import org.slf4j.LoggerFactory;

import ch.qos.logback.classic.LoggerContext;
import ch.qos.logback.classic.jmx.Configurator;
import ch.qos.logback.classic.jmx.ConfiguratorMBean;

public class Test {
public static void main(String[] args)

{ LoggerFactory.getLogger("com.test1"); LoggerFactory.getLogger("com.test2"); LoggerContext lc = (LoggerContext) LoggerFactory.getILoggerFactory(); ConfiguratorMBean configurator = new Configurator(lc); configurator.setLoggerLevel("com", "info"); configurator.setLoggerLevel("com", "null"); }

}

Exception in thread "main" java.lang.NullPointerException
at ch.qos.logback.classic.Logger.setLevel(Logger.java:193)
at ch.qos.logback.classic.jmx.Configurator.setLoggerLevel(Configurator.java:92)
at Test.main(Test.java:14)