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

// Java program to demonstrate
// Logger.removeHandler() method

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");

        // Add file handler as
        // handler of logs
        logger.addHandler(filehandler);

        // Log message
        logger.info("This is Info Message ");

        // Remove file handler.
        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

// Java program to demonstrate
// Logger.addHandler() method

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
    {

        // Create a ConsoleHandler object
        ConsoleHandler handler
            = new ConsoleHandler();

        // Add console handler as
        // handler of logs
        logger.addHandler(handler);

        // Log message
        logger.info("This is Info Message ");

        // Remove consolehandler
        logger.removeHandler(handler);

        // After removing logs print message
        logger.info("Handler removed");
    }
}