how to close first form and set form values in 2nd form's text field

[Azeem Rathore]

Hi my first language is German so bear with my English i am new to programming so kindly help me
I have login form which has 4 textfields username ,password, unit code ,unit code name after writing user name and password when i focus on unit code textfield another form pop up i have used Jlist and populate it with unit codes values from database and i have select button at the button of list it works fine according to my requirement
next step is when select unitcode in jlist and hit the select button it select the jlist value and fetch the unit name from database table and it should close the jlist pop up form and go back to login form and set the 4th textfield from unit name which retrieves from the previous form i hope i make you understand the code for the button is

private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) {
String query="select unit_name from unitcodeInfoo where unitcode='" + jlist.getSelectedItem().toString(); + "'";
  rset=stmt.executeQuery(query);
  if(rset.next()){
  value=rset.getString("unit_name");

 this.setVisible(false);   // this close form but how to go back to previous form and set the 4th textfield value ?
  }
 } 

one logic is this.close(); but it how to set value in unit name textfield in login form?
i cant use new login().setVisible(true); it create new form and i want to go back to my previous form

[Khuzema Dharwala]

How you created another form for your unit code textfield ?

[Azeem Rathore]

In the login form i have 4text field username password unit code when focus on unit table jlist form open just like pop up window the purpose for this jlisf form is to select unit code number so that when user select unit code 4th field populates automatic with unit name hope it makes sense

[Azeem Rathore]

In the login form i have 4text field username password unit code when focus on unit code textfield jlist form open just like pop up window the purpose for this jlist form is to select unit code number then query runs fetch unitcode name from where unit code match and then jlist form close and redirect to login form and set value of unit code in unit code text field and unit name in unitname textfield
Just tell me how to go back to previous form(login)

[Khuzema Dharwala]

Can't you get the reference of your original login form object inside your jButton1ActionPerformed method code ? If you get that you can easily call setVisible(true) on that object after calling this.setVisible(false) inside jButton1ActionPerformed method.

[Azeem Rathore]

Yes i can use reference of login but it open new login form and username and password field become empty user has to enter username and password again.
In the login form if i enter username and password then focus on third field jlist form open
If i use reference like
Login log= new login();
Login.setvisible(true);
Then it open new login form but i want to go back to previous login form where username and password already set in the text field

[Khuzema Dharwala]

I need to see your login form and jlist form code, can you paste them here ?

[Azeem Rathore]

here is the login code and also view the pic of login gui you will have idea what i m doing

public class login extends javax.swing.JFrame {
public String usern;
   public String pass;
    /**
     *
     * Creates new form login
     */
    ResultSet rset;
    Connection conn = null;
    Statement stmt = null;
    String query;
    Sec_Users d = new Sec_Users();
     String unitname;
    public login() {
        initComponents();
        
        
    }
    public login(String text) {
       unitname = text;
        
        
        initComponents();
    }

   
    @SuppressWarnings("unchecked")
    // <editor-fold defaultstate="collapsed" desc="Generated Code">                          
    private void initComponents() {

        jPanel1 = new javax.swing.JPanel();
        jLabel1 = new javax.swing.JLabel();
        jPanel2 = new javax.swing.JPanel();
        jLabel2 = new javax.swing.JLabel();
        jLabel3 = new javax.swing.JLabel();
        username = new javax.swing.JTextField();
        jLabel4 = new javax.swing.JLabel();
        unitcode1 = new javax.swing.JTextField();
        unitName = new javax.swing.JTextField();
        login = new javax.swing.JButton();
        cancel = new javax.swing.JButton();
        password = new javax.swing.JPasswordField();
        jLabel5 = new javax.swing.JLabel();

        setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
        setTitle("Login");
        setBackground(new java.awt.Color(0, 153, 153));
        setForeground(new java.awt.Color(0, 153, 153));
        setName("MAINFrame\n"); // NOI18N
        addWindowListener(new java.awt.event.WindowAdapter() {
            public void windowOpened(java.awt.event.WindowEvent evt) {
                formWindowOpened(evt);
            }
        });

        jPanel1.setBackground(new java.awt.Color(0, 153, 153));

        jLabel1.setFont(new java.awt.Font("Tahoma", 1, 14)); // NOI18N
        jLabel1.setForeground(new java.awt.Color(255, 255, 255));
        jLabel1.setText("                          Login Screen");

