Java equivalent to C# TextBox TextChanged event

Question

in C# there is an event for textboxes as follows

private void fooText_TextChanged(object sender, EventArgs e)
{
    //do something 
}

the

Answer 1

For Swing, If you wanted to be notified after the text component's text had changed, you'd use a DocumentListener that was added to the JTextComponent's Document. e.g.,

  JTextField myField = new JTextField();

  myField.getDocument().addDocumentListener(new DocumentListener() {

     public void removeUpdate(DocumentEvent e) {
        // TODO add code!

     }

     public void insertUpdate(DocumentEvent e) {
        // TODO add code!

     }

     public void changedUpdate(DocumentEvent e) {
        // TODO add code!

     }
  });

If on the other hand, you wanted to check text before it has been committed to the text component, you'd add a DocumentFilter to the JTextComponent's Document.