How can I implement log rotation in my Java application?

How can I implement log rotation in my Java application?

You can implement log rotation in Java using libraries like Log4j or java.util.logging. Would you like a code example?

Yes, please provide a code example using Log4j.

Here's a simple example:

import org.apache.log4j.Logger;
import org.apache.log4j.PropertyConfigurator;
import org.apache.log4j.RollingFileAppender;
import org.apache.log4j.SimpleLayout;

public class LogRotationExample {
    private static final Logger logger = Logger.getLogger(LogRotationExample.class);

    public static void main(String[] args) {
        PropertyConfigurator.configure("log4j.properties");
        for (int i = 0; i < 1000; i++) {
            logger.info("This is log message number " + i);
        }
    }
}

Make sure to configure your log4j.properties file for rolling behavior.

What should I include in the log4j.properties file?

Your log4j.properties file should include settings like this:

log4j.rootLogger=INFO, file

log4j.appender.file=org.apache.log4j.RollingFileAppender
log4j.appender.file.File=app.log
log4j.appender.file.MaxFileSize=1MB
log4j.appender.file.MaxBackupIndex=10
log4j.appender.file.layout=org.apache.log4j.PatternLayout
log4j.appender.file.layout.ConversionPattern=%d{ISO8601} %-5p [%t] %c: %m%n

This configuration will rotate the log file when it reaches 1MB and keep 10 backup files.