Need to create a driver class for a program i have made...

Question

hey guys im new to these forums and someone told me that i could get help on here if i get in a bind...my problem is that i need help creating a driver class for a program that i have created and i dont know what to do. i need to know how to do this is because my professor told us after i was 2/3 done my project that we need at least 2 class files for our project, so i need at least 2 class files for it to run... my program is as follows:
p.s might be kinda messy, might need to put it into a text editor
Cipher.java
This program encodes and decodes text strings using a cipher that
can be specified by the user.
import java.io.*;
public class Cipher
public static void printID()
// output program ID
System.out.println ("*********************");
System.out.println ("* Cipher *");
System.out.println ("* *");
System.out.println ("* *");
System.out.println ("* *");
System.out.println ("* CS 181-03 *");
System.out.println ("*********************");
public static void printMenu()
// output menu
System.out.println("\n\n****************************" +
"\n* 1. Set cipher code. *" +
"\n* 2. Encode text. *" +
"\n* 3. Decode coded text. *" +
"\n* 4. Exit the program *" +
"\n****************************");
public static String getText(BufferedReader input, String prompt)
throws IOException
// prompt the user and get their response
System.out.print(prompt);
return input.readLine();
public static int getInteger(BufferedReader input, String prompt)
throws IOException
// prompt and get response from user
String text = getText(input, prompt);
// convert it to an integer
return (new Integer(text).intValue());
public static String encode(String original, int offset)
// declare constants
final int ALPHABET_SIZE = 26; // used to wrap around A-Z
String encoded = ""; // base for string to return
char letter; // letter being processed
// convert message to upper case
original = original.toUpperCase();
// process each character of the message
for (int index = 0; index < original.length(); index++)
// get the letter and determine whether or not to
// add the cipher value
letter = original.charAt(index);
if (letter >='A' && letter <= 'Z')
// is A-Z, so add offset
// determine whether result will be out of A-Z range
if ((letter + offset) > 'Z') // need to wrap around to 'A'
letter = (char)(letter - ALPHABET_SIZE + offset);
else
if ((letter + offset) < 'A') // need to wrap around to 'Z'
letter = (char)(letter + ALPHABET_SIZE + offset);
else
letter = (char) (letter + offset);
// build encoded message string
encoded = encoded + letter;
return encoded;
public static String decode(String original, int offset)
// declare constants
final int ALPHABET_SIZE = 26; // used to wrap around A-Z
String decoded = ""; // base for string to return
char letter; // letter being processed
// make original message upper case
original = original.toUpperCase();
// process each letter of message
for (int index = 0; index < original.length(); index++)
// get letter and determine whether to subtract cipher value
letter = original.charAt(index);
if (letter >= 'A' && letter <= 'Z')
// is A-Z, so subtract cipher value
// determine whether result will be out of A-Z range
if ((letter - offset) < 'A') // wrap around to 'Z'
letter = (char)(letter + ALPHABET_SIZE - offset);
else
if ((letter - offset) > 'Z') // wrap around to 'A'
letter = (char)(letter - ALPHABET_SIZE - offset);
else
letter = (char) (letter - offset);
// build decoded message
decoded = decoded + letter;
return decoded;
// main controls flow throughout the program, presenting a
// menu of options the user.
