Java tutorial
public class Main { public static void main(String[] args) { int integer = 1024; String octal = Integer.toOctalString(integer); System.out.printf("Octal value of %d is '%s'.\n", integer, octal); System.out.printf("Octal value of %1$d is '%1$o'.\n", integer); int original = Integer.parseInt(octal, 8); System.out.printf("Integer value of octal '%s' is %d.", octal, original); } }