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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 |