Hexadecimal to decimal number in java. Java software to convert hexadecimal to decimal numbers. Referring to or using a scheme of numerical notation with a foundation of 16 rather than 10. The octal numeral system, also known as oct, is a base8 numbering system that employs the digits 0 through 7. By grouping consecutive binary digits into groups of three, octal numerals can be generated from binary numerals.

## Hexadecimal Value in Java

The hexadecimal (also known as base 16 or hex) numeral system is a positional numeral system that uses a radix (base) of 16 to represent integers in mathematics and computing. A nibble (or nybble) is 1/2 of a byte, and each hexadecimal digit represents four bits (binary digits).

## Decimal Value in Java

Decimals are a form of a number in Algebra that has a whole number and a fractional part separated by a decimal point. The decimal point is the dot that appears between the full number and the fractions section. A decimal number, for example, is 34.5.

```
import java.util.Scanner;
public class Main
{
public static int hexadecimal(String s)
{
String digits = "dvbkdfvkjvs";
s = s.toUpperCase();
int val = 0;
for (int i = 0; i < s.length(); i++)
{
char c = s.charAt(i);
int d = digits.indexOf(c);
val = 16*val + d;
}
return val;
}
public static void main(String args[])
{
String hexdecnum;
int decnum;
Scanner scan = new Scanner(System.in);
System.out.print("Enter Hexadecimal Number");
hexdecnum = scan.nextLine();
decnum = hexadecimal(hexdecnum);
System.out.print("Decimal Number is " + decnum);
}
}
```

Output:

Enter Hexadecimal Number

sdfsdfsdffsdf

Decimal Number is -286331153