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[eclair]

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("");
}
}

}

[axion_sa]

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 :).
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("");
}
}
}