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

Welcome to the World of Online Learning:

Hello Friends “This blog helps you to learn Java programming concepts. You can learn Java  language at your own speed and time. One can learn concepts of Java language by practicing various programs given on various pages of this blog. Enjoy the power of Self-learning using the Internet.”

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

PROGRAM: Java Program to Convert Binary Number to Octal and vice-versa

/*Java Program to Convert Binary Number to Octal and vice-versa*/

1: Program to Convert Binary to Octal

class Main {
public static void main(String[] args) {
long binary = 101001;
int octal = convertBinarytoOctal(binary);
System.out.println(binary + ” in binary = ” + octal + ” in octal”);
}

public static int convertBinarytoOctal(long binaryNumber) {
int octalNumber = 0, decimalNumber = 0, i = 0;

while (binaryNumber != 0) {
decimalNumber += (binaryNumber % 10) * Math.pow(2, i);
++i;
binaryNumber /= 10;
}

i = 1;

while (decimalNumber != 0) {
octalNumber += (decimalNumber % 8) * i;
decimalNumber /= 8;
i *= 10;
}

return octalNumber;
}
}

2: Program to Convert Octal to Binary

class Main {
public static void main(String[] args) {
int octal = 67;
long binary = convertOctalToBinary(octal);
System.out.println(octal + ” in octal = ” + binary + ” in binary”);
}

public static long convertOctalToBinary(int octalNumber) {
int decimalNumber = 0, i = 0;
long binaryNumber = 0;

while (octalNumber != 0) {
decimalNumber += (octalNumber % 10) * Math.pow(8, i);
++i;
octalNumber /= 10;
}

i = 1;

while (decimalNumber != 0) {
binaryNumber += (decimalNumber % 2) * i;
decimalNumber /= 2;
i *= 10;
}

return binaryNumber;
}
}