I have a homework with Celsius to Fahrenheit converter, which asks such things:
User should insert the Celsius value, click the “Convert” button and get the Fahrenheit value;
User should insert the Fahrenheit value, click the “Convert” button and get the Celsius value;
After showing the result for the temperature conversion, if the button “Convert” is clicked-on again, all input-output text-fields in the GUI should be cleared.
However, I have struggled in implementing several actions in one button. Where is my mistake (the code of events in jButton1ActionPerformed)?
There is a code in Java, I use Netbeans 8.1: as follows
import java.util.Scanner;
import javax.swing.JOptionPane;
public class TConverter extends javax.swing.JFrame {
/**
* Creates new form TConverter
*/
public TConverter() {
initComponents();
}
/**
* This method is called from within the constructor to initialize the form.
* WARNING: Do NOT modify this code. The content of this method is always
* regenerated by the Form Editor.
*/
#SuppressWarnings("unchecked")
// <editor-fold defaultstate="collapsed" desc="Generated Code">
private void initComponents() {
jLabel1 = new javax.swing.JLabel();
jLabel2 = new javax.swing.JLabel();
jButton1 = new javax.swing.JButton();
jButton2 = new javax.swing.JButton();
jTextField1 = new javax.swing.JTextField();
jTextField2 = new javax.swing.JTextField();
setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
jLabel1.setText("Celcius");
jLabel2.setText("Fahrenheit");
jButton1.setText("Convert");
jButton1.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
jButton1ActionPerformed(evt);
}
});
jButton2.setText("Reset");
jButton2.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
jButton2ActionPerformed(evt);
}
});
jTextField1.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
jTextField1ActionPerformed(evt);
}
});
jTextField2.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
jTextField2ActionPerformed(evt);
}
});
javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
getContentPane().setLayout(layout);
layout.setHorizontalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addGap(52, 52, 52)
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addComponent(jButton1)
.addGroup(layout.createSequentialGroup()
.addGap(19, 19, 19)
.addComponent(jLabel1)))
.addGap(39, 39, 39))
.addGroup(javax.swing.GroupLayout.Alignment.TRAILING, layout.createSequentialGroup()
.addContainerGap()
.addComponent(jLabel2)
.addGap(47, 47, 47)))
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING, false)
.addComponent(jButton2, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
.addComponent(jTextField1)
.addComponent(jTextField2))
.addContainerGap(177, Short.MAX_VALUE))
);
layout.setVerticalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addGap(72, 72, 72)
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
.addComponent(jLabel1)
.addComponent(jTextField1, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))
.addGap(27, 27, 27)
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
.addComponent(jLabel2)
.addComponent(jTextField2, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))
.addGap(48, 48, 48)
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
.addComponent(jButton1)
.addComponent(jButton2))
.addContainerGap(90, Short.MAX_VALUE))
);
pack();
}// </editor-fold>
private void jButton2ActionPerformed(java.awt.event.ActionEvent evt) {
jTextField1.setText("");
jTextField2.setText("");
}
private void jTextField1ActionPerformed(java.awt.event.ActionEvent evt) {
}
private void jTextField2ActionPerformed(java.awt.event.ActionEvent evt) {
}
private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) {
float CelciusInput = Float.parseFloat(jTextField1.getText());
float FahrenheitInput = Float.parseFloat(jTextField1.getText());
if (!(jTextField1.getText().isEmpty()))
{
try
{
jTextField2.setText(String.valueOf((CelciusInput * 1.8) + 32));
}
catch (Exception ex)
{
}
}
else if (!(jTextField2.getText().isEmpty()))
{
try
{
jTextField1.setText(String.valueOf((FahrenheitInput - 32) * 5 / 9));
}
catch (Exception ex)
{
}
}
else if (String.valueOf(jTextField2.getText()).equals(String.valueOf(jTextField1.getText())))
{
jTextField1.setText("");
jTextField2.setText("");
}
else
{
JOptionPane.showMessageDialog(null, "Wrong type of input",
"Error dialog message", JOptionPane.ERROR_MESSAGE);
}
}
/**
* #param args the command line arguments
*/
public static void main(String args[]) {
/* Set the Nimbus look and feel */
//<editor-fold defaultstate="collapsed" desc=" Look and feel setting code (optional) ">
/* If Nimbus (introduced in Java SE 6) is not available, stay with the default look and feel.
