java类库详细讲解

				
				
				
				Determining If a Message Will Be Logged
				(Java Developers Almanac Example)
				
				
				
				
				
				
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				The Java Developers Almanac 1.4
				
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				    java.util.logging
				         [20 examples]
				        
				
				  
				    e386.  
				    Determining If a Message Will Be Logged
				
				See also e389 Minimizing the Impact of Logging Code.
				
				
				
				    Logger logger = Logger.getLogger("com.mycompany.MyClass");
				    
				    // Check if the message will be logged
				    if (logger.isLoggable(Level.FINEST)) {
				        logger.finest("my finest message");
				    }
				
				
				
				
				             Related Examples
				        
				
				
				
				
				e385. 
				    The Quintessential Logging Program
				
				
				
				e387. 
				    Logging a Method Call
				
				
				
				e388. 
				    Logging an Exception
				
				
				
				e389. 
				    Minimizing the Impact of Logging Code
				
				
				
				e390. 
				    Preventing a Logger from Forwarding Log Records to its Parent
				
				
				
				e391. 
				    Writing Log Records to a Log File
				
				
				
				e392. 
				    Writing Log Records to Standard Error
				
				
				
				e393. 
				    Writing Log Records Only After a Condition Occurs
				
				
				
				e394. 
				    Setting a Filter on a Logger Handler
				
				
				
				
				
				
				
				
				        See also: 
				
				    Configuration
				  
				
				
				    File Size
				  
				
				
				    Formatters
				  
				
				
				    Levels
				  
				
				
				
				
				
				
				
				
				
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