Question

Capitalization JAVA

In this program, you will read a file line-by-line. For each line of data (a string), you will process the words (or tokens) of that line one at a time. Your program will capitalize each word and print them to the screen separated by a single space. You will then print a single linefeed (i.e., newline character) after processing each line – thus your program will maintain the same line breaks as the input file.

Your program should prompt the user for the name of the file to be processed and continue prompting until a valid (existing) file name is entered. Once a valid file name is entered, you should open it and process it line-by-line. Allow the user to run the program repeatedly with different files until they signal that they are done by entering the word "exit".

REQUIREMENTS

1. The user may enter the word "exit" in upper or lowercase to exit the program.
2. Just as with all your programs, you should define additional helper methods to simplify your program and/or to eliminate redundancy. At a minimum, you should have a method that processes the file line-by-line and a separate method that capitalizes a single word.
3. You should define a method to capitalize a word. This method should accept a string parameter and return a capitalized string as its return value. Capitalizing a word means to change the first character to uppercase and all others to lower case. Note that capitalizing a word does not affect non-alphabetic data (such as numbers). Also, note that we are capitalizing tokens, which misses capitalizing words that are not white-space delimited (e.g., the capitalization of "ta-nehisi" is "Ta-nehisi", and not "Ta-Nehisi").
4. The output lines must be left justified. It is okay to have an extra space character at the end of each line. The capitalized words are separated by a single space in the output regardless of the number of white spaces that separated the words in the input file.

Answer 1

import java.io.File;
import java.io.FileNotFoundException;
import java.util.Scanner;

public class Capitalize {

   //to capitalize a word
   static String capitailizeWord(String str) {
       StringBuffer s = new StringBuffer();
       char ch = ' ';
       for (int i = 0; i < str.length(); i++) {
           if (ch == ' ' && str.charAt(i) != ' ')
               s.append(Character.toUpperCase(str.charAt(i)));
           else
               s.append(str.charAt(i));
           ch = str.charAt(i);
       }
       return s.toString().trim();
   }
   public static void main(String args[]) {
       Scanner input = new Scanner(System.in);
       String fileName = "";
       File file ;
      
       //this while loop is to ask weather user wants run the programme again or not
       while(true)
       {
           //this is for correct file purpose
           while(true)
           {
               System.out.print("Enter Name of the file to be processed :");
               fileName = input.nextLine();
               file = new File(fileName);
               if(file.exists()) {
                   //if file is exist proceeding
                   System.out.println("------Captalizing file contents-----");
                   try {
               Scanner sc = new Scanner(file);
               while (sc.hasNextLine()) {
                   //calling
                   System.out.println(capitailizeWord(sc.nextLine().toLowerCase()));
               }
               sc.close();
               }
               catch (FileNotFoundException e) {
               e.printStackTrace();
               }
                   break;
               }
               else {
                   System.out.println("File Not Exist. Please Try again");
               }
           }
           System.out.println("\nType \"exit\" to exit the programme or press enter key to continue :");
           if(input.nextLine().equalsIgnoreCase("exit")) {
               System.out.println("----Thank You------");
               break;
           }
       }
   }
}