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 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 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()); 
    } 
} 