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package org.apache.log4j; public class Logger { // Creation and retrieval methods: public static Logger getRootLogger(); public static Logger getLogger(String name); // printing methods: public void debug(Object message); public void info(Object message); public void warn(Object message); public void error(Object message); public void fatal(Object message); // generic printing method: public void log(Level l, Object message); } |
Logger x = Logger.getLogger("wombat"); Logger y = Logger.getLogger("wombat"); |
PropertyConfigurator.configure("log4j.properties"); |
private static Logger log = Logger.getLogger("MyCLASS.class"); |
log.debug("it is the debug info"); |
import org.apache.log4j.Logger; public class Test { static Logger log= Logger.getLogger(Test.class); public void log(){ log.debug("Debug info."); log.info("Info info"); log.warn("Warn info"); log.error("Error info"); log.fatal("Fatal info"); } public static void main(String[] args) { Test test = new Test(); test.log(); } } |
log4j.rootLogger=info, stdout log4j.appender.stdout=org.apache.log4j.ConsoleAppender log4j.appender.stdout.layout=org.apache.log4j.PatternLayout # Pattern to output the caller's file name and line number. log4j.appender.stdout.layout.ConversionPattern=%5p [%t] (%F:%L) - %m%n |
log4j.rootLogger=info, stdout |
log.debug("Debug info."); |
log4j.appender.A=org.apache.log4j.ConsoleAppender |
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