[SOLVED] Cop3502 lab 04: numeric conversion

Overview: This project is designed to give students practice with loops and the Java String class, characters, and arithmetic. Your program will take a hexadecimal or binary number string as an input and print out its  decimal value. Specification The program will provide a looping menu that invites the user to choose from a menu of number string decoding options. It must provide options to convert hexadecimal and binary into decimal notation for full credit. Proper implementation of a binary to hexadecimal decoding may be added for extra credit:
Decoding Menu
————-
1. Decode hexadecimal
2. Decode binary
3. Convert binary to hexadecimal
4. Quit
Please enter an option: 1
Based on the user’s selection, the program should prompt the user for the appropriate input:
Please enter the numeric string to convert: 0xbadf00d
… and should display the result of the string decoding / encoding:
Result: 195948557
It should then display the menu again. This should repeat until the program is terminated. This  project  may  not  make  use  of  existing  hexadecimal  and/or  binary  conversion  routines  built  into  the  Java  language and platform; instead, you must do the conversion using your knowledge of binary and hexadecimal numbering systems. However, you may use Java String class methods as well as Math methods. It may be helpful to think of the ASCII values of hexadecimal numbers when working on this project!Program Methods:
Your program must provide and use the following methods. Each method signature must be match and it must behave as described. Methods should not display anything on the screen!
public static long hexStringDecode(String    hex  ) Decodes an entire hexadecimal string and returns its value.
public static short hexCharDecode(char    digit) Decodes a single hexadecimal digit and returns its value.
public static short binaryStringDecode(String binary) Decodes a binary string and returns its value.
public static String binaryToHex (String    binary)*Decodes a binary string, re-encodees it as hexadecimal, and returns the hexadecimal string.NOTE:  It  is  common  to  display  hexadecimal  numbers  with  ‘0x’  as  the  prefix  (e.g.,  the  number  FFFFFFFF  is  represented as 0xFFFFFFFF. Your program must be able to convert a hexadecimal string into number regardless of whether it is prefixed with ‘0x.’Additionally, it must handle the binary prefix ‘0b’. It is also common for hex numbers to be typed in lowercase (e.g., 0xffffffff); your program must handle upper- and lower-case letters.Submissions
NOTE: Your output must match the example output *exactly*. If it does not, you will not receive full credit for your submission!
File: NumericConversion.java
Method:Submit on ZyLabs
Do not submit any other files!
Sample Output:
Decoding Menu
————-
1. Decode hexadecimal
2. Decode binary
3. Convert binary to hexadecimal
4. Quit
Please enter an option: 1
Please enter the numeric string to convert: 0x4321
Result: 17185Decoding Menu
————-
1. Decode hexadecimal
2. Decode binary
3. Convert binary to hexadecimal
4. Quit
Please enter an option: 1
Please enter the numeric string to convert: fFfFfFfF
Result: 4294967295