Java custom logger: logging standards or/and best practices

I am developing a framework and I want the jar to be light weight and independent as much as it can be. So I wrote a logging class: ``` import java.util.Date; import java.util.Properties; public class Logger { private static final Logger me = new Logger(); private static boolean info = false; private static boolean debug = false; private static boolean error = false; private static String className = null; public static Logger getInstance(Class<?> clazz) { className = clazz.getCanonicalName(); try { Properties props = new CustProps().load(clazz); if(props.get(CustProps.NAME_LOG_MODE) != null) { String devMode = props.getProperty(CustProps.NAME_LOG_MODE) .toLowerCase(); if("info".equals(devMode)) { info = true; debug = true; } else if("debug".equals(devMode)) { debug = true; } } } catch (Exception e) { // debug is error by default } error = true; return me; } public void logError(Object msg) { if(isError()) { System.out.println(new Date().toString() + " ERROR ["+Logger.className+"] - " + msg); } } public void logDebug(Object msg) { if(isDebug()) { System.out.println(new Date().toString() + " DEBUG ["+Logger.className+"] - " + msg); } } public void logInfo(Object msg) { if(isInfo()) { System.out.println(new Date().toString() + " INFO ["+Logger.className+"] - " + msg); } } public boolean isInfo() { return Logger.info; } public boolean isDebug() { return Logger.debug; } public boolean isError() { return Logger.error; } } ``` - What are the best practices to make this logging better? - Is making your own logger even worth it? - Will the use of this logger make my framework worse than choosing something existing (like `log4j`)?