package seleniumlearn.com;
import java.util.concurrent.TimeUnit;
import org.apache.log4j.Logger;
import org.apache.log4j.PropertyConfigurator;
import org.openqa.selenium.By;
import org.openqa.selenium.WebDriver;
import org.openqa.selenium.chrome.ChromeDriver;
import org.openqa.selenium.firefox.FirefoxDriver;

public class Log4j {
  public static void main(String[] args) throws Exception {
  
  Logger logger= Logger.getLogger("LogLearning");
  PropertyConfigurator.configure("Log4j.properties");
 
  System.setProperty("org.apache.commons.logging.Log", "org.apache.commons.logging.impl.Jdk14Logger");
 

   public WebDriver driver;

  driver= new FirefoxDriver();
 

  logger.info("Firefox Opened");
  
  driver.manage().timeouts().implicitlyWait(9,TimeUnit.SECONDS);
  logger.info("Set wait for a page to load");
  
  driver.manage().window().maximize();
  logger.info("Brows maximized");

  driver.get("http://www.seleniumlearn.com");
  logger.info("Website is launched");

 // and so on.........
  
    }  

 }

Log4j Properties Code  :-
 

// Here we have defined root logger
log4j.rootLogger=INFO,CONSOLE,R,HTML,TTCC

// Here we define the appender
log4j.appender.CONSOLE=org.apache.log4j.ConsoleAppender
log4j.appender.R=org.apache.log4j.RollingFileAppender
log4j.appender.TTCC=org.apache.log4j.RollingFileAppender
log4j.appender.HTML=org.apache.log4j.FileAppender

// Here we define log file location
log4j.appender.R.File=./log/testlog.log
log4j.appender.TTCC.File=./log/testlog1.log
log4j.appender.HTML.File=./log/application.html

// Here we define the layout and pattern
log4j.appender.CONSOLE.layout=org.apache.log4j.PatternLayout
log4j.appender.CONSOLE.layout.ConversionPattern= %5p [%t] (%F:%L)- %m%n
log4j.appender.R.layout=org.apache.log4j.PatternLayout
log4j.appender.R.layout.ConversionPattern=%d - %c -%p - %m%n
log4j.appender.TTCC.layout=org.apache.log4j.TTCCLayout
log4j.appender.TTCC.layout.DateFormat=ISO8601
log4j.appender.HTML.layout=org.apache.log4j.HTMLLayout
log4j.appender.HTML.layout.Title=Application log
log4j.appender.HTML.layout.LocationInfo=true