr){
b15Yr = Length[1];
}
if(e.getSource () == b30Yr){
b30Yr = Length[2];
}
if(e.getSource () == b535Int){
b535Int = Interest[0];
}
if(e.getSource () == b55Int){
b55Int = Interest[1];
}
if(e.getSource () == b575Int){
b575Int = Interest[2];
}
double Principal;
// double [] Interest;
// int [] Length;
double M_Interest = Interest /(12*100);
double Months = Length * 12;
Principal = Double.parseDouble (mortgageText.getText());
double M_Payment = Principal * ( M_Interest / (1 - (Math.pow((1 + M_Interest), - Months))));
NumberFormat Money = NumberFormat.getCurrencyInstance();
}
});
JButton clearButton = new JButton("CLEAR");
clearButton.setBounds (160, 400, 120, 30);
panel1.add (clearButton);
clearButton.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent e)
{
mortgageText.setText (null);
b7Yr.setSelected (false);
b15Yr.setSelected (false);
b30Yr.setSelected (false);
b535Int.setSelected (false);
b55Int.setSelected (false);
b575Int.setSelected (false);
}
});
JButton exitButton = new JButton("EXIT");
exitButton.setBounds (290, 400, 120, 30);
panel1.add (exitButton);
exitButton.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent e)
{
System.exit(0);
}
});
}
public static void main(String[] args) {
MortgageCalculatorGUI8 frame = new MortgageCalculatorGUI8();
frame.setBounds (400, 200, 800, 800);
frame.setTitle ("Mortgage Calculator 1.0.4");
frame.setDefaultCloseOperation (EXIT_ON_CLOSE);
frame.setVisible (true);
}
}

Shoot, I'll show you in an example of what I meant in my last comment:
Myself, I'd create an array of JRadioButtons as a class field for each group that I used as well as a ButtonGroup object for each cluster of JRadioButtons. Then in my calculate JButton's ActionListener, I'd get the selected radiobutton by either looping through the radio button array or from the ButtonGroups getSelection method (note though that this returns a ButtonModel object or null if nothing is selected).
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
public class InfoFromRadioBtns extends JPanel {
private static final long serialVersionUID = 1L;
private int[] foobars = {1, 2, 5, 10, 20};
private JRadioButton[] foobarRButtons = new JRadioButton[foobars.length];
private ButtonGroup foobarBtnGroup = new ButtonGroup();
public InfoFromRadioBtns() {
// jpanel to hold one set of radio buttons
JPanel radioBtnPanel = new JPanel(new GridLayout(0, 1));
radioBtnPanel.setBorder(BorderFactory
.createTitledBorder("Choose a Foobar"));
// iterate through the radio button array creating buttons
// and adding them to the radioBtnPanel and the
// foobarBtnGroup ButtonGroup
for (int i = 0; i < foobarRButtons.length; i++) {
// string for radiobutton to dislay -- just the number
String buttonText = String.valueOf(foobars[i]);
JRadioButton radiobtn = new JRadioButton("foobar " + buttonText);
radiobtn.setActionCommand(buttonText); // one way to find out which
// button is selected
radioBtnPanel.add(radiobtn); // add radiobutton to its panel
foobarBtnGroup.add(radiobtn); // add radiobutton to its button group
// add to array
foobarRButtons[i] = radiobtn;
}
// one way to get the selected JRadioButton
JButton getRadioChoice1 = new JButton("Get Radio Choice 1");
getRadioChoice1.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
ButtonModel seletedModel = foobarBtnGroup.getSelection();
if (seletedModel != null) {
String actionCommand = seletedModel.getActionCommand();
System.out.println("selected foobar: " + actionCommand);
} else {
System.out.println("No foobar selected");
}
}
});
// another way to get the selected JRadioButton
JButton getRadioChoice2 = new JButton("Get Radio Choice 2");
getRadioChoice2.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
String actionCommand = "";
for (JRadioButton foobarRButton : foobarRButtons) {
if (foobarRButton.isSelected()) {
actionCommand = foobarRButton.getActionCommand();
}
}
if (actionCommand.isEmpty()) {
System.out.println("No foobar selected");
} else {
System.out.println("selected foobar: " + actionCommand);
}
}
});
JPanel jBtnPanel = new JPanel();
jBtnPanel.add(getRadioChoice1);
jBtnPanel.add(getRadioChoice2);
// make main GUI use a BordeLayout
setLayout(new BorderLayout());
add(radioBtnPanel, BorderLayout.CENTER);
add(jBtnPanel, BorderLayout.PAGE_END);
}
private static void createAndShowUI() {
JFrame frame = new JFrame("InfoFromRadioBtns");
frame.getContentPane().add(new InfoFromRadioBtns());
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.pack();
frame.setLocationRelativeTo(null);
frame.setVisible(true);
}
public static void main(String[] args) {
java.awt.EventQueue.invokeLater(new Runnable() {
public void run() {
createAndShowUI();
}
});
}
}
Whatever you do, don't try to copy and paste any of this code into your program, because it simply isn't going to work that way (on purpose). It was posted only to illustrate the concepts that I've discussed above.

