java.util.logger undefined for the type System.Logger

Question

I am new to java and trying to use the logger in java.util. I declare the logger like this snippet:

Logger logger = Logger.getLogger(MyClass.class.getName());

referring to this website: https://www.loggly.com/ultimate-guide/java-logging-basics/

What I did was:

private static final Logger logger = Logger.getLogger(EthicalEngine.class.getName());

However, it shows the error message

The method getLogger(String) is undefined for the type System.Logger

Here is part of my main class ( EthicalEngine ):

public class EthicalEngine {

private static final Logger logger = Logger.getLogger(EthicalEngine.class.getName());

public static void main(String[] args) throws Exception {
    EthicalEngine ethicalEngine = new EthicalEngine();
    ethicalEngine.commandLineProcess();

}

Did I do anything wrong, or there is something that I missed? Any help is highly appreciated.

Answer 1

You are confusing java.util.logging.Logger, which is a logging framework added in Java 1.4, and java.lang.System.Logger, which is a logging facade added in Java 9.

• java.util.logging.Logger is created by the Logger.getLogger(String name) method.

• java.lang.System.Logger is created by the System.getLogger?(String name) method.

Since you are calling Logger.getLogger(), it means that you imported the wrong Logger type.

Solution: Fix your import statement.

Answer 2

Replace

import java.lang.System.Logger;

with

import java.util.logging.Logger;

to remove the error.