Logger exiting() method in Java with Examples

Last Updated : 28 Mar, 2019

The exiting() method of a Logger class used to Log a method return.
There are two types of exiting() method depending upon the parameters passed.

exiting(String sourceClass, String sourceMethod): This method is used to Log a method return. we need to log what method returns and this is a convenience method that can be used to log returning from a method. This method logs with the message "RETURN", log level FINER, and the given sourceMethod and sourceClass are also logged. Syntax:

public void exiting(String sourceClass,
                    String sourceMethod)

Parameters: This method accepts two parameters:

sourceClass is the name of the class that issued the logging request,
sourceMethod is the name of the method

Return value: This method returns nothing. Below program illustrate exiting(String sourceClass, String sourceMethod) method: Program 1:

Java

// Java program to demonstrate
// exiting(String, String)  method

import java.io.IOException;
import java.util.logging.FileHandler;
import java.util.logging.Level;
import java.util.logging.Logger;
import java.util.logging.SimpleFormatter;

public class GFG {

    public static void main(String[] args)
        throws SecurityException, IOException
    {

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

        // Create a file handler object
        FileHandler handler
            = new FileHandler("logs.txt");
        handler.setFormatter(new SimpleFormatter());

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

        // set Logger level()
        logger.setLevel(Level.FINER);

        // call exiting methods with class
        // name =  GFG and method name = main
        logger.exiting(GFG.class.getName(),
                       GFG.class.getMethods()[0].getName());
    }
}

The output printed on log.txg file is shown below. Output:

exiting(String sourceClass, String sourceMethod, Object result): This method is used to Log a method entry, with result object. This is a very helpful method to log entry related to a method of a class with its return value. This method logs with the message "RETURN {0}", log level FINER, and the gives sourceMethod, sourceClass, and result object is logged. Syntax:

public void exiting(String sourceClass,
                    String sourceMethod,
                    Object result)

Parameters: This method accepts three parameters:

sourceClass is the name of the class that issued the logging request,
sourceMethod is the name of the method and
Object that is being returned.

Return value: This method returns nothing. Below programs illustrate exiting(String sourceClass, String sourceMethod, Object result) method: Program 1:

Java

// Java program to demonstrate
// exiting(String, String, Object)  method

import java.io.IOException;
import java.util.logging.FileHandler;
import java.util.logging.Level;
import java.util.logging.Logger;
import java.util.logging.SimpleFormatter;

public class GFG {

    public static void main(String[] args)
        throws SecurityException, IOException
    {

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

        // Create a file handler object
        FileHandler handler
            = new FileHandler("logs.txt");
        handler.setFormatter(new SimpleFormatter());

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

        // set Logger level()
        logger.setLevel(Level.FINER);

        // set Logger level()
        logger.setLevel(Level.FINER);

        // call exiting method with class
        // name =  GFG and method name = main
        logger.exiting(GFG.class.getName(),
                       GFG.class.getMethods()[0].getName(),
                       new String("Java is Platform Independent"));
    }
}