Une boite de dialogue

import com.trolltech.qt.gui.*;
 
public class LoginBox extends QWidget
{
        /* Données dont un accès peut-être utile depuis le reste de la classe */
    private QLineEdit loginLineEdit;
    private QLineEdit passwordLineEdit;
    private QLineEdit serverLineEdit;
    private QLineEdit portLineEdit;
    private QCheckBox sslCheckBox;
    private QLineEdit ressourceLineEdit;
    
        public LoginBox()
        {
        /** Login's GroupBox' **/
        QGroupBox loginGroup = new QGroupBox(tr("Login's informations:"));
 
        /* Login Line Edit with Label */
        QLabel loginLabel = new QLabel(tr("Jabber ID:"));
        loginLineEdit = new QLineEdit();
        loginLineEdit.setFocus();
        
        /* Password LineEdit with Label */
        QLabel passwordLabel = new QLabel(tr("Password:"));
        passwordLineEdit = new QLineEdit();
        passwordLineEdit.setEchoMode(QLineEdit.EchoMode.Password);
        
        /* Login's Layout */
        QGridLayout loginLayout = new QGridLayout();
        loginLayout.addWidget(loginLabel, 0, 0);
        loginLayout.addWidget(loginLineEdit, 0, 1);
        loginLayout.addWidget(passwordLabel, 1, 0);
        loginLayout.addWidget(passwordLineEdit, 1, 1);
        loginGroup.setLayout(loginLayout);
        
        /** Account GroupBox **/
        QGroupBox accountGroup = new QGroupBox(tr("Server settings:"));
 
        /* Server Line Edit with Label */
        QLabel serverLabel = new QLabel(tr("Server:"));
        serverLineEdit = new QLineEdit();
        
        /* Port LineEdit with Label and SSL selection */
        QLabel portLabel = new QLabel(tr("Port:"));
        portLineEdit = new QLineEdit("5222");
        sslCheckBox = new QCheckBox(tr("Using SSL"));
        
        /* Ressource Line Edit with Label */
        QLabel ressourceLabel = new QLabel(tr("Ressource:"));
        ressourceLineEdit = new QLineEdit("jTalk");
        
        /* Login's Layout */
        QGridLayout accountLayout = new QGridLayout();
        accountLayout.addWidget(serverLabel, 0, 0);
        accountLayout.addWidget(serverLineEdit, 0, 1, 1, 2);
        accountLayout.addWidget(portLabel, 1, 0);
        accountLayout.addWidget(portLineEdit, 1, 1);
        accountLayout.addWidget(sslCheckBox, 1, 2);
        accountLayout.addWidget(ressourceLabel, 2, 0);
        accountLayout.addWidget(ressourceLineEdit, 2, 1, 1, 2);
        accountGroup.setLayout(accountLayout);
        
        /* Dialog Button Box */
        QDialogButtonBox boutons = new QDialogButtonBox();
                boutons.addButton(QDialogButtonBox.StandardButton.Ok);
                boutons.addButton(QDialogButtonBox.StandardButton.Cancel);
        
        // Dialog Layout
        QGridLayout layout = new QGridLayout();
        layout.addWidget(loginGroup, 0, 0);
        layout.addWidget(accountGroup, 1, 0);
        layout.addWidget(boutons, 2, 0);
        setLayout(layout);
        setWindowTitle(tr("Jabber Account Configuration"));
        setLayout(layout);
        }
        
        public static void main(String args[])
        {
            QApplication.initialize(args);
        
            LoginBox widget = new LoginBox();
            widget.show();
        
            QApplication.exec();
        }
}

QMessageBox.warning(null, tr("My Application"),
                         tr("The document has been modified.\n"+
                         "Do you want to save your changes?"), new QMessageBox.StandardButtons(QMessageBox.StandardButton.Save, QMessageBox.StandardButton.Discard, QMessageBox.StandardButton.Cancel));