Hello Program with Apache Log4j
Q
How to write a simple Hello program with Apache Log4j? I need it to test out which JARs are needed to compile and run my Java applications using Apache Log4j.
✍: FYIcenter.com
A
Below is a simple Hello program, HelloLog4j2.java, that calls the Log4j 2 API:
// Copyright (c) FYIcenter.com
import org.apache.logging.log4j.*;
public class HelloLog4j2 {
private static final Logger logger = LogManager.getLogger("fyiLogger");
public static void main(String[] args) {
System.out.println("Logger class: "+logger.getClass().getName());
logger.fatal("Hello - fatal");
logger.error("Hello - error");
logger.warn("Hello - warn");
logger.info("Hello - info");
logger.debug("Hello - debug");
logger.trace("Hello - trace");
}
}
This sample program, HelloLog4j2.java, does the following:
- It uses only the Log2j 2 API only.
- It creates logger object named as "fyiLogger".
- It prints out the class name of the logger object.
- It logs a simple message at each of 6 logging levels: fatal, error, warn, info, debug, and trace.
⇒ Compiling Program with Apache Log4j
⇐ Including Apache Log4j JAR Files in Classpath
2015-11-18, ∼1917🔥, 0💬
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