import org.apache.commons.logging.Log; import org.apache.commons.logging.LogFactory; public class MyClass { private static final Log logger = LogFactory.getLog(MyClass.class); public void doSomething() { // some code that may cause a warning logger.warn("Something went wrong"); } }In this example, the LogFactory class is used to get an instance of the Log interface. Then, inside the doSomething method, a warning message is logged using the warn method. The Log describe method is not part of the Log interface in the org.apache.commons.logging package. It is possible that it belongs to another package or library. Without more information, it's not possible to determine its usage or how to provide an example.