The getLogger() method of java.util.logging.LogManager is used to get the specified Logger in this LogManager instance. This Logger must be a named Logger. This method will get this Logger in this LogManager if it exists. If it does not exists, then this method returns null.
Syntax:
public Logger getLogger(Logger logger)
Parameters: This method accepts a parameter logger which is the name of the Logger to be get in this LogManager instance.
Return Value: This method returns the name of this Logger in this LogManager if it exists. If it does not exists, then this method returns null.
Below programs illustrate getLogger() method:
// Java program to illustrate// LogManager getLogger() method import java.util.logging.*;import java.util.*; public class GFG { public static void main(String[] args) { // Create LogManager object LogManager logManager = LogManager.getLogManager(); String LoggerName = "GFG"; Logger logger = Logger.getLogger(LoggerName); logManager.addLogger(logger); System.out.println("\nList of Logger Names: "); Enumeration<String> listOfNames = logManager.getLoggerNames(); while (listOfNames.hasMoreElements()) System.out.println(listOfNames.nextElement()); System.out.println( "\nGet Logger Name " + LoggerName + ": " + logManager.getLogger(LoggerName)); LoggerName = "Geeks"; System.out.println( "\nGet Logger Name " + LoggerName + ": " + logManager.getLogger(LoggerName)); }} |
Output:
List of Logger Names: GFG global Get Logger Name GFG: java.util.logging.Logger@1540e19d Get Logger Name Geeks: null
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