Tinkering With Java Stream()

package test;

import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import java.util.Random;
import java.util.stream.Collectors;

/**
 *
 * @author matthew.rupert
 */
public class Test
{
    private static DoStuff stuff;
    private static List a;
    
    private static class MyCoolClass implements Comparable{
        int value;

        MyCoolClass(int value) {
            this.value=value;
        }

        public int getValue() {
            return value;
        }

        public void add(int x) {
           value+=x;
        }

        @Override
        public String toString() {
            return Integer.toString(value);
        }

        @Override
        public int compareTo(MyCoolClass other) {
          if (this.getValue() > other.getValue())
              return 1;
          return -1;
        }
    }

    private static class DoStuff {
        
        public static void doStuff() {
            a = new ArrayList<>();
            //List a a = new ArrrayList<>();
            Random rand = new Random();
            for (int i=0; i<=10; i++) {                 a.add(new MyCoolClass(rand.nextInt(100)));             }             //Collections.sort(a);             Collections.sort(a);             System.out.println("sorted: " + a.toString());             Collections.shuffle(a);             System.out.println("\nshuffled: " + a.toString());             // Filter only > 50
            System.out.println("\nfiltered (>50): ");
            a.stream().filter(b -> b.getValue() >= 50).forEach(b -> System.out.println(b));

            // Filter only > 50 and even
            System.out.println("\nfiltered (>50 and even): ");
            a.stream().filter(b -> b.getValue() >= 50).filter(b -> b.getValue() % 2 == 0).forEach(b -> System.out.println(b));

            // Filter only < 50, place results in ArrayList
            System.out.println("\nfiltered (<50) with results as ArrayList: ");
            List c;
            c = a.stream().filter(b -> b.getValue() < 50).collect(Collectors.toList());
            System.out.println(c);
        }
    }

    public static void main(String[] args) {
      DoStuff.doStuff();
    }

}