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