Question

I have a Jframe class that has a login and password fields. When loggin on, i have to display informations of the person that logged in, so i have to retrieve his login from the first Jframe to make a treatment in the other one.
Here is that i made, but the login returns NULL in the second jframe:
First Jframe (login and password fields):

private void button_connectActionPerformed(java.awt.event.ActionEvent evt) {                                               
    // TODO add your handling code here:
    String x= loginField.getText();
    String y= passwordField.getText();
    AuthentificationDAO authDAO= new AuthentificationDAO();
    boolean ok_login= authDAO.verify_login(x);
    int pass= Integer.parseInt(y);
    System.out.println("password retrieved"+pass);
    boolean ok_pass=authDAO.verify_password(pass);
    System.out.println("ok pass"+ok_pass);
    if (ok_login & ok_pass)
    {
        System.out.println("Login found!");
        Enseignant e= new Enseignant();
      edu.app.persistence.Enseignant ens= new edu.app.persistence.Enseignant(x);
      //ens.setLogin(x);
        System.out.println("login SET:"+ens.getLogin());
        e.setVisible(true);
        this.setVisible(false);


    }
    else {
        System.out.println("Login NOT found!");
        JOptionPane.showMessageDialog(null, "Accourt NOT found. Please check your login or password.", "Check Login/Pass", 1);
    }

Second Jframe that will display informations of that login:

private void mauvaisFieldFocusGained(java.awt.event.FocusEvent evt) {

edu.app.persistence.Enseignant ens= new edu.app.persistence.Enseignant();
String login=ens.getLogin();
System.out.println("LOGIN EST:"+login);
StatsDAO stats= new StatsDAO();
int id=stats.get_id_from_login(login);
System.out.println("ID="+id);

}

Any idea please of how solving that problem?
Thank you very much.

Answer 1

Unless ens.login is static, this code won’t work.

You can use the MVC pattern or you can just make your second frame class extends JFrame, in order to add a login field to it..

Sonething like :

    class1 {
        class2 frame2 = new class2();
        void login(){
            String x = loginField.getText();
            edu.app.persist.teach ens= new edu.app.persist.teach(x);
            class2.setLogin(x);
        }
   }

   class2 extends JFrame{
       String login;
       String getLogin(){..}
       void setLogin(String s){..}
       .
       .
   }

I’ve used a sort of pseudocode but it should be clear enough