loging
private String getDetailMessages(Throwable throwable){ StringBuffer buffer = new StringBuffer(); buffer.append(throwable.getMessage()).append("\n"); StackTraceElement[] stackTrace = throwable.getStackTrace(); for(StackTraceElement element : stackTrace) { if(element.getFileName().endsWith(".java")){ buffer.append("\tat ").append(element.toString()).append("\n"); } } return buffer.toString(); }