Solved

click button to print text on a new window.

Posted on 2004-03-27
5
192 Views
Last Modified: 2010-03-31
Hi,

I'm not quite sure how write java code to print text on a new window / JOptionPane.. by clicking a button.

Thanks

Lee
0
Comment
Question by:LeeMY
  • 2
5 Comments
 
LVL 6

Accepted Solution

by:
dorothy2 earned 25 total points
ID: 10694486
iimport java.awt.*;
import java.awt.event.*;
import javax.swing.*;

public class ButtonExample extends JFrame {

   public ButtonExample() {
     // Add controls to JFrame
     Container container = this.getContentPane();
     JButton button = new JButton("Press to Continue");
     container.add(button);
     JTextField txtField = new JTextField();
     container.add(txtField);

    ButtonHandler handler = new ButtonHandler();
    listener.setTextField(txtField);
    button.addActionListener(handler);

    setSize(200, 100);
    setVisible(true);
   } // end of constructor
} // end of class

// put in same source code file
private class ButtonHandler implements ActionListener {
  private JTextField txtField;

 // pass textfield to ActionListener
  public void setTextField(JTextField field) {
      this.txtField = field;
  }

  // handle button press
  public void actionPerformed(ActionEvent event) {
     txtfield.addText("You pressed the button.");
  }

} // end of class

There are some variations. Some developers have the class containing the JFrame implement ActionListener, and put the actionPerformed method there. It's also possible to create the ActionListener class as an inner class within the JFrame subclass. This saves having to add a method to pass the TextField reference to the ActionListener.
   
Dorothy    
0
 
LVL 30

Assisted Solution

by:Mayank S
Mayank S earned 25 total points
ID: 10701417
>> how write java code to print text on a new window / JOptionPane

In the actionPerformed () method, you can use the showMessageDialog () method of JOptionPane, like:

JOptionPane.showMessageDialog ( <Parent-Frame>, <Message>, <TITLE>, JOptionPane.INFORMATION_MESSAGE ) ; // show an information message - you can use ERROR_MESSAGE, WARNING_MESSAGE, etc
0
 
LVL 30

Expert Comment

by:Mayank S
ID: 10857792
Please proceed with that recommendation.
0

Featured Post

Free Tool: Port Scanner

Check which ports are open to the outside world. Helps make sure that your firewall rules are working as intended.

One of a set of tools we are providing to everyone as a way of saying thank you for being a part of the community.

Question has a verified solution.

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

Suggested Solutions

Title # Comments Views Activity
even odd program using while loop 3 60
iterator/ListIterator approach 17 39
jboss 7.1 start up error 1 41
eclipse console opening separately 2 29
Java contains several comparison operators (e.g., <, <=, >, >=, ==, !=) that allow you to compare primitive values. However, these operators cannot be used to compare the contents of objects. Interface Comparable is used to allow objects of a cl…
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 …
This tutorial covers a step-by-step guide to install VisualVM launcher in eclipse.
This video teaches viewers about errors in exception handling.

828 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