Question

I have a JTextPane which is bind with KeyReleased Event. My Goal is that whatever
user typed in that TextPane It will print some character.

{'I', 'N', 'V', 'A', 'L', 'I', 'D'};

Above character printed every keyReleased Event. If the user pressed any character then JTextPane Shows 'I' after next event shows ‘N’ like wise.

If I pressed one by one its working properly. But my problem is that If I typed rapidly I got the typed character.

How can I hide these characters?

KeyPressedEvent Code:

fooString is char array with 13 char.

count++; //count of event
if(evt.getKeyCode() == KeyEvent.VK_ESCAPE)
{
  int option = JOptionPane.showConfirmDialog(this, "Do you want to exit");
  if(option == JOptionPane.YES_OPTION)
  {
    System.exit(0);
  }
}
else if(evt.getKeyCode() == KeyEvent.VK_BACK_SPACE)
{
  if(this.txtPane.getText().length() != 0)
  count--;
}
else
{
  /*Get the value and show fooString value */
  try {
    String val = this.txtPane.getText();
    int rem = count % fooString.length;
    //System.out.println(val.substring(0, val.length()-1));
    txtPane.setText(val.substring(count-1, val.length()-1));
    if(rem == 0)
    rem = foolString.length;
    if(count % 26 == 0)
    {
      txtPane.setText(val.substring(0, val.length()-1) 
          + fooString[rem-1] +"\n");
      lineCount++;
      count = 0;
    }
    else
    txtPane.setText(val.substring(0, val.length()-1) + fooString[rem-1]);
  } catch (Exception ex) {
    Logger.getLogger(A.class.getName()).log(Level.SEVERE, null, ex);
  }
} 

Cheers..

Answer 1

• don’t to use KeyListener for JTextComponents

• use DocumentListener

My Goal is that whatever user typed in that TextPane It will print
some character.

• use DocumentFilter and/or (for {'I', 'N', 'V', 'A', 'L', 'I', 'D;}) with Pattern