* For details see http://download.oracle.com/javase/tutorial/uiswing/lookandfeel/plaf.html
*/
try {
for (javax.swing.UIManager.LookAndFeelInfo info : javax.swing.UIManager.getInstalledLookAndFeels()) {
if ("Nimbus".equals(info.getName())) {
javax.swing.UIManager.setLookAndFeel(info.getClassName());
break;
}
}
} catch (ClassNotFoundException ex) {
java.util.logging.Logger.getLogger(TConverter.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (InstantiationException ex) {
java.util.logging.Logger.getLogger(TConverter.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (IllegalAccessException ex) {
java.util.logging.Logger.getLogger(TConverter.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (javax.swing.UnsupportedLookAndFeelException ex) {
java.util.logging.Logger.getLogger(TConverter.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
}
//</editor-fold>
/* Create and display the form */
java.awt.EventQueue.invokeLater(new Runnable() {
public void run() {
new TConverter().setVisible(true);
}
});
}
// Variables declaration - do not modify
private javax.swing.JButton jButton1;
private javax.swing.JButton jButton2;
private javax.swing.JLabel jLabel1;
private javax.swing.JLabel jLabel2;
private javax.swing.JTextField jTextField1;
private javax.swing.JTextField jTextField2;
// End of variables declaration }
Try the below code and see if it suits you :
private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) {
float CelciusInput;
float FahrenheitInput;
if (!(jTextField1.getText().isEmpty())) {
if (jTextField2.getText().isEmpty()) {
try {
CelciusInput = Float.parseFloat(jTextField1.getText());
jTextField2.setText(String.valueOf((CelciusInput * 1.8) + 32));
} catch (Exception ex) {
JOptionPane.showMessageDialog(null, "Wrong type of input",
"Error dialog message", JOptionPane.ERROR_MESSAGE);
jTextField1.setText("");
jTextField2.setText("");
return;
}
} else {
jTextField1.setText("");
jTextField2.setText("");
}
} else if (!(jTextField2.getText().isEmpty())) {
try {
FahrenheitInput = Float.parseFloat(jTextField2.getText());
jTextField1.setText(String.valueOf((FahrenheitInput - 32) * 5 / 9));
} catch (Exception ex) {
JOptionPane.showMessageDialog(null, "Wrong type of input",
"Error dialog message", JOptionPane.ERROR_MESSAGE);
jTextField1.setText("");
jTextField2.setText("");
}
}
}
you already found out how to handle events. to performe different actions according to input, you have to check these condidtions (as you already do)...
it would be really helpful to put these into seperate methods
private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) {
if (isCelsionSet() && !isFarenheitSet() )
{
convertCelsiusToFarenheit();
}
else if(!isCelsionSet() && !isFarenheitSet()){
notifyEmptyFields();
}
else if(!isCelsionSet() && isFarenheitSet()){
convertFarenheitToCelsius();
}
else if(isCelsionSet() && isFarenheitSet()){
clearInput();
}
}
now you can test and verify each method seperate
private boolean isCelsionSet(){
//FIXME rename jTextField1 into celsiusInput
try{
Float.parseFloat(jTextField1.getText());
return true; //field is indeed properly set
}catch(NumberFormatException e){
return false; //field is not properly set
}
}
private void convertFahrenheitToCelsius(){
//FIXME rename jTextField2 into farenheitInput
float celsius = getTempInCelsius();
jTextField2.setText(String.valueOf((celsius * 1.8) + 32));
}
if you follow up this road you will easily find your mistake and creat code that is readable and maintainable.
I'm sorry that i don't read all your code, its (hopefully soon no more) messy, right now...
Note for Testing
once you have made the code changes you can easily create a test:
#Test
public void testIsCelsiusEmpty(){
TConverter tconverter = new TConverter();
tconverter.celsiusInput.setText("12.3"); //after renaming jTextField1 into celsiusInput
Assert.assertTrue(tconverter.isCelsionSet());
}
Related
I am developing a restaurant management system in Java Swing. I have displayed a list of checkboxes dynamically from databases which contains the names of mainstock (table names which contains mainstock items).I have added an ItemListener on each checkbox during the loop.
When I click each checkbox, it popups two JFrame. Why? How could I popup only one JFrame and insert required information?
package test;
public class test extends javax.swing.JFrame {
public static ArrayList<mdetails> list = new ArrayList<mdetails>();
public test() {
initComponents();
Connection con = (Connection) dbconnection.makeconnection();
String sql="select * from mainstock";
try{
Statement st = con.createStatement();
ResultSet rs = st.executeQuery(sql);
while(rs.next()){
String s2=rs.getString("stock_name");
JCheckBox cb = new JCheckBox("New CheckBox");
cb.setText(s2);
cb.setVisible(true);
cb.addItemListener(new ItemListener() {
#Override
public void itemStateChanged(ItemEvent e) {
String name = cb.getActionCommand();
System.out.println(name);
JFrame frame = new JFrame(name);
int stock_id= rmsdao.givestockid(name);
System.out.println(stock_id);
String estimatedplate = JOptionPane.showInputDialog(frame, "Enter the estimated plate of 1 kg"+name);
if(estimatedplate!=null){
list.add(new mdetails(stock_id,estimatedplate));
}
else{
cb.setSelected(false);
}
}
});
jPanel1.add(cb);
jPanel1.validate();
}
con.close();
}
catch(Exception e){
System.out.println("not retrieving"+e);
}
}
#SuppressWarnings("unchecked")
// <editor-fold defaultstate="collapsed" desc="Generated Code">
private void initComponents() {
jPanel1 = new javax.swing.JPanel();
jButton1 = new javax.swing.JButton();
setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
setResizable(false);
jButton1.setText("jButton1");
jButton1.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
jButton1ActionPerformed(evt);
}
});
javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
getContentPane().setLayout(layout);
layout.setHorizontalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(javax.swing.GroupLayout.Alignment.TRAILING, layout.createSequentialGroup()
.addContainerGap(65, Short.MAX_VALUE)
.addComponent(jPanel1, javax.swing.GroupLayout.PREFERRED_SIZE, 252, javax.swing.GroupLayout.PREFERRED_SIZE)
.addGap(23, 23, 23))
.addGroup(layout.createSequentialGroup()
.addGap(129, 129, 129)
.addComponent(jButton1)
.addContainerGap(javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
);
layout.setVerticalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(javax.swing.GroupLayout.Alignment.TRAILING, layout.createSequentialGroup()
.addContainerGap(37, Short.MAX_VALUE)
.addComponent(jPanel1, javax.swing.GroupLayout.PREFERRED_SIZE, 191, javax.swing.GroupLayout.PREFERRED_SIZE)
.addGap(50, 50, 50)
.addComponent(jButton1)
.addContainerGap())
);
pack();
}// </editor-fold>
private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) {
for (int a = 0; a < list.size(); a++) {
mdetails item = list.get(a);
System.out.println(item.getId());
// rmsdao.insert_menu_details(item.getId(),getitemid,item.getEstimate_plate());
}
}
public static void main(String args[]) {
/* Set the Nimbus look and feel */
//<editor-fold defaultstate="collapsed" desc=" Look and feel setting code (optional) ">
/* If Nimbus (introduced in Java SE 6) is not available, stay with the default look and feel.
