The Simple Logging Facade for Java (SLF4J) serves as a simple facade or abstraction for various logging frameworks, such as java.util.logging, log4j 1.x, reload4j and logback.

The org.slf4j.Logger interface is the main user entry point of SLF4J API. It is expected that logging takes place through concrete implementations of this interface.

The Simple Logging Facade for Java (SLF4J) serves as a simple facade or abstraction for various logging frameworks (e.g. java.util.logging, logback, log4j) allowing the end user to plug in the desired …

The LoggerFactory is a utility class producing Loggers for various logging APIs, e.g. logback, reload4j, log4j and JDK 1.4 logging. Other implementations such as NOPLogger and SimpleLogger are also …

SLF4J requires a logging provider because it is a logging API and not an logging implementation. Placing one (and only one) of the many available providers such as slf4j-nop.jar slf4j-simple.jar, slf4j …

Simple implementation of Logger that sends all enabled log messages, for all defined loggers, to the console (System.err). The following system properties are supported to configure the behavior of this …

When using SLF4J, do I have to recompile my application to switch to a different logging system? No, you do not need to recompile your application. You can switch to a different logging system by …

Your feedback is requested on changes under consideration for SLF4J version 2.1.0.

This class is a minimal implementation of the original org.apache.log4j.Logger class (as found in log4j 1.2) delegating all calls to a Logger instance.

An rather minimal but sufficient implementation redirecting all calls to a log4j logger to a logback logger.