public static String obscure(String clearValue){
  if (clearValue == null || clearValue.length() == 0)   return "-";
  Obscure ob=new Obscure(clearValue);
  return ob.getObscuredValue();
}

public static String obscure ( String clearValue ) { if ( clearValue == null || clearValue . length ( ) == 0 ) return "-" ; Obscure ob = new Obscure ( clearValue ) ; return ob . getObscuredValue ( ) ; }
obscure clear value . obscure digits but last 4
