Singleton class in Kotlin

Question

I want to know way to create singleton class, so that my Util class instantiate only once per app. However when I converted my Java class to kotlin, below code was generated

Answer 1

Only the word object is needed.

object UtilProject {
    var bar: Int = 0
    fun foo() {        
    }
}

And you directly access the object that has only one instance

fun main(args: Array) {
    UtilProject.bar = 1
    println(UtilProject.bar)    
}