The Java Developers Almanac 1.4

 
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e395. Setting the Log Level of a Logger

The log level of a logger controls the severity of messages that it will log. In particular, a log record whose severity is greater than or equal to the logger's log level is logged.

A log level can be null, in which case the level is inherited from the logger's parent.

Note: Logger handlers also have a log level. A log record must first pass the logger's log level before it is compared to the handler's log level. 

    // Get a logger
    Logger logger = Logger.getLogger("com.mycompany");
    
    // Set the level to a particular level
    logger.setLevel(Level.INFO);
    
    // Set the level to that of its parent
    logger.setLevel(null);
    
    // Turn off all logging
    logger.setLevel(Level.OFF);
    
    // Turn on all logging
    logger.setLevel(Level.ALL);

 Related Examples
e396. Getting the Log Level of a Logger
e397. Comparing Log Levels
e398. Creating a Custom Log Level

See also: Configuration    File Size    Formatters   


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