e392. writing log records to standard error.txt

这里面包含了一百多个JAVA源文件

To make a logger print log records on standard error, you need to add a ConsoleHandler to the logger. 
    // Create a console handler
    ConsoleHandler handler = new ConsoleHandler();
    
    // Add to logger
    Logger logger = Logger.getLogger("com.mycompany");
    logger.addHandler(handler);