JTextField limiting character amount input and accepting numeric only

Question

here\'s the code that i have on how to limit the character input length

class JTextFieldLimit extends PlainDocument {
  private int limit;
  // optional uppe         


        

Answer 1

public static boolean validateInt(String txt) {

    String regx = "^[(0-9),;]+$";
    Pattern pattern = Pattern.compile(regx, Pattern.CASE_INSENSITIVE);
    Matcher matcher = pattern.matcher(txt);
    boolean b = matcher.find();
    return b;

}