public static void main(String[] args) {
        List<Integer> numbers = new ArrayList<Integer>();
        numbers.add(new Integer(5));
        numbers.add(new Integer(2));
        numbers.add(new Integer(15));
        numbers.add(new Integer(51));
        numbers.add(new Integer(53));
        numbers.add(new Integer(35));
        numbers.add(new Integer(45));
        numbers.add(new Integer(32));
        numbers.add(new Integer(43));
        numbers.add(new Integer(16));

        Ordering ordering = Ordering.natural();
        System.out.println("Input List: ");
        System.out.println(numbers);
        Collections.sort(numbers,ordering );
        System.out.println(numbers);

        System.out.println("======================");
        System.out.println("List is sorted: " + ordering.isOrdered(numbers));
        System.out.println("Minimum: " + ordering.min(numbers));
        System.out.println("Maximum: " + ordering.max(numbers));

        Collections.sort(numbers,ordering.reverse());
        System.out.println("Reverse: " + numbers);

        numbers.add(null);
        System.out.println("Null added to Sorted List: ");
        System.out.println(numbers);

        Collections.sort(numbers,ordering.nullsFirst());
        System.out.println("Null first Sorted List: ");
        System.out.println(numbers);

        System.out.println("======================");
        List<String> names = new ArrayList<String>();
        names.add("Ram");
        names.add("Shyam");
        names.add("Mohan");
        names.add("Sohan");
        names.add("Ramesh");
        names.add("Suresh");
        names.add("Naresh");
        names.add("Mahesh");
        names.add(null);
        names.add("Vikas");
        names.add("Deepak");
        System.out.println("Another List: ");

        System.out.println(names);

        Collections.sort(names,ordering.nullsFirst().reverse());
        System.out.println("Null first then reverse sorted list: ");
        System.out.println(names);

image.png

package guavaTest;

import com.google.common.collect.Ordering;

import java.util.ArrayList;
import java.util.Collections;
import java.util.List;

public class OrderTest {

    public static void main(String[] args) {
        List<Integer> numbers = new ArrayList<Integer>();
        numbers.add(new Integer(5));
        numbers.add(new Integer(2));
        numbers.add(new Integer(15));
        numbers.add(new Integer(51));
        numbers.add(new Integer(53));
        numbers.add(new Integer(35));
        numbers.add(new Integer(45));
        numbers.add(new Integer(32));
        numbers.add(new Integer(43));
        numbers.add(new Integer(16));
        numbers.add(new Integer(16));

        Ordering ordering = Ordering.natural();

        System.out.println(ordering.greatestOf(numbers,3));
        System.out.println(ordering.isOrdered(numbers));
        System.out.println(ordering.leastOf(numbers,3));
        System.out.println(ordering.sortedCopy(numbers));
    }
}

image.png