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HexToOct.java
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74 lines (66 loc) · 1.7 KB
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/**
+ * Converts any Hexadecimal Number to Octal
+ *
+ * @author Tanmay Joshi
+ *
+ */
import java.util.Scanner;
public class HexToOct
{
/**
+ * This method converts a Hexadecimal number to
+ * a decimal number
+ *
+ * @param 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 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.
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);
}
}