public static void main (String[] args) throws IOException
// declare constants
final String PROMPT_CHOICE = "Enter your choice: ";
final String PROMPT_VALID = "\nYou must enter a number between 1" +
" and 4 to indicate your selection.\n";
final String PROMPT_CIPHER = "\nEnter the offset value for a caesar " +
"cipher: ";
final String PROMPT_ENCODE = "\nEnter the text to encode: ";
final String PROMPT_DECODE = "\nEnter the text to decode: ";
final String SET_STR = "1"; // selection of 1 at main menu
final String ENCODE_STR = "2"; // selection of 2 at main menu
final String DECODE_STR = "3"; // selection of 3 at main menu
final String EXIT_STR = "4"; // selection of 4 at main menu
final int SET = 1; // menu choice 1
final int ENCODE = 2; // menu choice 2
final int DECODE =3; // menu choice 4
final int EXIT = 4; // menu choice 3
final int ALPHABET_SIZE = 26; // number of elements in alphabet
// declare variables
boolean finished = false; // whether or not to exit program
String text; // input string read from keyboard
int choice; // menu choice selected
int offset = 0; // caesar cipher offset
// declare and instantiate input objects
InputStreamReader reader = new InputStreamReader(System.in);
BufferedReader input = new BufferedReader(reader);
// Display program identification
printID();
// until the user selects the exit option, display the menu
// and respond to the choice
do
// Display menu of options
printMenu();
// Prompt user for an option and read input
text = getText(input, PROMPT_CHOICE);
// While selection is not valid, prompt for correct info
while (!text.equals(SET_STR) && !text.equals(ENCODE_STR) &&
!text.equals(EXIT_STR) && !text.equals(DECODE_STR))
text = getText(input, PROMPT_VALID + PROMPT_CHOICE);
// convert choice to an integer
choice = new Integer(text).intValue();
// respond to the choice selected
switch(choice)
case SET:
     // get the cipher value from the user and constrain to
// -25..0..25
offset = getInteger(input, PROMPT_CIPHER);
offset %= ALPHABET_SIZE;
break;
case ENCODE:
// get message to encode from user, and encode it using
// the current cipher value
text = getText(input, PROMPT_ENCODE);
text = encode(text, offset);
System.out.println("Encoded text is: " + text);
break;
case DECODE:
// get message to decode from user, and decode it using
// the current cipher value
text = getText(input, PROMPT_DECODE);
text = decode(text, offset);
System.out.println("Decoded text is: " + text);
break;
case EXIT:
// set exit flag to true
finished = true ;
break;
} // end of switch on choice
} while (!finished); // end of outer do loop
// Thank user
System.out.println("Thank you for using Cipher for all your" +
" code breaking and code making needs.");
}

Answer 1

My source in code format...sorry guys :)
   Cipher.java
   This program encodes and decodes text strings using a cipher that
   can be specified by the user.
import java.io.*;
public class Cipher
   public static void printID()
      // output program ID
      System.out.println ("*********************");
      System.out.println ("*       Cipher      *");
      System.out.println ("*                   *");
      System.out.println ("*                          *");
      System.out.println ("*                   *");
      System.out.println ("*     CS 181-03     *");
      System.out.println ("*********************");
   public static void printMenu()
      // output menu
      System.out.println("\n\n****************************" +
                           "\n*   1. Set cipher code.    *" +
                           "\n*   2. Encode text.        *" +
                           "\n*   3. Decode coded text.  *" +
                           "\n*   4. Exit the program    *" +
                           "\n****************************");
   public static String getText(BufferedReader input, String prompt)
                                       throws IOException
      // prompt the user and get their response
      System.out.print(prompt);
      return input.readLine();
   public static int getInteger(BufferedReader input, String prompt)
                                       throws IOException
      // prompt and get response from user
      String text = getText(input, prompt);
      // convert it to an integer
      return (new Integer(text).intValue());
   public static String encode(String original, int offset)
      // declare constants
      final int ALPHABET_SIZE = 26;  // used to wrap around A-Z
      String encoded = "";           // base for string to return
      char letter;                   // letter being processed
      // convert message to upper case
      original = original.toUpperCase();
      // process each character of the message
      for (int index = 0; index < original.length(); index++)
         // get the letter and determine whether or not to
         // add the cipher value
         letter = original.charAt(index);
         if (letter >='A' && letter <= 'Z')          
            // is A-Z, so add offset
            // determine whether result will be out of A-Z range
            if ((letter + offset) > 'Z') // need to wrap around to 'A'
               letter = (char)(letter - ALPHABET_SIZE + offset);
            else
               if ((letter + offset) < 'A') // need to wrap around to 'Z'
                  letter = (char)(letter + ALPHABET_SIZE + offset);
               else
                  letter = (char) (letter + offset);
         // build encoded message string
         encoded = encoded + letter;
      return encoded;
   public static String decode(String original, int offset)
      // declare constants
      final int ALPHABET_SIZE = 26;  // used to wrap around A-Z
      String decoded = "";           // base for string to return
      char letter;                   // letter being processed
      // make original message upper case
      original = original.toUpperCase();
      // process each letter of message
      for (int index = 0; index < original.length(); index++)
         // get letter and determine whether to subtract cipher value
         letter = original.charAt(index);
         if (letter >= 'A' && letter <= 'Z')          
            // is A-Z, so subtract cipher value
            // determine whether result will be out of A-Z range
            if ((letter - offset) < 'A')  // wrap around to 'Z'
               letter = (char)(letter + ALPHABET_SIZE - offset);
            else
               if ((letter - offset) > 'Z') // wrap around to 'A'
                  letter = (char)(letter - ALPHABET_SIZE - offset);
               else
                  letter = (char) (letter - offset);
         // build decoded message
         decoded = decoded + letter;
      return decoded;
   // main controls flow throughout the program, presenting a
   // menu of options the user.
