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Thread: Password Array

  1. #1
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    Default Password Array

    My assignment is to create a password validation applet, that compares user input to a specified set of passwords stored in an array.
    For some reason, no matter what I type in, it gives me the error saying the password is incorrect. I'm not sure why this is, any help would be much appreciated.
    import javax.swing.*;
    import java.awt.*;
    import java.awt.event.*; 
     
    public class Password extends JApplet implements ActionListener
    {
    	protected String pass;
    	protected Container con = getContentPane();
    	protected Font fntHeading = new Font("Times Roman", Font.ITALIC, 20);
    	protected JLabel labelGreeting = new JLabel("Enter Password (and click OK):");
    	protected JTextField txtPassword = new JTextField("", 10);
    	protected JButton btnOk = new JButton("OK");
    	protected JTextField txtAccess = new JTextField("Access Granted");
    	protected JTextField txtDenied = new JTextField
                                          ("Access Denied; Please re-enter a valid password");
    	String [] Password = {"rosebud", "redrum", "jason", "surrender", "dorothy"};
    	public void init()
    	{
    		FlowLayout layout = new FlowLayout();
    		con.setLayout(layout);
    		labelGreeting.setFont(fntHeading);
    		con.add(labelGreeting);
    		con.add(txtPassword);
    		con.add(btnOk);
    		btnOk.addActionListener(this);		
    	}
    	public void actionPerformed(ActionEvent authenticate) 
    	{
    		pass = txtPassword.getText();
    		if (pass == Password[0] || pass == Password[1] || pass == Password[2] 
                                                              || pass == Password[3] || pass == Password[4])
    			con.add(txtAccess);
    		else
    			con.add(txtDenied);
    		con.validate();
    	}
    }

    Also, from the instructions, the user is supposed to also be able to press enter in order to access the actionevent..... however I couldn't really find anywhere that specified how to do such a thing, and nothing happens when I press enter, I assume it's because I haven't created an eventlistener for it. Thank you.


  2. #2
    Crazy Cat Lady KevinWorkman's Avatar
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    Default Re: Password Array

    Don't use == when comparing Strings. The equals method just compares whether two variables contain the same instance. Use the equals() method to compare the actual contents instead.
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    Default Re: Password Array

    It's funny, I was thinking that about 6 hours ago and totally forgot that equals() method was a thing.
    Thank you much.

    Nothing on about adding an enter key actionlistener though? >.<

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    Default Re: Password Array

    Thank you!
    I guess I was googling the wrong stuff.

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    Default Re: Password Array

    how might one go about comparing strings with capitols to strings with non-capitols.

    For example according to the instructions the Rosebud or RoSeBuD or any variation there of should be able to grant access. Not just all lowercase rosebud.

  7. #7
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    Default Re: Password Array

    Take a look at the String API: String (Java Platform SE 7 )
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