Solved

TextListener question

Posted on 2004-08-05
7
743 Views
Last Modified: 2009-12-16
I am confused how to use the TextListener on a JTextField.

Since there is no JTextListener Interface, how can I trap every key stroke on a JTextField
by  using the TextListener?

Does any one have an example of how to do this (on a JTextField and not TextField ) or otherwise???
0
Comment
Question by:prain
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
7 Comments
 

Accepted Solution

by:
ikerasd earned 25 total points
ID: 11726647
you can use the KeyListener class and the methods keyPressed(KeyEvent e) and keyTyped(KeyEvent e)
0
 
LVL 30

Expert Comment

by:Mayank S
ID: 11726659
0
 
LVL 37

Assisted Solution

by:zzynx
zzynx earned 25 total points
ID: 11726678
As an alternative you can add a document listener to the JTextField's document:

yourTextField.getDocument().addDocumentListener( someDocListener );
0
 
LVL 37

Expert Comment

by:zzynx
ID: 11738234
>> how can I trap every key stroke on a JTextField
Just to know, why do you want that?
Is it to ignore/skip some characters typed in?
Then you should certainly use the document approach.
0
 
LVL 3

Expert Comment

by:JohnnyAffa
ID: 11741511
import java.awt.event.*;
import java.awt.*;
import javax.swing.*;

class MyFrame extends JFrame implements KeyListener
{
    JTextField textField;
     Container contentPane;

   public MyFrame()
    {
          this.setBounds(10,10,400,400);
          contentPane = this.getContentPane();
         contentPane.setLayout(null);

          textField = new JTextField();

          textField.addKeyListener(this);
          textField.setBounds(10,10,200,30);

         contentPane.add(textField);
        this.setVisible(true);
   }

     public void keyPressed(KeyEvent event)
    {
System.out.println("PRESSED : " + event.getKeyChar());
     }

     public void keyReleased(KeyEvent event)
    {
System.out.println("RELEASED : " + event.getKeyChar());
    }

      public void keyTyped(KeyEvent event)
     {
System.out.println("TYPED : " + event.getKeyChar());
     }

     public void processWindowEvent(WindowEvent event)
   {
             if ( event.getID() == WindowEvent.WINDOW_CLOSING)
                  System.exit(0);
     }


         public static void main(String args[])
      {
                     MyFrame frame = new MyFrame();
          }
}
0

Featured Post

Salesforce Has Never Been Easier

Improve and reinforce salesforce training & adoption using WalkMe's digital adoption platform. Start saving on costly employee training by creating fast intuitive Walk-Thrus for Salesforce. Claim your Free Account Now

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

Are you developing a Java application and want to create Excel Spreadsheets? You have come to the right place, this article will describe how you can create Excel Spreadsheets from a Java Application. For the purposes of this article, I will be u…
Introduction This article is the last of three articles that explain why and how the Experts Exchange QA Team does test automation for our web site. This article covers our test design approach and then goes through a simple test case example, how …
Viewers learn about the “while” loop and how to utilize it correctly in Java. Additionally, viewers begin exploring how to include conditional statements within a while loop and avoid an endless loop. Define While Loop: Basic Example: Explanatio…
Viewers learn how to read error messages and identify possible mistakes that could cause hours of frustration. Coding is as much about debugging your code as it is about writing it. Define Error Message: Line Numbers: Type of Error: Break Down…
Suggested Courses

739 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question