   public static void main (String[] args) throws IOException
     // declare constants
      final String PROMPT_CHOICE = "Enter your choice:  ";
      final String PROMPT_VALID = "\nYou must enter a number between 1" +
                                  " and 4 to indicate your selection.\n";
      final String PROMPT_CIPHER = "\nEnter the offset value for a caesar " +
                                   "cipher: ";
      final String PROMPT_ENCODE = "\nEnter the text to encode: ";
      final String PROMPT_DECODE = "\nEnter the text to decode: ";
      final String SET_STR = "1";  // selection of 1 at main menu
      final String ENCODE_STR = "2"; // selection of 2 at main menu
      final String DECODE_STR = "3"; // selection of 3 at main menu
      final String EXIT_STR = "4";  // selection of 4 at main menu
      final int SET = 1;            // menu choice 1
      final int ENCODE = 2;         // menu choice 2
      final int DECODE =3;          // menu choice 4
      final int EXIT = 4;           // menu choice 3
      final int ALPHABET_SIZE = 26; // number of elements in alphabet
      // declare variables
      boolean finished = false; // whether or not to exit program
      String text;              // input string read from keyboard
      int choice;               // menu choice selected
      int offset = 0;           // caesar cipher offset
      // declare and instantiate input objects
      InputStreamReader reader = new InputStreamReader(System.in);
      BufferedReader input = new BufferedReader(reader);
      // Display program identification
      printID();
      // until the user selects the exit option, display the menu
      // and respond to the choice
      do
         // Display menu of options
         printMenu(); 
         // Prompt user for an option and read input
         text = getText(input, PROMPT_CHOICE);
         // While selection is not valid, prompt for correct info
         while (!text.equals(SET_STR) && !text.equals(ENCODE_STR) &&
                 !text.equals(EXIT_STR) && !text.equals(DECODE_STR))       
            text = getText(input, PROMPT_VALID + PROMPT_CHOICE);
         // convert choice to an integer
         choice = new Integer(text).intValue();
         // respond to the choice selected
         switch(choice)
            case SET:
            // get the cipher value from the user and constrain to
               // -25..0..25
               offset = getInteger(input, PROMPT_CIPHER);
               offset %= ALPHABET_SIZE;
               break;
            case ENCODE:
               // get message to encode from user, and encode it using
               // the current cipher value
               text = getText(input, PROMPT_ENCODE);
               text = encode(text, offset);
               System.out.println("Encoded text is: " + text);
               break;
            case DECODE:
               // get message to decode from user, and decode it using
               // the current cipher value
               text = getText(input, PROMPT_DECODE);
               text = decode(text, offset);
               System.out.println("Decoded text is: " + text);
               break;
            case EXIT:
               // set exit flag to true
               finished = true ;
               break;
         } // end of switch on choice
      } while (!finished); // end of outer do loop
      // Thank user
      System.out.println("Thank you for using Cipher for all your" +
                         " code breaking and code making needs.");
}