I am running my app with Maven. But I get an error:

SLF4J: Failed to load class "org.slf4j.impl.StaticLoggerBinder".
SLF4J: Defaulting to no-operation (NOP) logger implementation
SLF4J: See http://www.slf4j.org/codes.html#StaticLoggerBinder for further details.

App uses log4j:

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

public class App {
    public static void main(String[] args) {
        Logger logger = LoggerFactory.getLogger(App.class);
        logger.info("Test 1,2,3");
        System.out.println("End of my program");

    }
}

pom.xml file includes next dependencies:

        <dependency>
            <groupId>org.slf4j</groupId>
            <artifactId>slf4j-api</artifactId>
            <version>1.7.30</version>
        </dependency>

        <dependency>
            <groupId>org.slf4j</groupId>
            <artifactId>slf4j-simple</artifactId>
            <version>1.7.30</version>
            <scope>test</scope>
        </dependency>

How to solve this problem? I checked solutions in google but it doesnt help...

I tried to add implepentation for example slf4j-simple but nothing changed

errr

CodePudding user response：

The solution did not need to test scope in Slf4j Dependencies because it is probably not available when you run your main method.

       <dependency>
           <groupId>org.slf4j</groupId>
           <artifactId>slf4j-api</artifactId>
           <version>1.7.30</version>
       </dependency>

       <dependency>
           <groupId>org.slf4j</groupId>
           <artifactId>slf4j-simple</artifactId>
           <version>1.7.30</version>
           <scope>test</scope>  //Remove the test scope
       </dependency>

Then it's working fine without any errors.

Thanks.