ButtonHandler issue

[Dmitri Mayer]

When we use
public class ButtonHandler implements ActionListener
in a separate class file to get the userid and password, we'd like to know if the login was successful. We want to create a boolean class variable success. But whenever we try to move control from the login class to the ButtonHandler class, success returns before ActionListener is run. What should we do?

[Michael Dunn]

>What should we do?

Hard to say without seeing any code.

Here's something to play around with - it's rough - but it might give you a
couple of ideas

import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
class Testing extends JFrame
{
  JFrame mainFrame;
  JLabel lbl = new JLabel("Please Login");
  public Testing()
  {
    mainFrame = this;
    setLocation(400,300);
    setSize(250,100);
    setDefaultCloseOperation(EXIT_ON_CLOSE);
    JPanel jp = new JPanel(new GridLayout(2,1));
    JButton btn = new JButton("Log in");
    btn.addActionListener(new ButtonHandler());
    jp.add(lbl);
    jp.add(btn);
    getContentPane().add(jp);
  }
  public static void main(String[] args){new Testing().setVisible(true);}
  class ButtonHandler implements ActionListener
  {
    public void actionPerformed(ActionEvent ae)
    {
      setVisible(false);
      new LoginForm();
    }
    class LoginForm extends JDialog
    {
      JTextField user = new JTextField(10);
      JTextField password = new JTextField(10);
      JButton ok = new JButton("OK");
      public LoginForm()
      {
        setModal(true);
        setDefaultCloseOperation(DO_NOTHING_ON_CLOSE);
        setSize(250,100);
        setLocation(400,300);
        getContentPane().setLayout(new GridLayout(2,1));
        JPanel top = new JPanel(new GridLayout(2,2));
        top.add(new JLabel("User: "));
        top.add(user);
        top.add(new JLabel("Password: "));
        top.add(password);
        JPanel bottom = new JPanel();
        bottom.add(ok);
        ok.addActionListener(new ActionListener(){
          public void actionPerformed(ActionEvent ae){
            if(user.getText().equals("joe") && password.getText().equals("java"))
            {
              lbl.setText("Login successful");
            }
            else lbl.setText("Login failed");
            mainFrame.setVisible(true);
            dispose();}});
        getContentPane().add(top);
        getContentPane().add(bottom);
        setVisible(true);
      }
    }
  }
}