Log in stress

I am fairly new to java and I dont really know what I am doing so if someone could help me it would b great.

I am coding a login screen, where the user enters a name and password and when they press "Ok" I want a welcome message to appear. I tried this code below but keep getting 1 error.
Please help me!!

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;

public class PassWordInterface extends JFrame implements ActionListener{



private JLabel nameLabel, passWordLabel, EMCLabel;
private JTextField nameTextField, passwordTextField;
private JButton okButton, CancelButton;
private FlowLayout layout;



public PassWordInterface(){

super("Enter Password");
setBounds(200, 200, 350, 200);
GridBagLayout layout = new GridBagLayout();
GridBagConstraints constraints = new GridBagConstraints();
JPanel pane = new JPanel();
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
pane.setLayout(layout);
ImageIcon EMC = new ImageIcon("EMC.gif");

createConstraints(constraints, 0, 0, 4, 1, 0, 0);
constraints.fill = GridBagConstraints.HORIZONTAL;
constraints.anchor = GridBagConstraints.CENTER;
JLabel EMCLabel = new JLabel(EMC);
layout.setConstraints(EMCLabel, constraints);
pane.add(EMCLabel);

createConstraints(constraints, 0, 1, 1, 1, 50, 20);
constraints.fill = GridBagConstraints.NONE;
constraints.anchor = GridBagConstraints.EAST;
JLabel nameLabel = new JLabel ("Name:", JLabel.LEFT);
layout.setConstraints(nameLabel, constraints);
pane.add(nameLabel);


createConstraints(constraints, 1, 1, 2, 1, 50, 20);
constraints.fill = GridBagConstraints.HORIZONTAL;
JTextField nameTextField = new JTextField();
layout.setConstraints(nameTextField, constraints);
pane.add(nameTextField);

createConstraints(constraints, 0, 2, 1, 1, 50, 20);
constraints.fill = GridBagConstraints.NONE;
constraints.anchor = GridBagConstraints.EAST;
JLabel passWordLabel = new JLabel ("Password:", JLabel.LEFT);
layout.setConstraints(passWordLabel, constraints);
pane.add(passWordLabel);


createConstraints(constraints, 1, 2, 2, 1, 50, 20);
constraints.fill = GridBagConstraints.HORIZONTAL;
JPasswordField passwordTextField = new JPasswordField();
passwordTextField.setEchoChar('*');
layout.setConstraints(passwordTextField, constraints);
pane.add(passwordTextField);


createConstraints(constraints, 0, 3, 1, 1, 30, 40);
constraints.fill = GridBagConstraints.HORIZONTAL;
constraints.anchor = GridBagConstraints.CENTER;
JButton okButton = new JButton ("OK");
layout.setConstraints(okButton, constraints);
pane.add(okButton);
okButton.addActionListener(this);

createConstraints(constraints, 2, 3, 1, 4, 40, 40);
constraints.fill = GridBagConstraints.HORIZONTAL;
constraints.anchor = GridBagConstraints.CENTER;
JButton CancelButton = new JButton ("Cancel");
layout.setConstraints(CancelButton, constraints);
pane.add(CancelButton);
CancelButton.addActionListener(this);


setContentPane(pane);
}


private void createConstraints(GridBagConstraints gbc, int gx, int gy, int gw, int gh, int wx, int wy){

gbc.gridx = gx;
gbc.gridy = gy;
gbc.gridwidth = gw;
gbc.gridheight = gh;
gbc.weightx = wx;
gbc.weighty = wy;

}

public static void main (String args[]){

PassWordInterface test = new PassWordInterface();
test.show();
}


public void ActionPerformed(ActionEvent e)
{
if (e.getSource()==okButton)
{
JOptionPane.showMessageDialog(null, "Welcome "+ nameTextField.getText());

}

if (e.getSource()==CancelButton)
{
nameTextField.setText("");
passwordTextField.setText("");
}
}

}

While I do appreciate you're new to Java, I think you should have a look at the coding conventions on java's web-site (no offense intended).

The corrections have been commented :).