* For details see http://download.oracle.com/javase/tutorial/uiswing/lookandfeel/plaf.html
*/
try {
for (javax.swing.UIManager.LookAndFeelInfo info : javax.swing.UIManager.getInstalledLookAndFeels()) {
if ("Nimbus".equals(info.getName())) {
javax.swing.UIManager.setLookAndFeel(info.getClassName());
break;
}
}
} catch (ClassNotFoundException ex) {
java.util.logging.Logger.getLogger(test.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (InstantiationException ex) {
java.util.logging.Logger.getLogger(test.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (IllegalAccessException ex) {
java.util.logging.Logger.getLogger(test.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (javax.swing.UnsupportedLookAndFeelException ex) {
java.util.logging.Logger.getLogger(test.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
}
//</editor-fold>
/* Create and display the form */
java.awt.EventQueue.invokeLater(new Runnable() {
public void run() {
new test().setVisible(true);
}
});
}
// Variables declaration - do not modify
private javax.swing.JButton jButton1;
private javax.swing.JPanel jPanel1;
// End of variables declaration
}
I want to write data in note pad by clicking that buttons.
By using using my code I tried to write in note pad it's not working. I want functionality like same as on-screen keyboard of windows. By windows on-screen keyboard we can write in note pad as well as in google chrome like that I want to create the application.
How can I create like that by using java ?
I tried below way but it's not working.
import java.awt.AWTException;
import java.awt.Robot;
import java.awt.event.KeyEvent;
import java.util.logging.Level;
import java.util.logging.Logger;
public class OnclickTest extends javax.swing.JFrame {
Robot robot;
public OnclickTest() throws AWTException {
initComponents();
robot = new Robot();
}
#SuppressWarnings("unchecked")
// <editor-fold defaultstate="collapsed" desc="Generated Code">
private void initComponents() {
jButton1 = new javax.swing.JButton();
jButton2 = new javax.swing.JButton();
jButton3 = new javax.swing.JButton();
jButton4 = new javax.swing.JButton();
setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
jButton1.setText("PAGE UP");
jButton1.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
jButton1ActionPerformed(evt);
}
});
jButton2.setText("PAGE DOWN");
jButton2.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
jButton2ActionPerformed(evt);
}
});
jButton3.setText("A");
jButton3.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
jButton3ActionPerformed(evt);
}
});
jButton4.setText("B");
jButton4.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
jButton4ActionPerformed(evt);
}
});
javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
getContentPane().setLayout(layout);
layout.setHorizontalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addGap(60, 60, 60)
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.TRAILING)
.addComponent(jButton3)
.addComponent(jButton1))
.addGap(31, 31, 31)
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addComponent(jButton2)
.addComponent(jButton4))
.addContainerGap(141, Short.MAX_VALUE))
);
layout.setVerticalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addGap(68, 68, 68)
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
.addComponent(jButton1)
.addComponent(jButton2))
.addGap(18, 18, 18)
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
.addComponent(jButton3)
.addComponent(jButton4))
.addContainerGap(168, Short.MAX_VALUE))
);
pack();
}// </editor-fold>
private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) {
// TODO add your handling code here:
robot.keyPress(KeyEvent.VK_PAGE_UP);
robot.keyRelease(KeyEvent.VK_PAGE_UP);
}
private void jButton2ActionPerformed(java.awt.event.ActionEvent evt) {
// TODO add your handling code here:
robot.keyPress(KeyEvent.VK_PAGE_DOWN);
robot.keyRelease(KeyEvent.VK_PAGE_DOWN);
}
private void jButton3ActionPerformed(java.awt.event.ActionEvent evt) {
// TODO add your handling code here:
robot.keyPress(KeyEvent.VK_A);
robot.keyRelease(KeyEvent.VK_A);
}
private void jButton4ActionPerformed(java.awt.event.ActionEvent evt) {
// TODO add your handling code here:
robot.keyPress(KeyEvent.VK_B);
robot.keyRelease(KeyEvent.VK_B);
}
/**
* #param args the command line arguments
*/
public static void main(String args[]) {
/* Set the Nimbus look and feel */
//<editor-fold defaultstate="collapsed" desc=" Look and feel setting code (optional) ">
/* If Nimbus (introduced in Java SE 6) is not available, stay with the default look and feel.
