Kotlin - Finding largest & smallest element in an Array, List & Set

Example 1: Finding the largest element in an Array

import java.util.*

/*
Kotlin Program to find the largest number in an Array.
 */
object Demo {
    @JvmStatic
    fun main(args: Array<String>) {
        val numbers = intArrayOf(2, 6, 7, 9, 5, 155, 66, 99)
        val largestNumber = Arrays.stream(numbers).max().asInt
        println("Largest Number= $largestNumber")
    }
}

Output:

Largest Number= 155


Example 2: Finding the largest element in a List
import java.util.*

/*
Kotlin Program to find the largest number in a List.
 */
object Demo {
    @JvmStatic
    fun main(args: Array<String>) {
        val numbers = listOf(2, 6, 7, 9, 5, 155, 66, 99)
        val largestNumber = numbers.stream().max(Comparator.
                              comparing { i: Int? ->
                                Integer.valueOf(i!!) }).get()
        println("Largest Number= $largestNumber")
    }
}
Output:

Largest Number= 155


Example 3: Finding the largest element in a Set
import java.util.Set

/*
Kotlin Program to find the largest number in a Set.
 */
object Demo {
    @JvmStatic
    fun main(args: Array<String>) {
        val numbers = Set.of(2, 6, 7, 9, 5, 155, 66, 99)
        val largestNumber = numbers.stream().max(Comparator.comparing
                              { i: Int? -> Integer.valueOf(i!!) }).
                                 get()
        println("Largest Number= $largestNumber")
    }
}
Output:

Largest Number= 155


Example 4: Finding the smallest element in a Set
import java.util.Set

/*
Kotlin Program to find the smallest number in a Set
 */
object Demo {
    @JvmStatic
    fun main(args: Array<String>) {
        val numbers = setOf(2, 6, 7, 9, 5, 55, 4, 99)
        val smallestNumber = numbers.stream().
                                min(Comparator.comparing
                                  { i: Int? -> Integer.
                                      valueOf(i!!) }).get()
        println("Smallest Number= $smallestNumber")
    }
}
Output:

Largest Number= 2


Example 5: Finding the smallest element in a List
import java.util.*

/*
Kotlin Program to find the smallest number in a List
 */
object Demo {
    @JvmStatic
    fun main(args: Array<String>) {
        val numbers = listOf(2, 6, 7, 9, 5, 55, 4, 11)
        val smallestNumber = numbers.stream().
                               min(Comparator.comparing
                                  { 
                                     i: Int? -> Integer.valueOf(i!!)
                                       }).get()
        println("Smallest Number= $smallestNumber")
    }
}
Output:

Largest Number= 2


Example 6: Finding the smallest element in an Array
import java.util.*

/*
Kotlin Program to find the smallest number in an array
 */
object Demo {
    @JvmStatic
    fun main(args: Array<String>) {
        val numbers = intArrayOf(12, 6, 7, 9, 5, 55, 4, 99)
        val smallestNumber = Arrays.stream(numbers).min().asInt
        println("Smallest Number= $smallestNumber")
    }
}
Output:

Largest Number= 4