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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.

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  1. 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 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:

  2. 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 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"));
        }
    }

    The output printed on log.txt is shown below.
    Output:

References:




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