public void exception(Throwable e){
  final String msg=e.getMessage();
  log(Level.SEVERE,msg != null ? msg : "An exception occurred.",e);
}

public void exception ( Throwable e ) { final String msg = e . getMessage ( ) ; log ( Level . SEVERE , msg != null ? msg : "An exception occurred." , e ) ; }
log an exception at the ' severe ' level .
