Logger removeHandler() method in Java with Examples
Last Updated :
24 Jun, 2021
removeHandler() method of a Logger class is used to remove a log Handler from Logger. A Handler is a component of JVM that takes care of actual logging to the defined output writers like a file, console out etc. It returns silently if the given Handler is not found or is null.
Syntax:
public void removeHandler(Handler handler)
throws SecurityException
Parameters: This method accepts one parameter handler which represents a logging Handler.
Return value: This method returns nothing.
Exception: This method throws SecurityException if a security manager exists, this logger is not anonymous, and the caller does not have LoggingPermission(“control”).
.
Below programs illustrate the removeHandler() method:
Program 1:
Java
import java.util.logging.*;
import java.io.IOException;
public class GFG {
private static Logger logger
= Logger.getLogger(
GFG. class .getName());
public static void main(String args[])
throws SecurityException, IOException
{
FileHandler filehandler
= new FileHandler( "logs.txt" );
logger.addHandler(filehandler);
logger.info( "This is Info Message " );
logger.removeHandler(filehandler);
logger.info( "This message will "
+ "not print on filehandler" );
}
}
|
Output:
The output printed on logs.txt file is shown below-
Program 2:
Java
import java.util.logging.*;
import java.io.IOException;
public class GFG {
private static Logger logger
= Logger.getLogger(
GFG. class .getName());
public static void main(String args[])
throws SecurityException, IOException
{
ConsoleHandler handler
= new ConsoleHandler();
logger.addHandler(handler);
logger.info( "This is Info Message " );
logger.removeHandler(handler);
logger.info( "Handler removed" );
}
}
|
Output:
output printed on console output is shown below-
Reference: https://docs.oracle.com/javase/10/docs/api/java/util/logging/Logger.html#removeHandler(java.util.logging.Handler)
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