e394. setting a filter on a logger handler.txt

这里面包含了一百多个JAVA源文件

A handler automatically filters messages based on a log level. For other types of filtering, you can set your own custom filter on a handler. 
    // Create a handler
    ConsoleHandler handler = new ConsoleHandler();
    
    // Set the filter
    handler.setFilter(new Filter() {
        public boolean isLoggable(LogRecord record) {
            // return true if the record should be logged;
            // false otherwise.
            return true;
        }
    });
    
    // Add the handler to a logger
    Logger logger = Logger.getLogger("com.mycompany");
    logger.addHandler(handler);