**Write a Java Program to Convert Octal Number to Decimal and vice-versa**

public class DecimalOctal { public static void main(String[] args) { int decimal = 78; int octal = convertDecimalToOctal(decimal); System.out.printf("%d in decimal = %d in octal", decimal, octal); } public static int convertDecimalToOctal(int decimal) { int octalNumber = 0, i = 1; while (decimal != 0) { octalNumber += (decimal % 8) * i; decimal /= 8; i *= 10; } return octalNumber; } }