Using user inputs in other class

[Taylan Altay Senturk]

Hi Everyone,

I have a LoginScreen class and one other class in my project. I want use user inputs (Username And Password) on other class if users details is true. I am stcuk at this point because when user attempt to Login connection is succesfully and other frame is coming to screen but i can reach user details anymore. Let me explain with codes;

LoginScreen class

/*
 * 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 deneme3;

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.SQLException;
import javax.swing.JOptionPane;

/**
 *
 * @author Lacrymae_Ev
 */
public class LoginScreen extends javax.swing.JFrame {

    /**
     * Creates new form LoginScreen
     */
    public LoginScreen() {
        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();
        unametextfield = new javax.swing.JTextField();
        passpasswordfield = new javax.swing.JPasswordField();
        loginbuton = new javax.swing.JButton();
        cancelbutton = new javax.swing.JButton();

        setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);

        jLabel1.setFont(new java.awt.Font("Tahoma", 1, 11)); // NOI18N
        jLabel1.setHorizontalAlignment(javax.swing.SwingConstants.CENTER);
        jLabel1.setText("U.name");

        jLabel2.setFont(new java.awt.Font("Tahoma", 1, 11)); // NOI18N
        jLabel2.setHorizontalAlignment(javax.swing.SwingConstants.CENTER);
        jLabel2.setText("Password");

        loginbuton.setText("Login");
        loginbuton.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                loginbutonActionPerformed(evt);
            }
        });

        cancelbutton.setText("Cancel");

        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.createParallelGroup(javax.swing.GroupLayout.Alignment.TRAILING, false)
                        .addComponent(
                           unametextfield, javax.swing.GroupLayout.Alignment.LEADING)
                        .addComponent(jLabel1, javax.swing.GroupLayout.Alignment.LEADING,
                      javax.swing.GroupLayout.DEFAULT_SIZE, 98, Short.MAX_VALUE))
                    .addComponent(loginbuton, javax.swing.GroupLayout.Alignment.TRAILING,
                        javax.swing.GroupLayout.PREFERRED_SIZE, 73,
                        javax.swing.GroupLayout.PREFERRED_SIZE))
                .addGap(18, 18, 18)
                .addGroup(layout.createParallelGroup(
                                         javax.swing.GroupLayout.Alignment.LEADING)
                    .addGroup(layout.createSequentialGroup()
                        .addGroup(layout.createParallelGroup(
                              javax.swing.GroupLayout.Alignment.LEADING, false)
                            .addComponent(jLabel2, javax.swing.GroupLayout.DEFAULT_SIZE, 98,
                               Short.MAX_VALUE)
                            .addComponent(passpasswordfield))
                        .addGap(0, 0, Short.MAX_VALUE))
                    .addGroup(layout.createSequentialGroup()
                        .addGap(10, 10, 10)
                        .addComponent(cancelbutton, javax.swing.GroupLayout.PREFERRED_SIZE,
                              73, javax.swing.GroupLayout.PREFERRED_SIZE)
                        .addContainerGap(20, Short.MAX_VALUE))))
        );
        layout.setVerticalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(layout.createSequentialGroup()
                .addGroup(layout.createParallelGroup(
                       javax.swing.GroupLayout.Alignment.BASELINE)
                    .addComponent(jLabel1)
                    .addComponent(jLabel2))
                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                .addGroup(layout.createParallelGroup(
                       javax.swing.GroupLayout.Alignment.BASELINE)
                    .addComponent(unametextfield,
                       javax.swing.GroupLayout.PREFERRED_SIZE,
                       javax.swing.GroupLayout.DEFAULT_SIZE,
                       javax.swing.GroupLayout.PREFERRED_SIZE)
                    .addComponent(passpasswordfield, javax.swing.GroupLayout.PREFERRED_SIZE,
                        javax.swing.GroupLayout.DEFAULT_SIZE,
                        javax.swing.GroupLayout.PREFERRED_SIZE))
                .addPreferredGap(
                       javax.swing.LayoutStyle.ComponentPlacement.UNRELATED)
                .addGroup(layout.createParallelGroup(
                         javax.swing.GroupLayout.Alignment.BASELINE)
                    .addComponent(loginbuton)
                    .addComponent(cancelbutton))
                .addGap(0, 20, Short.MAX_VALUE))
        );

