Creating a 3 tiered model application

Question

Really, what i am looking for here is a bit of advice on the best way to achieve somthing. Lets say i have a class A. In this class i have created GUI code and a few methods at the bottom. In this GUI application i have a text field and a password field. Now the idea is to put my methods into their own class, so that my class A only contains GUI code. But i cant think of the most logical way to do this. At the moment, if i do create a new class for my methods, the process will be:
class A will call the methods class for the submit method.
The submit method will call class A for the inputs in the text and password fields.
class A will send these inputs back to the method in my methods class.
The methods class will carry out this method and the pass back the result to class A.
Seems very back and forth. Whats the best way to deal with a situation like this?

Answer 1

import java.awt.Container;
import java.awt.GridBagConstraints;
import java.awt.GridBagLayout;
import java.awt.Insets;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.util.ArrayList;
import java.awt.*;
import javax.swing.JButton;
import javax.swing.JDialog;
import javax.swing.JLabel;
import javax.swing.JOptionPane;
import javax.swing.JTextField;
import javax.swing.*;
public class Login extends JDialog implements ActionListener
ArrayList personsList;
PersonDAO pDAO;
JLabel userName, passWord;
JTextField userName1;
JPasswordField passWord1;
JButton jbnClear, jbnSubmit, jbnCancel;
String userName2, passWord2;
Container cPane;
public Login(JFrame father) {
super(father);
createGUI();
userName2  = "";
passWord2   = "";
personsList = new ArrayList();
pDAO = new PersonDAO();     
public void createGUI(){
cPane = getContentPane();
setLayout(new GridBagLayout());
//Arrange components on contentPane and set Action Listeners to each JButton
arrangeComponents();
setSize(210,170);
setTitle("Login");
setResizable(false);
setVisible(true);
setDefaultCloseOperation(JDialog.DISPOSE_ON_CLOSE);
public void arrangeComponents(){
userName = new JLabel("Username");
passWord = new JLabel("Password");
userName1   = new JTextField(20);
passWord1   = new JPasswordField(20);
jbnClear  = new JButton("Clear");
jbnSubmit = new JButton("Submit");
jbnCancel = new JButton("Cancel");
GridBagConstraints gridBagConstraintsx01 = new GridBagConstraints();
gridBagConstraintsx01.gridx = 0;
gridBagConstraintsx01.gridy = 0;
gridBagConstraintsx01.insets = new Insets(5,5,5,5);
cPane.add(userName, gridBagConstraintsx01);
GridBagConstraints gridBagConstraintsx02 = new GridBagConstraints();
gridBagConstraintsx02.gridx = 1;
gridBagConstraintsx02.insets = new Insets(5,5,5,5);
gridBagConstraintsx02.gridy = 0;
gridBagConstraintsx02.gridwidth = 2;
gridBagConstraintsx02.fill = GridBagConstraints.BOTH;
cPane.add(userName1, gridBagConstraintsx02);
GridBagConstraints gridBagConstraintsx03 = new GridBagConstraints();
gridBagConstraintsx03.gridx = 0;
gridBagConstraintsx03.insets = new Insets(5,5,5,5);
gridBagConstraintsx03.gridy = 1;
cPane.add(passWord, gridBagConstraintsx03);
GridBagConstraints gridBagConstraintsx04 = new GridBagConstraints();
gridBagConstraintsx04.gridx = 1;
gridBagConstraintsx04.insets = new Insets(5,5,5,5);
gridBagConstraintsx04.gridy = 1;
gridBagConstraintsx04.gridwidth = 2;
gridBagConstraintsx04.fill = GridBagConstraints.BOTH;
cPane.add(passWord1, gridBagConstraintsx04);
GridBagConstraints gridBagConstraintsx09 = new GridBagConstraints();
gridBagConstraintsx09.gridx = 0;
gridBagConstraintsx09.gridy = 4;
gridBagConstraintsx09.insets = new Insets(5,5,5,5);
cPane.add(jbnClear, gridBagConstraintsx09);
GridBagConstraints gridBagConstraintsx10 = new GridBagConstraints();
gridBagConstraintsx10.gridx = 1;
gridBagConstraintsx10.gridy = 4;
gridBagConstraintsx10.insets = new Insets(5,5,5,5);
cPane.add(jbnSubmit, gridBagConstraintsx10);
GridBagConstraints gridBagConstraintsx11 = new GridBagConstraints();
gridBagConstraintsx11.gridx = 1;
gridBagConstraintsx11.gridy = 5;
gridBagConstraintsx11.insets = new Insets(5,5,5,5);
cPane.add(jbnCancel, gridBagConstraintsx11);
jbnClear.addActionListener(this);
jbnSubmit.addActionListener(this);
jbnCancel.addActionListener(this);
public void actionPerformed (ActionEvent e){
if (e.getSource() == jbnClear){
clear();
else if (e.getSource() == jbnSubmit){               
Submit();
else if (e.getSource() == jbnCancel){               
cancel();
String getUsername() {
return userName1.getText();
String getPassword() {
return new String(passWord1.getPassword());
public void Submit(){
userName2 = getUsername();
passWord2 = getPassword();
PersonInfo person = new PersonInfo(userName2, passWord2);
if(userName2.equals("") || passWord2.equals("")){
JOptionPane.showMessageDialog(null, "Please complete all fields.");
else
pDAO.loginPerson(person);
public void clear(){
userName1.setText("");
passWord1.setText("");
personsList.clear();
public void cancel(){
this.dispose();
}At the moment i am concentrating on the Submit method. I create a new class for it and pass the class all references to other classes i need to use.
import java.util.ArrayList;
import javax.swing.*;
public class LogRegMethods
JFrame jf = new JFrame();
ArrayList personsList = new ArrayList();
PersonDAO pDAO = new PersonDAO();
Login log = new Login(jf);
String userName2, passWord2;
public void Submit(){
userName2 = log.getUsername();
passWord2 = log.getPassword();
PersonInfo person = new PersonInfo(userName2, passWord2);
if(userName2.equals("") || passWord2.equals("")){
JOptionPane.showMessageDialog(null, "Please complete all fields.");
else
pDAO.loginPerson(person);
}An then i change my Login class by adding
          LogRegMethods lrM = new LogRegMethods();and
     else if (e.getSource() == jbnSubmit){               
                   lrM.Submit();
             }See, its just very back and forth. I am trying to understand what happens to JTextFields at runtime. The way i have it at the moment, it frezzes when i click on the Login button. I just need advice on how i can clean it up.