java - Configuring LogBack/ConsoleAppender to write to STDERR -

i'd configure logback consoleappender use stderr, opposed stdout. in particular, pure code, opposed properties/xml files. here's attempt. key notes regarding code: when .reset() called (as per code below), nothing logs out @ all. when .reset() not called, logs sent stdout (thus indicating code below not work @ all).

what's key bit enable this?

import ch.qos.logback.classic.level; import ch.qos.logback.classic.logger; import ch.qos.logback.classic.loggercontext; import ch.qos.logback.classic.encoder.patternlayoutencoder; import ch.qos.logback.classic.spi.iloggingevent; import ch.qos.logback.core.consoleappender; import org.slf4j.loggerfactory;  // stuff    private static logger buildlogger() {           loggercontext lc = (loggercontext) loggerfactory.getiloggerfactory();         logger logger = (ch.qos.logback.classic.logger) loggerfactory.getlogger(henson.class);         lc.reset();          patternlayoutencoder ple = new patternlayoutencoder();          ple.setpattern("%date %level [%thread] %logger{10} [%file:%line] %msg%n");         ple.setcontext(lc);         ple.start();          consoleappender<iloggingevent> ca = new consoleappender<>();         ca.settarget("system.err");         ca.setcontext(lc);         ca.start();         logger.detachandstopallappenders();         logger.addappender(ca);         logger.setlevel(level.debug);          return logger;     } 

the trick add encoder console , ensure loggers come context.

private static logger buildlogger() {          loggercontext lc = (loggercontext) loggerfactory.getiloggerfactory();         lc.reset();         logger logger = lc.getlogger(henson.class);         logger.detachandstopallappenders();          patternlayoutencoder ple = new patternlayoutencoder();         ple.setpattern("%date %level [%thread] %logger{10} [%file:%line] %msg%n");         ple.setcontext(lc);         ple.start();          consoleappender<iloggingevent> ca = new consoleappender<>();         ca.settarget("system.err");         ca.setcontext(lc);         ca.setencoder(ple);         ca.start();          logger.addappender(ca);          logger.setlevel(level.debug);         return logger;     }