04. The Smallest of 3 Numbers

import java.text.DecimalFormat;
import java.util.ArrayList;
import java.util.Collections;
import java.util.Scanner;

public class _04_SmallestOfThreeNumbers {
    public static void main(String[] args) {
        ArrayList<Double> arrayOfDoubles = new ArrayList<Double>();
        Scanner scanner = new Scanner(System.in);

        for (int i = 0; i < 3; i++) {
            arrayOfDoubles.add(scanner.nextDouble());
        }

        double smallestNumber = Collections.min(arrayOfDoubles);

        // Use this line in order to format the double. Using it, the result will be always in correct format.
        // For example, the whole number -5, which is double, without this formatter it will be printed on the console as - 5.0.
        // If the number is -1.1, it will be printed in a correct format.
        DecimalFormat format = new DecimalFormat();

        System.out.println(format.format(smallestNumber));
    }
}