Java - (Debugging) Logger, Logging system

Log - Logging (Tracing) in Java.

A configuration provide specifications for:

• Logger objects - A Logger is the entry point to logs messages.
• Appenders (or Handlers) define where to write the message (console stdout, stderr, file, port, socket)
• Log message format (enriching the message with additional metadata)

Configuration:

• code
• file (xml, properties)

• JavaTM Logging APIs (or JUL), introduced with java 1.4.2
• Java - Slf4j - a logger facade
• Java - Log4j
• Jakarta Common Logging Component

• System.out.println and the Java Logging APIs