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/* package whatever; // don't place package name! */
 
import java.util.*;
import java.lang.*;
import java.io.*;
import lombok.extern.log4j.Log4j2;
 
/* Name of the class has to be "Main" only if the class is public. */
@Log4j2
class Ideone
{
	public static void main (String[] args) throws java.lang.Exception
	{
		logger.error("one two three: {} {} {}", "a", "b", 
              "c", new Exception("something went wrong"));
	}
}

Main.java:6: error: package lombok.extern.log4j does not exist
import lombok.extern.log4j.Log4j2;
                          ^
Main.java:9: error: cannot find symbol
@Log4j2
 ^
  symbol: class Log4j2
Main.java:14: error: cannot find symbol
		logger.error("one two three: {} {} {}", "a", "b", 
		^
  symbol:   variable logger
  location: class Ideone
3 errors

Standard output is empty