Kotlin Class: Logger class with companion object for logging

Last update on December 20 2024 12:55:10 (UTC/GMT +8 hours)

Write a Kotlin program that creates a class 'Logger' with a companion object that provides logging functionality.

Sample Solution:

Kotlin Code:

class Logger private constructor() {
    companion object {
        fun log(message: String) {
            println("Logging: $message")
        }
    }
}

fun main() {
    Logger.log("This is a log message.")
}

Sample Output:

Logging: This is a log message

Explanation:

In the above exercise -

• First we define a "Logger" class with a private constructor to prevent direct instantiation of the class. Inside the "Logger" class, we have a companion object that provides logging functionality.
• The companion object contains a log function that takes a message parameter and prints a log message. In this example, it simply prints the message with "Logging: ".
• In the "main()" function, we call the log function of the Logger class through the companion object by using the syntax Logger.log("message"). This logs the provided message.

Kotlin Editor:

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