* For details see http://download.oracle.com/javase/tutorial/uiswing/lookandfeel/plaf.html
*/
try {
for (javax.swing.UIManager.LookAndFeelInfo info : javax.swing.UIManager.getInstalledLookAndFeels()) {
if ("Nimbus".equals(info.getName())) {
javax.swing.UIManager.setLookAndFeel(info.getClassName());
break;
}
}
} catch (ClassNotFoundException ex) {
java.util.logging.Logger.getLogger(OnclickTest.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (InstantiationException ex) {
java.util.logging.Logger.getLogger(OnclickTest.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (IllegalAccessException ex) {
java.util.logging.Logger.getLogger(OnclickTest.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (javax.swing.UnsupportedLookAndFeelException ex) {
java.util.logging.Logger.getLogger(OnclickTest.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
}
//</editor-fold>
/* Create and display the form */
java.awt.EventQueue.invokeLater(new Runnable() {
public void run() {
try {
new OnclickTest().setVisible(true);
} catch (AWTException ex) {
Logger.getLogger(OnclickTest.class.getName()).log(Level.SEVERE, null, ex);
}
}
});
}
// Variables declaration - do not modify
private javax.swing.JButton jButton1;
private javax.swing.JButton jButton2;
private javax.swing.JButton jButton3;
private javax.swing.JButton jButton4;
}
I am a newbie in Java, I need changing the background Color of a progress bar, but really I don't know how to do this
I have a progress bar called "barrita"
I am using Linux Ubuntu and Java 8 and I am using the palette of Swing
package loginprogressbar;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.KeyEvent;
import javax.swing.JOptionPane;
import javax.swing.Timer;
/**
*
* #author fernando
*/
public class Inicio extends javax.swing.JFrame {
private Timer tiempo;
int contador;
public static final int TWO_SECOND = 2;
class TimerListener implements ActionListener {
#Override
public void actionPerformed(ActionEvent e) {
contador += 1;
barrita.setValue(contador);
if (contador == 100) {
tiempo.stop();
esconder();
Menu1 m1 = new Menu1();
m1.setVisible(true);
m1.setLocationRelativeTo(null);
}
}
}
public void esconder() {
this.setVisible(false);
}
public void activar() {
tiempo.start();
}
public Inicio() {
initComponents();
setLocationRelativeTo(null);
barrita.setVisible(false);
}
public void inicionSesion() {
String usuario = panel2.getText();
String password = (String.valueOf(txtPassword.getText()));
if (usuario.equals("fernando") && password.compareTo("12345") == 0) {
barrita.setVisible(true);
contador = -1;
barrita.setValue(0);
barrita.setStringPainted(true);
tiempo = new Timer(TWO_SECOND, new TimerListener());
activar();
} else {
JOptionPane.showMessageDialog(null, "Error al ingresar usuario o contraseña incorrecta");
panel2.setText("");
txtPassword.setText("");
panel2.requestFocus();
}
}
/**
* This method is called from within the constructor to initialize the form.
* WARNING: Do NOT modify this code. The content of this method is always
* regenerated by the Form Editor.
*/
#SuppressWarnings("unchecked")
// <editor-fold defaultstate="collapsed" desc="Generated Code">
private void initComponents() {
panel1 = new javax.swing.JPanel();
panel2 = new javax.swing.JTextField();
jLabel1 = new javax.swing.JLabel();
jLabel2 = new javax.swing.JLabel();
txtPassword = new javax.swing.JPasswordField();
btnEntrar = new javax.swing.JButton();
barrita = new javax.swing.JProgressBar();
setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
getContentPane().setLayout(new org.netbeans.lib.awtextra.AbsoluteLayout());
panel1.addKeyListener(new java.awt.event.KeyAdapter() {
public void keyPressed(java.awt.event.KeyEvent evt) {
panel1KeyPressed(evt);
}
});
panel2.addKeyListener(new java.awt.event.KeyAdapter() {
public void keyPressed(java.awt.event.KeyEvent evt) {
panel2KeyPressed(evt);
}
});
jLabel1.setText("Nombre");
jLabel2.setText("Contraseña");
txtPassword.addKeyListener(new java.awt.event.KeyAdapter() {
public void keyPressed(java.awt.event.KeyEvent evt) {
txtPasswordKeyPressed(evt);
}
});
btnEntrar.setText("Ingresar");
btnEntrar.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
btnEntrarActionPerformed(evt);
}
});
javax.swing.GroupLayout panel1Layout = new javax.swing.GroupLayout(panel1);
panel1.setLayout(panel1Layout);
panel1Layout.setHorizontalGroup(
panel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(javax.swing.GroupLayout.Alignment.TRAILING, panel1Layout.createSequentialGroup()
.addContainerGap(javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
.addComponent(btnEntrar)
.addGap(83, 83, 83))
.addGroup(panel1Layout.createSequentialGroup()
.addGap(58, 58, 58)
.addGroup(panel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(panel1Layout.createSequentialGroup()
.addComponent(barrita, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
.addContainerGap(javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
.addGroup(panel1Layout.createSequentialGroup()
.addGroup(panel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addComponent(jLabel1)
.addComponent(jLabel2))
.addGap(18, 18, 18)
.addGroup(panel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addComponent(txtPassword)
.addComponent(panel2, javax.swing.GroupLayout.DEFAULT_SIZE, 130, Short.MAX_VALUE))
.addGap(113, 113, 113))))
);
panel1Layout.setVerticalGroup(
panel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(panel1Layout.createSequentialGroup()
.addGap(39, 39, 39)
.addGroup(panel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
.addComponent(panel2, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
.addComponent(jLabel1))
.addGap(21, 21, 21)
.addGroup(panel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
.addComponent(jLabel2)
.addComponent(txtPassword, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))
.addGap(26, 26, 26)
.addComponent(barrita, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
.addGap(18, 18, 18)
.addComponent(btnEntrar)
.addContainerGap(93, Short.MAX_VALUE))
);
getContentPane().add(panel1, new org.netbeans.lib.awtextra.AbsoluteConstraints(0, 0, 400, 300));
pack();
}// </editor-fold>
private void panel1KeyPressed(java.awt.event.KeyEvent evt) {
if (evt.getKeyCode() == KeyEvent.VK_ENTER) {
inicionSesion();
}
}
private void btnEntrarActionPerformed(java.awt.event.ActionEvent evt) {
inicionSesion(); // TODO add your handling code here:
}
private void txtPasswordKeyPressed(java.awt.event.KeyEvent evt) {
if (evt.getKeyCode() == KeyEvent.VK_ENTER) {
btnEntrar.requestFocus();
}
}
private void panel2KeyPressed(java.awt.event.KeyEvent evt) {
if (evt.getKeyCode() == KeyEvent.VK_ENTER) {
txtPassword.requestFocus();
}
}
/**
* #param args the command line arguments
*/
public static void main(String args[]) {
/* Set the Nimbus look and feel */
//<editor-fold defaultstate="collapsed" desc=" Look and feel setting code (optional) ">
/* If Nimbus (introduced in Java SE 6) is not available, stay with the default look and feel.
