Log in stress

[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(""); 
		} 
	} 
}