User Name/Password class for MySQL -- it almost works ... almost

Question

I'm working on creating a user name/password class called Login that will get the information that is required to log into a MySQL database (This program is not an applet, by the way).
In brief this class does following:
* It creates a JFrame with JTextFields and a JPasswordField and a login button. All compents have ActionListener.
* I am able to read the info from the fields (I tested this using System.out.println)
* Another program calls this Login class (see code at end of post)
I want the program to close the frame (I figured that out) and return the values to the calling program. I can't figure out how to have it return a cat string ( of "host|port|username|password" ). If this was one large piece of java source code, it'd be a piece of cake, but the code is broken into several java source components and I'm trying to figure out how to get the ActionListener to return the string.
One web page mentioned using an ejector but haven't been able to find any information about that. Another thought was maybe putting some kind of code in the windowClosing event for the Login class.
Ex:
  public void windowClosing(WindowEvent e)
     setVisible(false);
     dispose();
     // return value to calling function somehow
  }Any help would be greatly appreciated. I'm teaching myself this so I'm sure there are better ways to do the JFrame formatting, but here's the code anyway. I'll post the additional changes (in context) when I get a working version of this.
//Login.java
import java.awt.*;
import java.awt.event.*;
import java.lang.Object;
import java.sql.Connection;
import java.sql.DriverManager;
import javax.swing.*;
import javax.swing.border.TitledBorder;
public class Login extends JFrame implements ActionListener
   JTextField serverHost;
   IntTextField port;
   JTextField userName;
   JPasswordField password;
   JButton login;
   Canvas canvas;
   String ServerHost_String;
   String Port_String;
   String UserName_String;
   String Password_String;
   String Login_String;
   Font ssb10 = new Font("Sans Serif", Font.BOLD,10);
   Font hb30 = new Font("Helvetica", Font.BOLD,30);
   Integer rc;
   //public void init()
   public Login()
      // Set up buttons
      login = new JButton("Login");
      serverHost = new JTextField("localhost",10);
      port = new IntTextField(3306, 4);
      userName = new JTextField("root",10);
      password = new JPasswordField(10);
      // Draw Screen
      Canvas horizontal_spacer1 = new Horizontal_Spacer(420,15);
      Canvas horizontal_spacer2 = new Horizontal_Spacer(420,15);
      Canvas horizontal_spacer3 = new Horizontal_Spacer(420,15);
      Canvas horizontal_spacerA = new Horizontal_Spacer(100,45);
      Canvas horizontal_spacerB = new Horizontal_Spacer(100,45);
      Canvas vertical_spacer1 = new Vertical_Spacer();
      Canvas vertical_spacer2 = new Vertical_Spacer();
      Canvas vertical_spacerA = new Vertical_Spacer();
      Canvas vertical_spacerB = new Vertical_Spacer();
       * Top
      canvas = new Top_Logo();
      JPanel top = new JPanel();
      top.add(canvas);
      //top.add(horizontal_spacer1);
      add(BorderLayout.NORTH,top);
       * Middle
      Box p1 = Box.createHorizontalBox();
      Box p2 = Box.createHorizontalBox();
      Box p3 = Box.createHorizontalBox();
      JPanel bp = new JPanel();
      JLabel rbp = new JLabel();
      p1.setFont(ssb10);
      p2.setFont(ssb10);
      p3.setFont(ssb10);
      p1.setAlignmentX(Component.LEFT_ALIGNMENT);
      bp.setAlignmentX(Component.LEFT_ALIGNMENT);
      p3.setAlignmentX(Component.LEFT_ALIGNMENT);
      rbp.setLayout(new BoxLayout(rbp,BoxLayout.X_AXIS));
      rbp.setBorder(new TitledBorder("Connection to MySQL Server Instance"));
      JLabel lString = new JLabel("Server Host: ");
      lString.setFont(ssb10);
      // Setup server Host and Port JPanel
      p1.add(lString);
      p1.add(serverHost);
      lString = new JLabel("  Port: ");
      lString.setFont(ssb10);
      p1.add(lString);
      p1.add(port);
      // Setup username JPanel
      lString = new JLabel("Username:    ");
      lString.setFont(ssb10);
      p2.add(lString);
      p2.add(userName);
      // Setup password JPanel
      lString = new JLabel("Password:    ");
      lString.setFont(ssb10);
      p3.add(lString);
      p3.add(password);
      // Draw the big Jpanel
      //bp.add(horizontal_spacerA);
      bp.add(p1);
      bp.add(p2);
      bp.add(p3);
      //bp.add(horizontal_spacerB);
      rbp.add(vertical_spacerA);
      rbp.add(bp);
      rbp.add(vertical_spacerB);
      add(BorderLayout.WEST,vertical_spacer1);
      add(BorderLayout.CENTER,rbp);
      add(BorderLayout.EAST,vertical_spacer2);
      // Bottom
      JPanel bot = new JPanel();
      bot.setLayout(new BoxLayout(bot,BoxLayout.Y_AXIS));
      bot.add(horizontal_spacer2);
      bot.add(login);
      bot.add(horizontal_spacer3);
      add(BorderLayout.SOUTH,bot);
      // Draw JFrame
      setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
      setSize(420,280);
      setResizable(false);
      setVisible(true);
      // Listen for buttons being clicked
      login.addActionListener(this);
      serverHost.addActionListener(this);
      userName.addActionListener(this);
      port.addActionListener(this);
      password.addActionListener(this);
   class Horizontal_Spacer extends Canvas
      Horizontal_Spacer(int X, int Y)
         setSize(X,Y);
         setVisible(true);
   class Vertical_Spacer extends Canvas
      Vertical_Spacer()
         setSize(25,10);
         setVisible(true);
   class Top_Logo extends Canvas
      Top_Logo()
         setBackground(Color.white);
         setSize(420,65);
         setVisible(true);
      public void paint(Graphics g)
           g.setFont(hb30);
           g.drawString("MySQL Login",20,45);
   public void actionPerformed(ActionEvent event)
      Object source = event.getSource();
      ServerHost_String=serverHost.getText();
      Port_String=port.getText();
      UserName_String=userName.getText();
      Password_String=new String(password.getPassword());
      if ((ServerHost_String.compareTo("")!=0) &&
          (Port_String.compareTo("")!=0) &&
          (UserName_String.compareTo("")!=0) &&
          (Password_String.compareTo("")!=0))
           Login_String=ServerHost_String + "|" +
                        Port_String + "|" +
                        UserName_String + "|" +
                        Password_String;
           setVisible(false);
           dispose();
      public void windowClosing(WindowEvent e)
        setVisible(false);
        dispose();
//Login_Test.java
import javax.swing.*;
public class Login_Test extends JFrame
   //public void run()
   public static void main(String [] args)
      Login f = new Login();
}Doc

Answer 1

Let me get this clear.
You want a login dialog.
Some program calls the dialog and waits untile user respond
once the user press ok or cancel it reutrn the users input to the caller.
You can do this directly using JFrame
but you can do it wil JDialog if you use it as aModal dialog.
it will look like this
class LogInDialog  extends JDialog implements ActionListener{
   String value;
   public LogInDialog(){
      setModel(true);
    // This is what you invoke
    public String loadDialog(){
        setVisible(true);
        return value;
    public void actionListener(..... e){
        if (e.getSource() == bCancel)
           value = null;
        else if (e.getSource() == bOk)
           value = //generate the string
        dispose();
}