Log4j2.19.0 RollingFileAppender Programatically in java

Question

How to create RollingFileAppender programmatically in Java?

In log4j1 this works:

Logger rootLogg;
RollingFileAppender appendFile;
rootLogg = LogManager.getRootLogger();
appendFile = (RollingFileAppender)rootLogg.getAppender("appendFile");

but in log4j 2.19.0 it doesn't.

I want RollingFileAppender programatically for log4j2.19.0 in Java.

All properties of appender are defined in log4j2.properties file.

URL url = null;
LoggerContext context = (LoggerContext) LogManager.getContext(false);
if (propertiesFile !=null)
    url = EMSLogger.class.getClassLoader().getResource("log4j2.properties");
if (url != null) {
    try {
        URI uri =new URI(url.toString());
        context.setConfigLocation(uri);
    } catch (URISyntaxException e) {
        e.printStackTrace();
    }
}

I have been through many answers but could not find solution for my problem. I'm expecting working code.