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In: Computer Science

You are supposed to write Java program for the following questions. For every question, do provide...

You are supposed to write Java program for the following questions. For every question, do provide at least THREE (3) different test cases. Question 1 Modify question 3 of Assignment 1 to accept a telephone number with any number of letters. The output should display a hyphen after the first 3 digits and subsequently a hyphen (-) after every four digits. Also, modify the program to process as many telephone numbers as the user wants.

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Expert Solution

Copyable Code:

import java.util.Scanner;
public class assignProgram
{
public static void main(String args[])
{
       String number;
       char c;
       Scanner in = new Scanner(System.in);
       for(;;)
       {
           System.out.print("\nEnter the phone number that is in letters or for quit enter 0: ");
           number = in.nextLine();
       if(number.equals("0"))
           {
               break;
           }
           for(int i = 0; i < 8; i++)
           {
               c = number.charAt(i);
               if(i == 3)
                   System.out.print("-");
               if(c >= 'A' && c <= 'Z' || c >= 'a' && c <='z')
               {
                       switch(c)
                       {              

                           case 'A':
                           case 'a':
                           case 'B':
                           case 'b':
                           case 'C':
                           case 'c':
                           System.out.print("2");
                           break;
                           case 'D':
                           case 'd':
                           case 'E':
                           case 'e':
                           case 'F':
                           case 'f':
                           System.out.print("3");
                           break;
                           case 'G':
                           case 'g':
                           case 'H':
                           case 'h':
                           case 'I':
                           case 'i':
                               System.out.print("4");
                               break;
                           case 'J':
                           case 'j':
                           case 'K':
                           case 'k':
                           case 'L':
                           case 'l':
                               System.out.print("5");
                               break;
                           case 'M':
                           case 'm':
                           case 'N':
                           case 'n':
                           case 'O':
                           case 'o':
                               System.out.print("6");
                           break;
                       case 'P':
                           case 'p':
                           case 'Q':
                           case 'q':
                           case 'R':
                           case 'r':
                           case 'S':
                           case 's':
                               System.out.print("7");
                           break;
                       case 'T':
                           case 't':
                           case 'U':
                           case 'u':
                           case 'V':
                           case 'v':
                               System.out.print("8");
                           break;
                       case 'W':
                           case 'w':
                       case 'X':
                       case 'x':
                           case 'Y':
                           case 'y':
                           case 'Z':
                           case 'z':
                           System.out.print("9");
                           break;   
                   }
                   }
               }
           }
       }
}


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