* For details see http://download.oracle.com/javase/tutorial/uiswing/lookandfeel/plaf.html
*/
try {
for (javax.swing.UIManager.LookAndFeelInfo info : javax.swing.UIManager.getInstalledLookAndFeels()) {
if ("Nimbus".equals(info.getName())) {
javax.swing.UIManager.setLookAndFeel(info.getClassName());
break;
}
}
} catch (ClassNotFoundException ex) {
java.util.logging.Logger.getLogger(Inicio.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (InstantiationException ex) {
java.util.logging.Logger.getLogger(Inicio.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (IllegalAccessException ex) {
java.util.logging.Logger.getLogger(Inicio.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (javax.swing.UnsupportedLookAndFeelException ex) {
java.util.logging.Logger.getLogger(Inicio.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
}
//</editor-fold>
/* Create and display the form */
java.awt.EventQueue.invokeLater(new Runnable() {
public void run() {
new Inicio().setVisible(true);
}
});
}
// Variables declaration - do not modify
private javax.swing.JProgressBar barrita;
private javax.swing.JButton btnEntrar;
private javax.swing.JLabel jLabel1;
private javax.swing.JLabel jLabel2;
private javax.swing.JPanel panel1;
private javax.swing.JTextField panel2;
private javax.swing.JPasswordField txtPassword;
// End of variables declaration
}
I have write a code to find a word in JTextPane. Problem here is when I enter a search word and click on search button it was highlight the all the occurrence of the given search word. I want to Highlight the first occurrence of the word then click on search button shows second occurrence of the way like that. Another one is it was not unHighlight the after search complete when click on text pane.
My code:
public class FindAWord extends javax.swing.JFrame {
public static void main(String args[]) {
/* Set the Nimbus look and feel */
// <editor-fold defaultstate="collapsed"
// desc=" Look and feel setting code (optional) ">
/*
* If Nimbus (introduced in Java SE 6) is not available, stay with the
* default look and feel. For details see
* http://download.oracle.com/javase
* /tutorial/uiswing/lookandfeel/plaf.html
*/
try {
for (javax.swing.UIManager.LookAndFeelInfo info : javax.swing.UIManager
.getInstalledLookAndFeels()) {
if ("Nimbus".equals(info.getName())) {
javax.swing.UIManager.setLookAndFeel(info.getClassName());
break;
}
}
} catch (ClassNotFoundException ex) {
java.util.logging.Logger.getLogger(MarkAll.class.getName()).log(
java.util.logging.Level.SEVERE, null, ex);
} catch (InstantiationException ex) {
java.util.logging.Logger.getLogger(MarkAll.class.getName()).log(
java.util.logging.Level.SEVERE, null, ex);
} catch (IllegalAccessException ex) {
java.util.logging.Logger.getLogger(MarkAll.class.getName()).log(
java.util.logging.Level.SEVERE, null, ex);
} catch (javax.swing.UnsupportedLookAndFeelException ex) {
java.util.logging.Logger.getLogger(MarkAll.class.getName()).log(
java.util.logging.Level.SEVERE, null, ex);
}
// </editor-fold>
/* Create and display the form */
java.awt.EventQueue.invokeLater(new Runnable() {
#Override
public void run() {
new MarkAll().setVisible(true);
}
});
}
Highlighter.HighlightPainter myHighLightPainter = new FindAWord.MyHighightPainter(
Color.LIGHT_GRAY);
// Variables declaration - do not modify
private javax.swing.JScrollPane scrollPane;
private javax.swing.JTextField searchText;
private javax.swing.JTextPane textPane;
private javax.swing.JButton search;
public FindAWord() {
initComponents();
}
public void removeHighLights(JTextComponent component) {
Highlighter hilet = component.getHighlighter();
Highlighter.Highlight[] highLites = hilet.getHighlights();
for (int i = 0; i < highLites.length; i++) {
if (highLites[i].getPainter() instanceof MarkAll.MyHighightPainter) {
hilet.removeHighlight(highLites[i]);
}
}
}
public void highLight(JTextComponent component, String patteren) {
try {
removeHighLights(component);
Highlighter hLite = component.getHighlighter();
Document doc = component.getDocument();
String text = component.getText(0, doc.getLength());
int pos = 0;
while ((pos = text.toUpperCase().indexOf(patteren.toUpperCase(),
pos)) >= 0) {
hLite.addHighlight(pos, pos + patteren.length(),
myHighLightPainter);
pos += patteren.length();
}
} catch (Exception e) {
}
}
#SuppressWarnings("unchecked")
// <editor-fold defaultstate="collapsed" desc="Generated Code">
private void initComponents() {
search = new javax.swing.JButton();
searchText = new javax.swing.JTextField();
scrollPane = new javax.swing.JScrollPane();
textPane = new javax.swing.JTextPane();
setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
search.setText("Search");
search.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
searchActionPerformed(evt);
}
});
scrollPane.setViewportView(textPane);
javax.swing.GroupLayout layout = new javax.swing.GroupLayout(
getContentPane());
getContentPane().setLayout(layout);
layout.setHorizontalGroup(layout
.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(
layout.createSequentialGroup()
.addGap(36, 36, 36)
.addComponent(search,
javax.swing.GroupLayout.PREFERRED_SIZE,
91,
javax.swing.GroupLayout.PREFERRED_SIZE)
.addGap(32, 32, 32)
.addComponent(searchText,
javax.swing.GroupLayout.PREFERRED_SIZE,
