Re: JTextField setText() does nothing

From:

Knute Johnson <nospam@rabbitbrush.frazmtn.com>

Newsgroups:

comp.lang.java.programmer

Date:

Sat, 24 Nov 2007 09:29:07 -0800

Message-ID:

<EbZ1j.111$_%4.75@newsfe15.lga>

jonasmin@gmail.com wrote:

I have problem with setting the JTextField text. here you see some of
my code:

if (in1.getText().length() > 10){
JOptionPane.showMessageDialog(null, "Error", "Error",
JOptionPane.WARNING_MESSAGE);
in1.setText("");
}

in1 - JTextField. But when i axecute the program it does nothing. It
shows the WARNING_MESSAGE, but it does nothing with text. where can be
the problem?

JOptionPane.showMessageDialog is modal so the in1.setText() won't get
executed until the dialog is closed.

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;

public class test {
     public static void main(String[] args) {
         EventQueue.invokeLater(new Runnable() {
             public void run() {
                 JFrame f = new JFrame("test");
                 f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
                 final JTextField tf = new JTextField("Hello World");
                 f.add(tf,BorderLayout.CENTER);
                 JButton b = new JButton("Erase The Text");
                 b.addActionListener(new ActionListener() {
                     public void actionPerformed(ActionEvent ae) {
                       JOptionPane.showMessageDialog(
                          null,"Error","Error",
                          JOptionPane.WARNING_MESSAGE);
                         tf.setText("");
                     }
                 });
                 f.add(b,BorderLayout.SOUTH);
                 f.pack();
                 f.setVisible(true);
             }
         });
     }
}

--

Knute Johnson
email s/nospam/knute/