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Swing applet with a JTextField asking user for a password

Posted on 2003-10-21
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Last Modified: 2013-11-23
Hi,
I have to Create a Swing applet that asks a user to enter a password into a JTextField and to then press [Enter].
Compare the password to "Rosebud"; if it marches, display "Access Granted", if not display "Access Denied.

I tried to write a program but everytime I run it, whenever I enter the correct password or the wrong one it comes out as "access denied".

Here is my code: (Hope you can help)

import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
public class JPasswordA extends JApplet implements ActionListener
{
      JLabel greeting = new JLabel("Please, enter password");
      Font bigFont = new Font("TimesRoman", Font.ITALIC, 24);
      JButton pressMe = new JButton("Press ME");

      JTextField answer = new JTextField("",10);
      FlowLayout flow = new FlowLayout();

      public void init()
      {
            greeting.setFont(bigFont);
            Container con = getContentPane();
            con.add(greeting);
            con.setLayout(flow);
            con.add(answer);
            con.add(pressMe);
            pressMe.addActionListener(this);
            answer.addActionListener(this);
            answer.requestFocus();
      }
      public void actionPerformed(ActionEvent thisEvent)
      {
            Object source = thisEvent.getSource();
                  if(source == ("Rosebud"))
                  {
                  String name = answer.getText();
                  System.out.println("Access granted");
            }
                  else if(source instanceof JTextField);
                  {
                        String name = answer.getText();
                        System.out.println("Access denied");
                  }
            }
      }
0
Comment
Question by:stdebernardi
  • 2
3 Comments
 
LVL 9

Expert Comment

by:yongsing
ID: 9596611
The following will work.

public void actionPerformed(ActionEvent thisEvent)
{
    Object source = thisEvent.getSource();
    if (source instanceof JTextField)
    {
          String name = answer.getText();
          if (name.equals("Rosebud")) {
              System.out.println("Access granted");
          }
          else
          {
              System.out.println("Access denied");
          }
    }
}

0
 
LVL 9

Accepted Solution

by:
yongsing earned 150 total points
ID: 9596646
If you want the checking to be done when either the Enter key is pressed or the button is clicked, then the following code will do:

public void actionPerformed(ActionEvent thisEvent)
{
     String name = answer.getText();
     if (name.equals("Rosebud")) {
         System.out.println("Access granted");
     }
     else
     {
         System.out.println("Access denied");
     }
}


By the way, you should use a JPasswordField instead. This component will display the characters you enter as *.
0
 

Author Comment

by:stdebernardi
ID: 9596775
That's great.
Thank you so much.

I thought about using a JPasswordField but the requirement was a JTextField, I don't know why, a JPasswordField would have been more realistic. Oh well.

Thanks again.
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