120,
javax.swing.GroupLayout.PREFERRED_SIZE)
.addContainerGap(114, Short.MAX_VALUE))
.addGroup(
javax.swing.GroupLayout.Alignment.TRAILING,
layout.createSequentialGroup().addComponent(scrollPane)
.addContainerGap()));
layout.setVerticalGroup(layout
.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(
layout.createSequentialGroup()
.addGap(36, 36, 36)
.addGroup(
layout.createParallelGroup(
javax.swing.GroupLayout.Alignment.BASELINE)
.addComponent(search)
.addComponent(
searchText,
javax.swing.GroupLayout.PREFERRED_SIZE,
javax.swing.GroupLayout.DEFAULT_SIZE,
javax.swing.GroupLayout.PREFERRED_SIZE))
.addPreferredGap(
javax.swing.LayoutStyle.ComponentPlacement.RELATED)
.addComponent(scrollPane,
javax.swing.GroupLayout.DEFAULT_SIZE,
235, Short.MAX_VALUE)));
pack();
}// </editor-fold>
private void searchActionPerformed(java.awt.event.ActionEvent evt) {
if (searchText.getText().length() == 0) {
removeHighLights(textPane);
} else
highLight(textPane, searchText.getText());
}
class MyHighightPainter extends DefaultHighlighter.DefaultHighlightPainter {
MyHighightPainter(Color color) {
super(color);
}
}
}
If you need just to highlight one word you don't need all the addHighlight() and removeHighlight() calls.
Just figure out the word's offset (and length) and use setSelectionStart()/setSelectionEnd() method of the JTextPane passing the word start and start + length
UPDATE as requested the working code
import javax.swing.text.*;
import java.awt.*;
public class FindAWord extends javax.swing.JFrame {
public static void main(String args[]) {
/* Set the Nimbus look and feel */
//<editor-fold defaultstate="collapsed" desc=" Look and feel setting code (optional) ">
/* If Nimbus (introduced in Java SE 6) is not available, stay with the default look and feel.
* For details see http://download.oracle.com/javase/tutorial/uiswing/lookandfeel/plaf.html
*/
try {
for (javax.swing.UIManager.LookAndFeelInfo info : javax.swing.UIManager.getInstalledLookAndFeels()) {
if ("Nimbus".equals(info.getName())) {
javax.swing.UIManager.setLookAndFeel(info.getClassName());
break;
}
}
} catch (Exception ex) {
ex.printStackTrace();
}
//</editor-fold>
/* Create and display the form */
java.awt.EventQueue.invokeLater(new Runnable() {
#Override
public void run() {
new FindAWord().setVisible(true);
}
});
}
Highlighter.HighlightPainter myHighLightPainter=new FindAWord.MyHighightPainter(Color.LIGHT_GRAY);
// Variables declaration - do not modify
private javax.swing.JScrollPane scrollPane;
private javax.swing.JTextField searchText;
private javax.swing.JTextPane textPane;
private javax.swing.JButton search;
public FindAWord() {
initComponents();
}
public void highLight(JTextComponent component,String patteren){
try {
Document doc=component.getDocument();
String text=component.getText(0,doc.getLength());
int pos=component.getCaretPosition();
if (pos==doc.getLength()) {
pos=0;
}
int index=text.toUpperCase().indexOf(patteren.toUpperCase(),pos);
if (index>=0) {
component.setSelectionStart(index);
component.setSelectionEnd(index+patteren.length());
component.getCaret().setSelectionVisible(true);
}
}
catch(Exception e){
e.printStackTrace();
}
}
#SuppressWarnings("unchecked")
// <editor-fold defaultstate="collapsed" desc="Generated Code">
private void initComponents() {
search = new javax.swing.JButton();
searchText = new javax.swing.JTextField();
scrollPane = new javax.swing.JScrollPane();
textPane = new javax.swing.JTextPane();
searchText.setText("test");
textPane.setText("test qweqw test asdasdas test");
setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
search.setText("Search");
search.setFocusable(false);
search.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
searchActionPerformed(evt);
}
});
scrollPane.setViewportView(textPane);
javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
getContentPane().setLayout(layout);
layout.setHorizontalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addGap(36, 36, 36)
.addComponent(search, javax.swing.GroupLayout.PREFERRED_SIZE, 91, javax.swing.GroupLayout.PREFERRED_SIZE)
.addGap(32, 32, 32)
.addComponent(searchText, javax.swing.GroupLayout.PREFERRED_SIZE, 120, javax.swing.GroupLayout.PREFERRED_SIZE)
.addContainerGap(114, Short.MAX_VALUE))
.addGroup(javax.swing.GroupLayout.Alignment.TRAILING, layout.createSequentialGroup()
.addComponent(scrollPane)
.addContainerGap())
);
layout.setVerticalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addGap(36, 36, 36)
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
.addComponent(search)
.addComponent(searchText, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
.addComponent(scrollPane, javax.swing.GroupLayout.DEFAULT_SIZE, 235, Short.MAX_VALUE))
);
pack();
}// </editor-fold>
private void searchActionPerformed(java.awt.event.ActionEvent evt) {
highLight(textPane, searchText.getText());
}
class MyHighightPainter extends DefaultHighlighter.DefaultHighlightPainter{
MyHighightPainter(Color color){
super(color);
}
}
}
I have the code to do this, but I can't do it. I made something similar and worked without problem ( and asked here too) . Basically I am trying to pass the username that I enter into my textbox to a label from my otherJFrame ( I know it's not good practice to have 2 JFrames ).