        javax.swing.GroupLayout jPanel1Layout = new javax.swing.GroupLayout(jPanel1);
        jPanel1.setLayout(jPanel1Layout);
        jPanel1Layout.setHorizontalGroup(
            jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(jPanel1Layout.createSequentialGroup()
                .addGap(184, 184, 184)
                .addComponent(jLabel1, javax.swing.GroupLayout.PREFERRED_SIZE, 335, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addContainerGap(193, Short.MAX_VALUE))
        );
        jPanel1Layout.setVerticalGroup(
            jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(javax.swing.GroupLayout.Alignment.TRAILING, jPanel1Layout.createSequentialGroup()
                .addContainerGap(24, Short.MAX_VALUE)
                .addComponent(jLabel1)
                .addGap(23, 23, 23))
        );

        jLabel2.setText("Username");

        jLabel3.setText("Password");

        username.setBorder(new javax.swing.border.LineBorder(new java.awt.Color(0, 0, 0), 1, true));
        username.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                usernameActionPerformed(evt);
            }
        });

        jLabel4.setText("Unit Code");

        unitcode1.setBorder(new javax.swing.border.LineBorder(new java.awt.Color(0, 0, 0), 1, true));
        unitcode1.addMouseListener(new java.awt.event.MouseAdapter() {
            public void mouseClicked(java.awt.event.MouseEvent evt) {
                unitcode1MouseClicked(evt);
            }
        });
        unitcode1.addFocusListener(new java.awt.event.FocusAdapter() {
            public void focusGained(java.awt.event.FocusEvent evt) {
                unitcode1FocusGained(evt);
            }
        });

        unitName.setBorder(new javax.swing.border.LineBorder(new java.awt.Color(0, 0, 0), 1, true));

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

        cancel.setText("Cancel");

        password.setBorder(new javax.swing.border.LineBorder(new java.awt.Color(0, 0, 0), 1, true));

        jLabel5.setText("Unit Name");

        javax.swing.GroupLayout jPanel2Layout = new javax.swing.GroupLayout(jPanel2);
        jPanel2.setLayout(jPanel2Layout);
        jPanel2Layout.setHorizontalGroup(
            jPanel2Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(jPanel2Layout.createSequentialGroup()
                .addGap(222, 222, 222)
                .addGroup(jPanel2Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                    .addGroup(jPanel2Layout.createSequentialGroup()
                        .addComponent(login)
                        .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.UNRELATED)
                        .addComponent(cancel))
                    .addGroup(jPanel2Layout.createSequentialGroup()
                        .addGroup(jPanel2Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                            .addGroup(jPanel2Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING, false)
                                .addComponent(jLabel4, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
                                .addComponent(jLabel2, javax.swing.GroupLayout.DEFAULT_SIZE, 85, Short.MAX_VALUE)
                                .addComponent(jLabel3, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
                            .addComponent(jLabel5))
                        .addGap(18, 18, 18)
                        .addGroup(jPanel2Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                            .addComponent(unitName, javax.swing.GroupLayout.PREFERRED_SIZE, 70, javax.swing.GroupLayout.PREFERRED_SIZE)
                            .addGroup(jPanel2Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING, false)
                                .addComponent(username, javax.swing.GroupLayout.DEFAULT_SIZE, 148, Short.MAX_VALUE)
                                .addComponent(unitcode1, javax.swing.GroupLayout.PREFERRED_SIZE, 72, javax.swing.GroupLayout.PREFERRED_SIZE)
                                .addComponent(password)))))
                .addContainerGap(javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
        );
        jPanel2Layout.setVerticalGroup(
            jPanel2Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(jPanel2Layout.createSequentialGroup()
                .addGap(38, 38, 38)
                .addGroup(jPanel2Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                    .addComponent(jLabel2)
                    .addComponent(username, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))
                .addGap(18, 18, 18)
                .addGroup(jPanel2Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                    .addComponent(jLabel3)
                    .addComponent(password, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))
                .addGap(18, 18, 18)
                .addGroup(jPanel2Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                    .addComponent(jLabel4)
                    .addComponent(unitcode1, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))
                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.UNRELATED)
                .addGroup(jPanel2Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                    .addComponent(jLabel5)
                    .addComponent(unitName, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))
                .addGap(26, 26, 26)
                .addGroup(jPanel2Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                    .addComponent(login)
                    .addComponent(cancel))
                .addContainerGap(109, Short.MAX_VALUE))
        );

        javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
        getContentPane().setLayout(layout);
        layout.setHorizontalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(layout.createSequentialGroup()
                .addContainerGap()
                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                    .addComponent(jPanel1, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
                    .addComponent(jPanel2, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
                .addContainerGap())
        );
        layout.setVerticalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(layout.createSequentialGroup()
                .addContainerGap()
                .addComponent(jPanel1, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addGap(18, 18, 18)
                .addComponent(jPanel2, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
                .addContainerGap())
        );

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

    private void formWindowOpened(java.awt.event.WindowEvent evt) {                                  
        // TODO add your handling code here:
        unitName.setText(unitname);
    }                                 

    private void unitcode1FocusGained(java.awt.event.FocusEvent evt) {                                      
        // TODO add your handling code here:
        //  unitPop p=new unitPop();

        //
        //   p.setVisible(true);
    }                                     

    private void unitcode1MouseClicked(java.awt.event.MouseEvent evt) {                                       
        // TODO add your handling code here:
        unitPop p=new unitPop();

        //
        p.setVisible(true);
    }                                      

    private void loginActionPerformed(java.awt.event.ActionEvent evt) {                                      
        // TODO add your handling code here:
        try {
            usercredentials();

        } catch (Exception E) {
            JOptionPane.showMessageDialog(rootPane, "Error" + E);
        }
    }                                     

    private void usernameActionPerformed(java.awt.event.ActionEvent evt) {                                         
        // TODO add your handling code here:
    }                                        
    public boolean usercredentials() {
        try {
             usern = username.getText();
             pass = password.getText();
            if ((usern.trim().length() != 0) && (pass.trim().length() != 0)) {

                d.setUserName(usern);
                d.setUserPassword(pass);
                rset = d.validation();
                if (rset.next()) {
                    JOptionPane.showMessageDialog(null, "logged in ");
                } else {
                    JOptionPane.showMessageDialog(null, " Wrong UserName / Password");
                }

            } else {
                JOptionPane.showMessageDialog(null, " Error! Username /Password credentials missing");
            }
        } catch (Exception e) {
            JOptionPane.showMessageDialog(rootPane, e);
        }
        return true;
    }

    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.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (InstantiationException ex) {
            java.util.logging.Logger.getLogger(login.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (IllegalAccessException ex) {
            java.util.logging.Logger.getLogger(login.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (javax.swing.UnsupportedLookAndFeelException ex) {
            java.util.logging.Logger.getLogger(login.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().setVisible(true);
            }
        });
    }
    // Variables declaration - do not modify                     
    private javax.swing.JButton cancel;
    private javax.swing.JLabel jLabel1;
    private javax.swing.JLabel jLabel2;
    private javax.swing.JLabel jLabel3;
    private javax.swing.JLabel jLabel4;
    private javax.swing.JLabel jLabel5;
    private javax.swing.JPanel jPanel1;
    private javax.swing.JPanel jPanel2;
    private javax.swing.JButton login;
    private javax.swing.JPasswordField password;
    private javax.swing.JTextField unitName;
    private javax.swing.JTextField unitcode1;
    private javax.swing.JTextField username;
    // End of variables declaration                   
}

here is the jlist window code

/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */
package hr.forms;

import hr.HrUnits;
import javax.swing.DefaultListModel;
import hr.Sec_Users;
import hr.departments;
import java.awt.Toolkit;
import java.awt.event.WindowEvent;
import java.sql.Connection;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.swing.JOptionPane;
import hr.forms.login;

public class unitPop extends javax.swing.JFrame {

HrUnits d=new HrUnits ();
  ResultSet rset;
    Connection conn = null;
    Statement stmt = null;
    String query;
 
    public unitPop() {
        initComponents();       
        
        fillList();
    }
public void fillList(){
try{
 DefaultListModel m= new DefaultListModel();

rset= d.getlist(); //getlist function just select all records from the unitcode table thats it and return reselt set if you want get get list code i can provide
while(rset.next()){
String code= rset.getString("UNIT_CODE");
m.addElement(code); // it just retrieve all the unit codes and add in the jlist
}
list.setModel(m);

