setLevel of java.util.logging.Level
import java.util.logging.Handler; import java.util.logging.Level; import java.util.logging.LogManager; import java.util.logging.Logger; import java.util.logging.SimpleFormatter; import java.util.logging.StreamHandler; public class test{ public static void main(String[] args){ Logger l = Logger.getLogger("com.test"); l.setLevel(Level.FINE); Handler[] handlers1 = l.getLogger(""). getHandlers(); for (int index = 0; index < handlers1.length; index++) { handlers1[index].setLevel(Level.FINE); } l.severe("SEVERE "); l.warning("WARNING "); l.config("CONFIG"); l.info("INFO"); l.fine("FINE"); l.finer("FINER"); l.finest("FINEST"); } }