Here is announcement for SLF4J (Simple Logging Facade for Java)

The Simple Logging Facade for Java or (SLF4J) is intended to serve as a simple facade for various logging APIs allowing to the end-user to plug in the desired implementation at deployment time. SLF4J also allows for a gradual migration path away from Jakarta Commons Logging (JCL).

SLF4J API offers an advanced abstraction of various logging systems, including JDK 1.4 logging, log4j and logback. Features include parameterized logging and MDC support.

Logging systems can either choose to implement the the SLF4J interfaces directly, à la logback or SimpleLogger. Alternatively, it is possible (and rather easy) to write SLF4J adapters for a given API implementation, e.g. Log4jLoggerAdapter or JDK14LoggerAdapter..