RandomAndStacks

import java.util.Arrays;
import java.util.Random;
import java.util.Stack;
import java.util.stream.IntStream;

public class RandomAndStacks {

    public static void main(String[] args) {

        Stack <Integer> myStack = new Stack <>();
        Stack<Integer> tempStack = new Stack<>();

        int element;
        for (int i = 0; i < 555; i++) {
            element = generateRandomNums(25000, 41000);
            isDivisibleByThreeAndTwo(element, myStack);
        }

        // Using traditional for-loop to display contents of myStack
        /*
        for (int i = 0; i < myStack.size(); i++) {
            System.out.println(myStack.pop());
        }
         */

        // Using IntStream.range() to display contents of myStack
        /*IntStream.range(0, myStack.size()).forEach(i -> {
            System.out.println(myStack.pop());
        });*/

        System.out.println("Sorting the stack of numbers...");


        while (!myStack.isEmpty()) {

            int popped = myStack.pop();

            while (!tempStack.isEmpty() && tempStack.peek() > popped) {
                myStack.push(tempStack.pop());
            }

            tempStack.push(popped);
        }

        System.out.println(Arrays.toString(tempStack.toArray()));
        System.out.printf("How many random numbers are in the stack? %,d\n", tempStack.size());

    }

    public static int generateRandomNums(int min, int max) {
        if ((min > max) || (max - min +1) > Integer.MAX_VALUE) {
            throw new IllegalArgumentException();
        }
        return new Random().nextInt(max - min +1) + min;
    }

    public static void isDivisibleByThreeAndTwo(int randomNum, Stack<Integer> s) {
        if (randomNum % 3 == 0 && randomNum % 2 == 0) {
            s.push(randomNum);
        }
    }
}