Recently, I’ve been practicing using log4j, but I keep getting errors when importing from Eclipse

 
But I have already imported it in the lib below
 

I guess the JAR package was not imported
If you want to place the JAR under the JDK, right-click and select Build Path –>; Configure Build Path
 

 
Then select Add Externsl Jars

 
Select the package we want to import

Then click Apply and it’s OK.