I would extend JRadioButton to create a class capable of holding the variables you want. You can do this as an inner class to keep things simple.
private double pctinterest;
private int numyears; // within scope of your containing class
private class RadioButtonWithYears extends JRadioButton {
final private int years;
private int getYears() { return years; }
public RadioButtonWithYears(int years) {
super(years + " years",false);
this.years = years;
addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
numyears = getYears();
}
});
}
}
// elsewhere
RadioButtonWithYears b7Yr = new RadioButtonWithYears(7);
RadioButtonWithYears b15Yr = new RadioButtonWithYears(15);
RadioButtonWithYears b30Yr = new RadioButtonWithYears(30);
// then later
double M_Interest = java.lang.Math.pow((pctinternet / 100)+1, numyears);
Update: It isn't too far gone to salvage. I have incorporated the ButtonGroup as per Eels suggestion, and made the GUI part of it work (although you'll have to fix the layout) and marked where you need to sort out the calculation.
package stack.swing;
import java.awt.*;
import java.awt.event.ActionListener;
import java.awt.event.ActionEvent;
import java.math.BigDecimal;
import java.text.NumberFormat;
import javax.swing.*;
import javax.swing.border.*;
import javax.swing.JRadioButton;
public class MortgageCalculatorGUI8 extends JFrame {
JPanel panel1 = new JPanel();
Integer Principal;
boolean ok = false;
private BigDecimal temp_Interest;
private int temp_Length; // within scope of your containing class
private class JRadioButtonWithYears extends JRadioButton {
final private int years;
private int getYears() { return years; }
public JRadioButtonWithYears(int years) {
super(years + " years",false);
this.years = years;
addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
temp_Length = getYears();
}
});
}
}
private class JRadioButtonWithPct extends JRadioButton {
final private BigDecimal pct;
private BigDecimal getPct() { return pct; }
public JRadioButtonWithPct(String pct) {
super(pct + "%",false);
this.pct = new BigDecimal(pct);
addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
temp_Interest = getPct();
}
});
}
}
public MortgageCalculatorGUI8() {
getContentPane ().setLayout (null);
setSize (400,400);
panel1.setLayout (null);
panel1.setBounds (0, 0, 2000, 800);
add (panel1);
JLabel mortgageLabel = new JLabel("Mortgage Amount $", JLabel.LEFT);
mortgageLabel.setBounds (15, 15, 150, 30);
panel1.add (mortgageLabel);
final JTextField mortgageText = new JTextField(10);
mortgageText.setBounds (130, 15, 150, 30);
panel1.add (mortgageText);
JLabel termLabel = new JLabel("Mortgage Term (Years)", JLabel.LEFT);
termLabel.setBounds (340, 40, 150, 30);
panel1.add (termLabel);
JTextField termText = new JTextField(3);
termText.setBounds (340, 70, 150, 30);
panel1.add (termText);
JLabel intRateLabel = new JLabel("Interest Rate (%)", JLabel.LEFT);
intRateLabel.setBounds (340, 94, 150, 30);
panel1.add (intRateLabel);
JTextField intRateText = new JTextField(5);
intRateText.setBounds (340, 120, 150, 30);
panel1.add (intRateText);