The code where I try to parse my data is supposed to happen here :
if( rs.next() )
{
JOptionPane.showMessageDialog(null, "Successfully Logged In", "Success", JOptionPane.INFORMATION_MESSAGE);
this.setVisible(false);
new FrmMain2(username).setVisible(true);
}
This is the whole code from the 1'st frame
/*
* To change this license header, choose License Headers in Project Properties.
* To change this template file, choose Tools | Templates
* and open the template in the editor.
*/
package mysqltryouts;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.Statement;
import java.util.Scanner;
import javax.swing.JFrame;
import javax.swing.JOptionPane;
/**
*
* #author ExtremeSwat
*/
public class login_panel extends javax.swing.JFrame {
private Connection connect = null;
private Statement statement = null;
private PreparedStatement preparedStatement = null;
private ResultSet resultSet = null;
public void readDataBase() throws Exception
{
String username = jTextField1.getText();
String password = jPasswordField1.getText();
// System.out.println(username);
// System.out.println(password);
// System.out.println("test");
//---------------------
// String databaseUsername = "";
// String databasePassword = "";
try {
// this will load the MySQL driver, each DB has its own driver
Class.forName("com.mysql.jdbc.Driver");
// setup the connection with the DB.
connect = DriverManager
.getConnection("jdbc:mysql://localhost/cards?"
+ "user=root&password=password");
//String sqlQuery = "select count(*) > 0 as match_found FROM username WHERE username = ? and password = MD5(?)";
String sqlQuery = "SELECT * FROM username WHERE username = ? and password = MD5(?)";
// String sqlQuery = "select count(*) > 0 as cnt FROM username WHERE username = ? and password = MD5(?)";
PreparedStatement pst = connect.prepareStatement( sqlQuery );
pst.setString( 1, username );
pst.setString( 2, password );
ResultSet rs = pst.executeQuery();
if( rs.next() )
{
JOptionPane.showMessageDialog(null, "Successfully Logged In", "Success", JOptionPane.INFORMATION_MESSAGE);
//this.setVisible(false);
//new FrmMain().setVisible(true);
//this.setVisible(false);
//new FrmMain(username).setVisible(true);
this.setVisible(false);
new FrmMain2(username).setVisible(true);
}
else
{
JOptionPane.showMessageDialog(null, "Failed to log in", "Failure", JOptionPane.WARNING_MESSAGE);
}
} catch (Exception e) {
throw e;
} finally {
close();
}
}
private void close() {
close(resultSet);
close(statement);
close(connect);
}
private void close(AutoCloseable c) throws UnsupportedOperationException {
try {
if (c != null) {
c.close();
}
} catch (Exception e) {
// don't throw now as it might leave following closables in undefined state
}
}
/**
* Creates new form login_panel
*/
public login_panel() {
initComponents();
}
/**
* This method is called from within the constructor to initialize the form.
* WARNING: Do NOT modify this code. The content of this method is always
* regenerated by the Form Editor.
