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HexToOct.java
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69 lines (62 loc) · 1.79 KB
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package Conversions;
import java.util.Scanner;
/**
* Converts any Hexadecimal Number to Octal
*
* @author Tanmay Joshi
*/
public class HexToOct {
/**
* This method converts a Hexadecimal number to a decimal number
*
* @param s The Hexadecimal Number
* @return The Decimal number
*/
public static int hex2decimal(String s) {
String str = "0123456789ABCDEF";
s = s.toUpperCase();
int val = 0;
for (int i = 0; i < s.length(); i++) {
char a = s.charAt(i);
int n = str.indexOf(a);
val = 16 * val + n;
}
return val;
}
/**
* This method converts a Decimal number to a octal number
*
* @param q The Decimal Number
* @return The Octal number
*/
public static int decimal2octal(int q) {
int now;
int i = 1;
int octnum = 0;
while (q > 0) {
now = q % 8;
octnum = (now * (int) (Math.pow(10, i))) + octnum;
q /= 8;
i++;
}
octnum /= 10;
return octnum;
}
/**
* Main method that gets the hex input from user and converts it into octal.
* @param args arguments
*/
public static void main(String args[]) {
String hexadecnum;
int decnum, octalnum;
Scanner scan = new Scanner(System.in);
System.out.print("Enter Hexadecimal Number : ");
hexadecnum = scan.nextLine();
// first convert hexadecimal to decimal
decnum = hex2decimal(hexadecnum); //Pass the string to the hex2decimal function and get the decimal form in variable decnum
// convert decimal to octal
octalnum = decimal2octal(decnum);
System.out.println("Number in octal: " + octalnum);
scan.close();
}
}