PerfectNumber.java

package liczbydoskonale;

import java.util.Arrays;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;

class Zero implements Runnable {
    public ExecutorService exec = Executors.newCachedThreadPool();
    Zero(int pos, int n, int array[]) {
        this.pos = pos;
        this.n = n;
        this.array = array;
    }

    public int pos = 2;
    public int n = 0;
    public int[] array;

    public void run() {
        int i = pos;
        int k = 1;
        while (i < n) {
            pos *= k;
            array[pos] = this.pos;
            i++;
        }
    }
}

class PerfectNumber {
    public PerfectNumber(int n) {
        this.n = n;
    }

    private int n = 0;
    private int array[];
    public void count() {
        array = new int[n];
        Arrays.fill(array, 0);
        for ( int i = 0; i < n; i++ ){
            if (array[i] == 0) {
                new Thread(new Zero(i, n, array)).start();
            }
        }
    }

}

public class Main {
    public static void main(String[] args) {
        new PerfectNumber(30);
    }

}