What Is Log4j, Why Log4j Came Into Picture

For logging log4j is the best even today, let us see little history behind this 🙂 While developing Java/J2EE applications, for debugging an application that is to know the status of a java application at its execution time, in…

What Are The Main Components Of Log4J

We have mainly 3 components to work with Log4j … Logger Appender Layout Logger Logger is a class, in org.apache.log4j.* We need to create Logger object one per java class This component enables Log4j in our java class Logger…

Log4j Hello World Program

Let us see one simple program in Log4j For working with log4j, we must set log4j.jar in our class path Files Required Client.java my.txt   Directory Structure Client.java…

How To Create Log4j.properties File

In previous program, i have used FileAppender.  But if i would like to change my appender to JDBCAppender, i have to open my java file and do the modifications and need to recompile.  We can avoid this by  writing…

Example On Log4j.properties File With FileAppender & SimpleLayout

Let us see how to use log4j.properties file Files Required Client.java log4j.properties my.txt Directory Structure Client.java import org.apache.log4j.Logger; public class Client {   static Logger l =…

Log4j Example On Using FileAppender And ConsoleAppender Simultaneously

Let us see how to use FileAppender and ConsoleAppender at a time. Files Required Client.java log4j.properties my.txt Directory Structure Client.java import org.apache.log4j.Logger; public class Client {  …