JTEXTAREA COLUMNS RESTRICTIONS

Question

Hello,
I'd like to block a jTextArea and avoid users to introduce more than 5 characters .. how can i do it?
thanks

Answer 1

Hello,
Funny. I answered to a similar question today.
public class TestTextArea {
     public static void main(String[] args) {
          final JFrame frame = new JFrame("Test");
          frame.addWindowListener(new WindowAdapter() {
               public void windowClosing(WindowEvent e) {
                    System.exit(0);
          JTextArea textArea = new JTextArea(new SmallDocument());
          frame.setContentPane(textArea);
          frame.setSize(300, 300);
          SwingUtilities.invokeLater(new Runnable() {
               public void run() {
                    frame.show();
     private static class SmallDocument extends PlainDocument {
          public void insertString(int offs, String str, AttributeSet a) throws BadLocationException {
               if (offs >= 5) return;
               super.insertString(offs, str, a);
}There may be a much simplier solution but at least it does the trick.