Code:

---

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;

public class PassWordInterface extends JFrame implements ActionListener {
        private JLabel nameLabel, passWordLabel, EMCLabel;
        private JTextField nameTextField;
       
        // 1 - you had this declared as a JTextField.
        private JPasswordField passwordTextField;
        private JButton okButton, CancelButton;
        private FlowLayout layout;

        public PassWordInterface() {
                super("Enter Password");
                setBounds(200, 200, 350, 200);
                GridBagLayout layout = new GridBagLayout();
                GridBagConstraints constraints = new GridBagConstraints();
               
                JPanel pane = new JPanel();
                setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
                pane.setLayout(layout);

                ImageIcon EMC = new ImageIcon("EMC.gif");
                createConstraints(constraints, 0, 0, 4, 1, 0, 0);
                constraints.fill = GridBagConstraints.HORIZONTAL;
                constraints.anchor = GridBagConstraints.CENTER;

                JLabel EMCLabel = new JLabel(EMC);
                layout.setConstraints(EMCLabel, constraints);
                pane.add(EMCLabel);
                createConstraints(constraints, 0, 1, 1, 1, 50, 20);
                constraints.fill = GridBagConstraints.NONE;
                constraints.anchor = GridBagConstraints.EAST;
               
                /*
                        2 - You're redeclared this, and as it's in a different
                        scope, you're modular variable isn't initialised.
                */
                nameLabel = new JLabel ("Name:", JLabel.LEFT);
                layout.setConstraints(nameLabel, constraints);
                pane.add(nameLabel);
                createConstraints(constraints, 1, 1, 2, 1, 50, 20);
                constraints.fill = GridBagConstraints.HORIZONTAL;
               
                // 3 - Ditto (2).
                nameTextField = new JTextField();
                layout.setConstraints(nameTextField, constraints);
                pane.add(nameTextField);
                createConstraints(constraints, 0, 2, 1, 1, 50, 20);
                constraints.fill = GridBagConstraints.NONE;
                constraints.anchor = GridBagConstraints.EAST;
               
                // 4 - Ditto (2).
                passWordLabel = new JLabel ("Password:", JLabel.LEFT);
                layout.setConstraints(passWordLabel, constraints);
                pane.add(passWordLabel);
                createConstraints(constraints, 1, 2, 2, 1, 50, 20);
                constraints.fill = GridBagConstraints.HORIZONTAL;

                // 5 - Ditto (2).
                passwordTextField = new JPasswordField();
                passwordTextField.setEchoChar('*');
                layout.setConstraints(passwordTextField, constraints);
                pane.add(passwordTextField);
                createConstraints(constraints, 0, 3, 1, 1, 30, 40);
                constraints.fill = GridBagConstraints.HORIZONTAL;
                constraints.anchor = GridBagConstraints.CENTER;
               
                // 6 - Ditto (2).
                okButton = new JButton ("OK");
                layout.setConstraints(okButton, constraints);
                pane.add(okButton);
                okButton.addActionListener(this);
                createConstraints(constraints, 2, 3, 1, 4, 40, 40);
                constraints.fill = GridBagConstraints.HORIZONTAL;
                constraints.anchor = GridBagConstraints.CENTER;
               
                // 7 - Ditto (2).
                CancelButton = new JButton ("Cancel");
                layout.setConstraints(CancelButton, constraints);
                pane.add(CancelButton);
                CancelButton.addActionListener(this);
                setContentPane(pane);
        }
       
        private void createConstraints(GridBagConstraints gbc, int gx, int gy, int gw, int gh, int wx, int wy) {
                gbc.gridx = gx;
                gbc.gridy = gy;
                gbc.gridwidth = gw;
                gbc.gridheight = gh;
                gbc.weightx = wx;
                gbc.weighty = wy;
        }
       
        public static void main (String args[]) {
                PassWordInterface test = new PassWordInterface();
                test.show();
        }
       
        // 8 - You had ActionPerformed (case sensitive).
        public void actionPerformed(ActionEvent e) {
                // 9 - Rather use the equals() method - a tad cleaner.
                if (e.getSource().equals(okButton))
                {
                        JOptionPane.showMessageDialog(null, "Welcome "+ nameTextField.getText());
                }
                // Better to use Else If & ditto (9).
                else if (e.getSource().equals(CancelButton))
                {
                        nameTextField.setText("");
                        passwordTextField.setText("");
                }
        }
}

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