Conjunto Potencia (a)

package FuncionesRelaciones;

/*
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/**
 *
 * @author phd
 */
public class test {

    public static void cPotencia(int num) {
        for (int i = 0; i < Math.pow(2, num); i++) {
            int[] array = new int[num];
            int temp = i;
            for (int j = 0; j < array.length; j++) {
                array[j] = temp % 2;
                temp /= 2;
            }
            String res = "{";
            for (int k = 0; k < array.length; k++) {
                if (array[k] == 1) {
                    res += (k + 1) + ",";
                }
            }
            res += "}, ";
            System.out.print(res);
        }
        System.out.println();
    }

    public static void main(String[] args) {

        cPotencia(5);

    }
}