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How to check log4j version?

Log4j is an open-source logging framework for the Java programming language. It was created by Ceki Gülcü in 1996 and is now maintained by the Apache Software Foundation. Log4j is designed to be flexible and modular, allowing developers to configure logging based on their specific needs. It supports multiple output targets, including console, file, and database, and will enable developers to control the verbosity of logging based on the message's severity. Log4j also supports a wide range of message formats and can be configured to generate detailed logging information to help diagnose issues with an application.

There are several ways to check the version of Log4j you are using in your Java application:

  • Check the log4j library version in your project's dependencies: If you are using a build tool such as Maven or Gradle, you can check the version of the log4j library in your project's dependencies. The version should be specified in the build file (pom.xml for Maven and build.gradle for Gradle) for the project.
  • Check the log4j jar file: You can also check the version of log4j by looking at the log4j jar file that is included in your application's classpath. The version information should be included in the file name, such as log4j-1.2.17.jar, indicating that you are using Log4j version 1.2.17.
  • Use log4j's Configuration: You can use Log4j's Configuration to determine the version of Log4j. You can call the getVersion() method on the Logger class.

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