logging the stacktrace

logging the stacktrace with log4j:

import org.apache.log4j.Logger;

import org.apache.log4j.PropertyConfigurator;

// ......

static Logger logger = Logger.getLogger(MyClass.class);

// ......

public static void debugException(Exception ex) {

    //ex.printStackTrace();

    logger.error("An error occurred in MyClass.", ex);

}