        pack();
    }// </editor-fold>                        


    /**
     *
     */

    /*public void getPassword () {
     String pass = new String (passpasswordfield.getPassword());
    }*/    
       
      
    private void loginbutonActionPerformed(java.awt.event.ActionEvent evt) {                                           
        // TODO add your handling code here:
        String uname1 = unametextfield.getText();
        try {  
        Class.forName("com.microsoft.sqlserver.jdbc.SQLServerDriver");
        String connectionUrl = "jdbc:sqlserver://192.168.100.100;" +
         "databaseName=ExampleDB;" + "user=" + unametextfield.getText() + ";" +
          "password=" + new String (passpasswordfield.getPassword()) + ";"; 
        Connection con = DriverManager.getConnection(connectionUrl);
        con.close();
        new MainProgramWindow().setVisible(true);
        dispose();
        }
    catch (SQLException e) {
            JOptionPane.showMessageDialog(this, "Kullanıcı Adı veya Şifre Yanlış!");
        } 
    catch (ClassNotFoundException cE) {
            System.out.println("Class Not Found Exception: "+ cE.toString());
        }
    }                                          

    /**
     * @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(
                 LoginScreen.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (InstantiationException ex) {
            java.util.logging.Logger.getLogger(
                 LoginScreen.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (IllegalAccessException ex) {
            java.util.logging.Logger.getLogger(
                 LoginScreen.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (javax.swing.UnsupportedLookAndFeelException ex) {
            java.util.logging.Logger.getLogger(
                 LoginScreen.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 LoginScreen().setVisible(true);
            }
        });
    }

    // Variables declaration - do not modify                     
    private javax.swing.JButton cancelbutton;
    private javax.swing.JLabel jLabel1;
    private javax.swing.JLabel jLabel2;
    private javax.swing.JButton loginbuton;
    private javax.swing.JPasswordField passpasswordfield;
    private javax.swing.JTextField unametextfield;
    // End of variables declaration                   
}

MainProgramWindow class

/*
 * 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 deneme3;

/**
 *
 * @author Lacrymae_Ev
 */
public class MainProgramWindow extends javax.swing.JFrame {

    /**
     * Creates new form MainProgramWindow
     */
    
    LoginScreen LS = new LoginScreen();
    
    public MainProgramWindow() {
        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() {

        GetDetailsButton = new javax.swing.JButton();

        setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);

        GetDetailsButton.setText("Get");
        GetDetailsButton.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                GetDetailsButtonActionPerformed(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(154, 154, 154)
                .addComponent(GetDetailsButton)
                .addContainerGap(197, Short.MAX_VALUE))
        );
        layout.setVerticalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(layout.createSequentialGroup()
                .addGap(115, 115, 115)
                .addComponent(GetDetailsButton)
                .addContainerGap(162, Short.MAX_VALUE))
        );

        pack();
    }// </editor-fold>                        

    private void GetDetailsButtonActionPerformed(java.awt.event.ActionEvent evt) {                                                 
        // TODO add your handling code here: 
        System.out.println( ?????? );
    }                                                

    /**
     * @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(
                MainProgramWindow.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (InstantiationException ex) {
            java.util.logging.Logger.getLogger(
                  MainProgramWindow.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (IllegalAccessException ex) {
            java.util.logging.Logger.getLogger(
                 MainProgramWindow.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (javax.swing.UnsupportedLookAndFeelException ex) {
            java.util.logging.Logger.getLogger(
                 MainProgramWindow.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 MainProgramWindow().setVisible(true);
            }
        });
    }

    // Variables declaration - do not modify                     
    private javax.swing.JButton GetDetailsButton;
    // End of variables declaration                   
}

You can see Button Action in MainProgramWindow " System.out.println( ??? );" How i can retrieve users inputs from this class ?

Thanks

[Campbell Ritchie]

Welcome to the Ranch

I have had to break the lines because the code which NetBeans produces automatically goes off the margins of the screen.

You should not pass anything like that to a GUI class. You should have a class which manages logins, and retrieve the data from a GUI class to the login manager class. You should have only one JFrame or class extending it, and object instantiated from it for one application. If you need a second object to manage input, it is probably best to use an object of one of the dialogue classes.

[Taylan Altay Senturk]

Sorry fort the long lines. I solve this problem.