JLabel mPaymentLabel = new JLabel("Monthly Payment $", JLabel.LEFT);
mPaymentLabel.setBounds (550, 40, 150, 30);
panel1.add (mPaymentLabel);
JTextField mPaymentText = new JTextField(10);
mPaymentText.setBounds (550, 70, 150, 30);
panel1.add (mPaymentText);
// JLabel paymentLabel = new JLabel ("Payment #");
// JLabel balLabel = new JLabel (" Balance");
// JLabel ytdPrincLabel = new JLabel (" Principal");
// JLabel ytdIntLabel = new JLabel (" Interest");
JTextArea textArea = new JTextArea(10, 31);
textArea.setBounds (550, 100, 150, 30);
panel1.add (textArea);
JScrollPane scroll = new JScrollPane(textArea, JScrollPane.VERTICAL_SCROLLBAR_ALWAYS,JScrollPane.HORIZONTAL_SCROLLBAR_ALWAYS);
scroll.setBounds (450, 200, 300, 150);
panel1.add (scroll);
// jpanel to hold one set of radio buttons
JPanel yearsPanel = new JPanel(new GridLayout(0, 1));
yearsPanel.setBorder(BorderFactory
.createTitledBorder("Years of Loan Amount"));
yearsPanel.setBounds(30, 55, 150, 150);
panel1.add (yearsPanel);
final ButtonGroup yearsGroup = new ButtonGroup();
int years[] = { 7, 15, 30 };
for (int i = 0; i < years.length; i++) {
JRadioButtonWithYears radiobtn = new JRadioButtonWithYears(years[i]);
yearsPanel.add(radiobtn); // add radiobutton to its panel
yearsGroup.add(radiobtn); // add radiobutton to its button group
}
// jpanel to hold one set of radio buttons
JPanel pctPanel = new JPanel(new GridLayout(0, 1));
pctPanel.setBorder(BorderFactory
.createTitledBorder("Interest Rate Of the Loan"));
pctPanel.setBounds(175, 55, 180, 150);
panel1.add (pctPanel);
final ButtonGroup pctGroup = new ButtonGroup();
String pct[] = { "5.35", "5.5", "5.75" };
for (int i = 0; i < pct.length; i++) {
JRadioButtonWithPct radiobtn = new JRadioButtonWithPct(pct[i]);
pctPanel.add(radiobtn); // add radiobutton to its panel
pctGroup.add(radiobtn); // add radiobutton to its button group
}
final JButton calculateButton = new JButton("CALCULATE");
calculateButton.setBounds (30, 400, 120, 30);
panel1.add (calculateButton);
calculateButton.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
double M_Interest = temp_Interest.doubleValue() /(12*100);
double Months = temp_Length * 12;
Principal = Integer.parseInt(mortgageText.getText());
double M_Payment = Principal * ( M_Interest / (1 - (Math.pow((1 + M_Interest), - Months))));
NumberFormat Money = NumberFormat.getCurrencyInstance();
/** MORE STUFF TO HAPPEN HERE */
}
});
JButton clearButton = new JButton("CLEAR");
clearButton.setBounds (160, 400, 120, 30);
panel1.add (clearButton);
clearButton.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
mortgageText.setText (null);
yearsGroup.clearSelection();
pctGroup.clearSelection();
}
});
JButton exitButton = new JButton("EXIT");
exitButton.setBounds (290, 400, 120, 30);
panel1.add (exitButton);
exitButton.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
System.exit(0);
}
});
}
public static void main(String[] args) {
MortgageCalculatorGUI8 frame = new MortgageCalculatorGUI8();
frame.setBounds (400, 200, 800, 800);
frame.setTitle ("Mortgage Calculator 1.0.4");
frame.setDefaultCloseOperation (EXIT_ON_CLOSE);
frame.setVisible (true);
}
}