log4j.rootLogger=INFO, console log4j.appender.console=org.apache.log4j.ConsoleAppender log4j.appender.console.layout=org.apache.log4j.PatternLayout log4j.appender.console.layout.ConversionPattern=%d [%-5p] %c - %m%n log4j.logger.com.example=DEBUG, file log4j.appender.file=org.apache.log4j.RollingFileAppender log4j.appender.file.File=/path/to/logfile.log log4j.appender.file.MaxFileSize=10MB log4j.appender.file.MaxBackupIndex=5 log4j.appender.file.layout=org.apache.log4j.PatternLayout log4j.appender.file.layout.ConversionPattern=%d [%-5p] %c - %m%n import org.apache.log4j.Logger; public class MyClass { private static final Logger logger = Logger.getLogger(MyClass.class); public void myMethod() { logger.debug("Debug message"); logger.info("Info message"); logger.warn("Warning message"); logger.error("Error message"); } }