Logger setParent() method in Java with Examples

Last Updated : 26 Mar, 2019

setParent() method of a Logger class used to set the parent Logger of this current Logger.The parent Logger we want to set is passed as a parameter. LogManager use this method to update a Logger when the namespace changes. Syntax:

public void setParent(Logger parent)

Parameters: This method accepts one parameter parent which represents the new parent logger. Return value: This method returns nothing. Exception: This method throws SecurityException if a security manager exists and if the caller does not have LoggingPermission("control"). Below programs illustrate the setParent() method: Program 1:

Java

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

import java.util.logging.*;

public class GFG {

    public static void main(String[] args)
    {

        // Create a logger1 using getLogger()
        Logger logger1
            = Logger.getLogger("com.java.core");

        // Assign other package to logger
        Logger logger2
            = Logger
                  .getLogger("com.java.core.api");

        // Set logger1 as parent to logger2
        logger2.setParent(logger1);

        // Print parent name
        System.out.println("logger2 parent name = "
                           + logger2
                                 .getParent()
                                 .getName());
    }
}

Output: The output printed on console of Eclipse is shown below-

Program 2:

Java

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

import java.util.logging.*;

public class GFG {

    public static void main(String[] args)
    {

        // Create a logger1 using getLogger()
        Logger logger1
            = Logger.getLogger(GFG.class.getName());

        // Assign other package to logger
        Logger logger2
            = Logger
                  .getLogger(String.class.getName());

        // Set logger2 as parent to logger1
        logger1.setParent(logger2);

        // Print parent name
        System.out.println("logger1 parent name = "
                           + logger1
                                 .getParent()
                                 .getName());
    }
}