Key typed event not working for the first key typed. java

Question

The following is code block, where i have been trying to validate jFormatedTextFeild. When a key is typed (any key) code block does seem to execute for the first key typed. But works fine for second key typed ! Please help me :(

private void jFormattedTextField_ByingPriceKeyTyped(KeyEvent evt) {  
    System.out.println("key typed action ");
    String checking = jFormattedTextField_ByingPrice.getText();
    Pattern ptrn = Pattern.compile("[A-Z,a-z,&%$#@!()*^]");
    Matcher match = ptrn.matcher(checking);
    if(match.find()){
       txtPriceMessage.setVisible(true); 
       //text field which contains the message does not appears 
       //for first key typed only it appears when second key is typed.                 
    } else { 
        txtPriceMessage.setVisible(false);
    }
}

Answer 1

Use a DocumentFilter to filter the values going to a text component in real time, that's what it's design for. Take a look at these examples, there's even a PatternFilter for using with regular expressions...

For post validation, use a InputVerifier