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+import org.apache.logging.log4j.Logger;%0Aimport org.apache.logging.log4j.LogManager;%0A%0Apublic class HelloLog4J2Simplest %7B%0A    private static final Logger logger = LogManager.getLogger();%0A    public static void main(String... args) %7B%0A        System.out.println(%22Hello Log4J2 Simplest!%22);%0A        logger.info(%22This is an information entry%22);%0A        logger.debug(%22This is a debugging entry%22);%0A        logger.warn(%22This is a warning entry%22);%0A        logger.error(%22This is an error entry%22);%0A    %7D%0A%7D%0A

Create HelloLog4J2Simplest.java