Java - Programa para generar números enteros

import java.util.Scanner;

public class TareaFiorella {

	public static void main(String[] args) {

		// TODO Auto-generated method stub

		Scanner lector = new Scanner(System.in);

		System.out.print("Ingrese número:");

		int num = lector.nextInt();

		System.out.println("ingresado: "+num);

		boolean fin = false;

		int pivote=0;

		if(num%2 ==0){

			System.out.println("par");

			while(!fin){

				pivote = num/2;

				System.out.println(pivote);

				if(pivote==1) fin=true;

				num=pivote;

			}

		}

		else{

			System.out.println("impar");

			while(!fin){

				pivote = num/3 + 1;

				System.out.println(pivote);

				if(pivote==1) fin=true;

				num=pivote;

			}

		}

	}

}