import java.util.logging.Level;
import java.util.logging.Logger;

// default log config file jre/lib/logging.properties
// to change 
// java -Djava.util.logging.config.file= configFile MainClass
public class Main {
 private static final Logger myLogger = Logger.getLogger("com.mycompany.myapp");

 public static void main(String... args) {
 logB();
 logA();
 logB();
 }

 public static void logA() {
 Logger.getGlobal().setLevel(Level.INFO); // this is a java bug
 Logger.getGlobal().info("currently not off");

 Logger.getGlobal().setLevel(Level.OFF);
 Logger.getGlobal().info("this log won't be print");
 }

 public static void logB() {
 myLogger.info("hello");
 }
}