Logger creation in classes in Spring Boot - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to create a logger instance in a Spring Boot class.

Spring Boot

private static final Logger logger = LoggerFactory.[1](MyClass.class);

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AgetLogger

BcreateLogger

CnewLogger

DbuildLogger

Attempts:

3 left

💡 Hint

Common Mistakes

Using methods like createLogger or newLogger which do not exist.

Trying to instantiate Logger directly.

The LoggerFactory's getLogger method is used to create a logger instance for the class.

2fill in blank

medium

Complete the code to import the Logger class from the correct package.

Spring Boot

import org.slf4j.[1];

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ALoggerFactory

BLogger

CLogManager

DLog

Attempts:

3 left

💡 Hint

Common Mistakes

Importing LoggerFactory instead of Logger.

Using LogManager which is from Log4j, not SLF4J.

The Logger interface is imported from org.slf4j.Logger.

3fill in blank

hard

Fix the error in the logger declaration by completing the code.

Spring Boot

private static final Logger logger = LoggerFactory.getLogger([1]);

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Athis

B"MyClass"

CMyClass

DMyClass.class

Attempts:

3 left

💡 Hint

Common Mistakes

Passing a string instead of a class literal.

Passing an instance or 'this' keyword.

The getLogger method requires a Class object, so MyClass.class is correct.

4fill in blank

hard

Fill both blanks to correctly declare and import the logger in a Spring Boot class.

Spring Boot

import org.slf4j.[1];

private static final Logger [2] = LoggerFactory.getLogger(MyService.class);

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ALogger

Blogger

CLoggerFactory

Dlog

Attempts:

3 left

💡 Hint

Common Mistakes

Importing LoggerFactory instead of Logger.

Naming the logger variable incorrectly.

The Logger interface is imported, and the logger instance is commonly named logger.

5fill in blank

hard

Fill all three blanks to complete the logger declaration with import and usage in a method.

Spring Boot

import org.slf4j.[1];

private static final Logger [2] = LoggerFactory.getLogger(AppController.class);

public void start() {
    [3].info("Application started");
}

Drag options to blanks, or click blank then click option'

ALogger

Blogger

DLoggerFactory

Attempts:

3 left

💡 Hint

Common Mistakes

Using LoggerFactory as a variable name.

Not importing Logger interface.

Calling info on LoggerFactory instead of logger.

Import the Logger interface, name the logger variable logger, and use it to log info messages.