properties log4j.rootLogger=DEBUG, CONSOLE log4j.appender.CONSOLE=org.apache.log4j.ConsoleAppender log4j.appender.CONSOLE.Target=System.out log4j.appender.CONSOLE.layout=org.apache.log4j.PatternLayout log4j.appender.CONSOLE.layout.ConversionPattern=%-5p %d{yyyy-MM-dd HH:mm:ss} %c{1}:%L - %m%n import org.apache.log4j.Logger; public class MyClass { private static final Logger logger = Logger.getLogger(MyClass.class); public void doSomething() { logger.debug("Debug message"); logger.info("Info message"); logger.warn("Warning message"); logger.error("Error message"); } }