}catch(Exception e){
JOptionPane.showMessageDialog(rootPane, e);
} 

}  
public void close() {

        WindowEvent winClosingEvent = new WindowEvent(this, WindowEvent.WINDOW_CLOSING);
        Toolkit.getDefaultToolkit().getSystemEventQueue().postEvent(winClosingEvent);

    }
    @SuppressWarnings("unchecked")
    // <editor-fold defaultstate="collapsed" desc="Generated Code">                          
    private void initComponents() {

        jScrollPane1 = new javax.swing.JScrollPane();
        list = new javax.swing.JList();
        jButton1 = new javax.swing.JButton();

        setTitle("Select Unit Code");

        list.setBackground(new java.awt.Color(204, 204, 204));
        list.setSelectionMode(javax.swing.ListSelectionModel.SINGLE_SELECTION);
        jScrollPane1.setViewportView(list);

        jButton1.setText("Select");
        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)
            .addComponent(jScrollPane1, javax.swing.GroupLayout.DEFAULT_SIZE, 400, Short.MAX_VALUE)
            .addGroup(layout.createSequentialGroup()
                .addComponent(jButton1)
                .addGap(0, 0, Short.MAX_VALUE))
        );
        layout.setVerticalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(layout.createSequentialGroup()
                .addComponent(jScrollPane1, javax.swing.GroupLayout.PREFERRED_SIZE, 279, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
                .addComponent(jButton1))
        );

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

    private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) {                                         
        // TODO add your handling code here:

               String query="select unit_name from unitcodeInfoo where unitcode='" + jlist.getSelectedItem().toString(); + "'";
  rset=stmt.executeQuery(query);
  if(rset.next()){
  _Name=rset.getString("unit_name");// after this line tell me something which closed this form and and set value the of _Name to Unit Name TextField in the login form . 

//Please write some code here
 this.setVisible(false);   // this will close jlist form and go back to login form but i can not assign value to Unit Name text Field using this approach
        
    }                                        

    
    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(unitPop.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (InstantiationException ex) {
            java.util.logging.Logger.getLogger(unitPop.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (IllegalAccessException ex) {
            java.util.logging.Logger.getLogger(unitPop.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (javax.swing.UnsupportedLookAndFeelException ex) {
            java.util.logging.Logger.getLogger(unitPop.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() {
                unitPop p= new unitPop();
                
                p.setVisible(true);
            }
        });
    }
    // Variables declaration - do not modify                     
    private javax.swing.JButton jButton1;
    private javax.swing.JScrollPane jScrollPane1;
    private javax.swing.JList list;
    // End of variables declaration                   
}

[Azeem Rathore]

by the way usercredentials() function used in the login function isnot completed yet i have not added validation for unit code and unit name

[Khuzema Dharwala]

Hi Azeem, I would suggest some modifications in your code.

In unitPop class

public class unitPop extends javax.swing.JFrame{  
login ln;
HrUnits d=new HrUnits ();  
  ResultSet rset;  
    Connection conn = null;  
    Statement stmt = null;  
    String query;  
   
public unitPop(login l) {
     this.ln=l;	
        initComponents();         
        fillList();  
    }

Then inside the unitcode1MouseClicked method

private void unitcode1MouseClicked(java.awt.event.MouseEvent evt) {                                         
        // TODO add your handling code here:  
        unitPop p=new unitPop(this);  
  
        //  
        p.setVisible(true);  
    }           

And finally inside jButton1ActionPerformed method

private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) {                                           
        // TODO add your handling code here:  
  
     String query="select unit_name from unitcodeInfoo where unitcode='" + jlist.getSelectedItem().toString(); + "'";  
  rset=stmt.executeQuery(query);  
  if(rset.next()){  
  _Name=rset.getString("unit_name");// after this line tell me something which closed this form and and set value the of _Name to Unit Name TextField in the login form .   
 ln.unitName.setText(_Name);
//Please write some code here  
 this.setVisible(false);   // this will close jlist form and go back to login form but i can not assign value to Unit Name text Field using this approach  
          
    }   

[Azeem Rathore]

Thanks alot brother it is solved now you saved meeeeeeeeeeeee
many many thanks