*/
#SuppressWarnings("unchecked")
// <editor-fold defaultstate="collapsed" desc="Generated Code">
private void initComponents() {
jTextField1 = new javax.swing.JTextField();
jPasswordField1 = new javax.swing.JPasswordField();
jLabel1 = new javax.swing.JLabel();
jLabel2 = new javax.swing.JLabel();
jButton1 = new javax.swing.JButton();
jButton2 = new javax.swing.JButton();
jLabel3 = new javax.swing.JLabel();
setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
jTextField1.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
jTextField1ActionPerformed(evt);
}
});
jPasswordField1.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
jPasswordField1ActionPerformed(evt);
}
});
jLabel1.setText("Username");
jLabel2.setText("Password");
jButton1.setText("Login");
jButton1.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
jButton1ActionPerformed(evt);
}
});
jButton2.setText("eXIT");
jButton2.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
jButton2ActionPerformed(evt);
}
});
jLabel3.setFont(new java.awt.Font("Old English Text MT", 1, 36)); // NOI18N
jLabel3.setText("Login B0$$");
javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
getContentPane().setLayout(layout);
layout.setHorizontalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(javax.swing.GroupLayout.Alignment.TRAILING, layout.createSequentialGroup()
.addContainerGap(66, Short.MAX_VALUE)
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(javax.swing.GroupLayout.Alignment.TRAILING, layout.createSequentialGroup()
.addComponent(jButton2)
.addContainerGap())
.addGroup(javax.swing.GroupLayout.Alignment.TRAILING, layout.createSequentialGroup()
.addComponent(jLabel3)
.addGap(53, 53, 53))))
.addGroup(layout.createSequentialGroup()
.addGap(20, 20, 20)
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addComponent(jLabel1)
.addComponent(jLabel2))
.addGap(18, 18, 18)
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addComponent(jTextField1, javax.swing.GroupLayout.PREFERRED_SIZE, 92, javax.swing.GroupLayout.PREFERRED_SIZE)
.addGap(18, 18, 18)
.addComponent(jButton1))
.addComponent(jPasswordField1, javax.swing.GroupLayout.PREFERRED_SIZE, 92, javax.swing.GroupLayout.PREFERRED_SIZE))
.addContainerGap(javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
);
layout.setVerticalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addContainerGap()
.addComponent(jLabel3)
.addGap(38, 38, 38)
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
.addComponent(jLabel1)
.addComponent(jTextField1, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
.addComponent(jButton1))
.addGap(4, 4, 4)
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
.addComponent(jLabel2)
.addComponent(jPasswordField1, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED, 63, Short.MAX_VALUE)
.addComponent(jButton2))
);
pack();
}// </editor-fold>
private void jTextField1ActionPerformed(java.awt.event.ActionEvent evt) {
// TODO add your handling code here:
}
private void jPasswordField1ActionPerformed(java.awt.event.ActionEvent evt) {
// TODO add your handling code here:
}
private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) {
try{
// login_panel dao = new login_panel();
//
//
// dao.readDataBase();
this.readDataBase();
}
catch(Exception e)
{
System.out.println(e.getMessage());
}
}
private void jButton2ActionPerformed(java.awt.event.ActionEvent evt) {
int dialogButton = JOptionPane.YES_NO_OPTION;
int dialogResult = JOptionPane.showConfirmDialog(null, "Exit? ", "Information",dialogButton);
if(dialogResult == JOptionPane.YES_OPTION)
{
JOptionPane.showMessageDialog(null, "Thanks for the stay","Confirm",JOptionPane.INFORMATION_MESSAGE);
System.exit(0);
}else
{
JOptionPane.showMessageDialog(null, "Remaining...","Remaining....",JOptionPane.INFORMATION_MESSAGE);
}
}
/**
* #param args the command line arguments
*/
public static void main(String args[]) {
/* Set the Nimbus look and feel */
//<editor-fold defaultstate="collapsed" desc=" Look and feel setting code (optional) ">
/* If Nimbus (introduced in Java SE 6) is not available, stay with the default look and feel.
* For details see http://download.oracle.com/javase/tutorial/uiswing/lookandfeel/plaf.html
*/
try {
for (javax.swing.UIManager.LookAndFeelInfo info : javax.swing.UIManager.getInstalledLookAndFeels()) {
if ("Nimbus".equals(info.getName())) {
javax.swing.UIManager.setLookAndFeel(info.getClassName());
break;
}
}
} catch (ClassNotFoundException ex) {
java.util.logging.Logger.getLogger(login_panel.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (InstantiationException ex) {
java.util.logging.Logger.getLogger(login_panel.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (IllegalAccessException ex) {
java.util.logging.Logger.getLogger(login_panel.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (javax.swing.UnsupportedLookAndFeelException ex) {
java.util.logging.Logger.getLogger(login_panel.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
}
//</editor-fold>
/* Create and display the form */
java.awt.EventQueue.invokeLater(new Runnable() {
public void run() {
//new login_panel().setVisible(true);
login_panel frame = new login_panel();
frame.setLocationRelativeTo(null);
frame.setVisible(true);
}
});
}
// Variables declaration - do not modify
private javax.swing.JButton jButton1;
private javax.swing.JButton jButton2;
private javax.swing.JLabel jLabel1;
private javax.swing.JLabel jLabel2;
private javax.swing.JLabel jLabel3;
private javax.swing.JPasswordField jPasswordField1;
private javax.swing.JTextField jTextField1;
// End of variables declaration
}
The code from the second form is
package mysqltryouts;
import javax.swing.*;
import java.awt.*;
//am cancer
public class FrmMain2 {
private String userName;
public FrmMain2(String username) {
this.userName=username;
gui();
}
public void gui()
{
JFrame f = new JFrame("Ma JFrame");
JPanel p = new JPanel();
p.setBackground(Color.YELLOW);
f.setSize(600,400);
f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
JButton b1 = new JButton("Back");
JLabel l1 = new JLabel("Username");
l1.setText(userName);
p.add(b1);
p.add(l1);
f.add(p);
f.setVisible(true);
}
public static void main(String[] args)
{
//new FrmMain2(username);
}
}
So I want to transfer the username String to my label from MainFrame2. I had a similar problem that I posted it here ( and solved) but I can't do it.....
You state:
I know it's not good practice to have 2 JFrames
Then don't do this. The login "JFrame" should be a modal JDialog. Period. End of Story.
Why?
Then the main GUI can call the dialog knowing that code control will return right back to the spot where the dialog was made visible once the dialog is no longer visible. Then it will be trivial for the main GUI to query the state of your dialog's user provided data and move forward.
For example: https://stackoverflow.com/a/21462653/522444
Just bite the bullet and do it and you won't regret it.