Write a Java program to convert a string corresponding to a hexadecimal number of the form 0xHHHHHH to decimal as shown in the following examples:

Hexadecimal conversion program

Enter a hex number in the format 0xH...H, +ve only, blank line terminates.

Input is case insensitive except for leading 0x

> 0xFf

0xFf = 255

> 0

0 is not a valid entry.

> 0x0

0x0 = 0

> 0x10

0x10 = 16

> 0xf

0xf = 15

> 0xF

0xF = 15

> 0xfFfF

0xfFfF = 65535

>

Program terminated.

Notes

1. The input string must begin with the prefix 0x.

2. The hexadecimal digits are case insensitive, i.e., f and F are both interpreted as 15.

3. Your program MUST replicate the above example, EXACTLY.

4. Your program will consist of a single class, HexConversion, and must implement a method, hex2Int() with the following signature:

int hex2Int (String input);

5. This program is similar to Assignment 1. Of the String class methods, you are only allowed to use equals(), length(), charAt() and startsWith().