How do I sort elements of an array?

import java.util.Arrays;

public class ArraySortExample {
    public static void main(String[] args) {
        // An array of random numbers
        int numbers[] = {3, 1, 8, 34, 1, 2, 13, 89, 5, 21, 55};

        System.out.print("Before: ");
        for (int i = 0; i < numbers.length; i++) {
            int number = numbers[i];
            System.out.print(number + "; ");
        }
        System.out.println("");

        // We need to sort these array elements into a correct
        // order from the smallest to the greatest.
        // We will use the Arrays class on java.utils package to do
        // the sort. The sort method of this class are overloaded,
        // so they can take other type of array as well such as byte[]
        // long[], float[], Object[].
        Arrays.sort(numbers);

        System.out.print("After: ");
        for (int i = 0; i < numbers.length; i++) {
            int number = numbers[i];
            System.out.print(number + "; ");
        }
        System.out.println("");

        // We can also do the sort only for the specified range of
        // array elements.
        float money[] = {1.05f, 99.8f, 3f, 4.55f, 7.23f, 6.50f};
        Arrays.sort(money, 3, money.length);

        // Here we display the sort result, the first and the second
        // element of the array is not included in the sort process.
        for (int i = 0; i < money.length; i++) {
            float v = money[i];
            System.out.print(v + "; ");
        }
    }
}