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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