Java tutorial
import java.beans.PropertyChangeEvent; import java.beans.PropertyChangeListener; import java.util.logging.LogManager; public class Main { public static void main(String[] argv) throws Exception { // Register for the event LogManager.getLogManager().addPropertyChangeListener(new PropertyChangeListener() { // This method is called when configuration file is reread public void propertyChange(PropertyChangeEvent evt) { String propName = evt.getPropertyName(); Object oldValue = evt.getOldValue(); Object newValue = evt.getOldValue(); // All values are null } }); } }