balsikandar-okcredit

Student.Builder()
    .name("Alex")
    .standard(10)
    .rollNumber(720)
    .build()

        VS

Student.build {
    name = "Alex"

balsikandar-okcredit

class Student(
    val name: String?,
    val standard: Int,
    val rollNumber: Int
) {

    private constructor(builder: Builder) : this(builder.name, builder.standard, builder.rollNumber)

    class Builder {
        var name: String? = null

balsikandar-okcredit

class Student(
    val name: String?,
    val standard: Int,
    val rollNumber: Int
) {

    private constructor(builder: Builder) : this(builder.name, builder.standard, builder.rollNumber)

    companion object {
        inline fun student(block: Student.Builder.() -> Unit) = Student.Builder().apply(block).build()