import java.util.Scanner; public class AuthoringAssistant { // Creates an instance of Scanner class object private static Scanner scanner = new Scanner(System.in); /** * * The method that replaces two or more sapces with single spaces * */ private static String shortenSpace(String text) { String temp = text.trim().replaceAll(\" +\", \" \"); return temp; } /** * The method replaces all exclamation marks with character \'.\' * */ private static String replaceExclamation(String text) { String temp = text.replaceAll(\"!\", \".\"); return temp; } /** * The method findText that finds the number of occurenence of find in text * and returns the count * */ private static int findText(String text, String find) { int count = 0; int i = 0; while ((i = text.indexOf(find)) != -1) { text = text.substring(i + find.length()); count += 1; } return count; } /** * the method takes a string and returns the number of words in the text. * */ private static int getNumOfWords(String text) { // call split method that returns the array of words // split by spaces text = shortenSpace(text); String[] words = text.split(\" \"); // return count of words return words.length; } /* * The method getNumOfNonWSCharacters that remmoves the whitepsaces and * returns the lenght of the text */ private static int getNumOfNonWSCharacters(String text) { text = text.trim().replaceAll(\"\\\\s\", \"\"); return text.length(); } /** * The method printMenu that prints a menu of choices and prompts user to * enter choice. * */ private static void printMenu() { System.out.println(\"\ MENU\"); System.out.println(\"c - Number of non-whitespace characters\"); System.out.println(\"w - Number of words\"); System.out.println(\"f - Find text\"); System.out.println(\"r - Replace all !\'s\"); System.out.println(\"s - Shorten spaces\"); System.out.println(\"q - Quit\"); System.out.println(\"\ Choose an option: \"); } public static void main(String[] args) { while(true) { //prompt for the text System.out.println(\"Enter a sample text: \"); String text = scanner.nextLine(); //Display user input System.out.println(\"You entered: \" + text); //Display menu printMenu(); char ch = scanner.nextLine().charAt(0); switch (ch) { case \'q\': // close the program // System.out.println(\"Exit the program\"); System.exit(0); case \'c\': // Number of non-whitespace characters int cntNonWhitespaces = getNumOfNonWSCharacters(text); System.out.println(\"Number of non-whitespace characters: \" + cntNonWhitespaces); break; case \'w\': // Number of words int wordsCount = getNumOfWords(text); System.out.println(\"Number of words: \" + wordsCount); break; case \'f\': // Find text System.out.println(\"Enter a word or phrase to be found: \"); String find = scanner.nextLine(); int findCount = findText(text, find); System.out.println(\"\\\"\" + find + \"\\\" instances: \" + findCount); break; case \'r\': // Replace all !\'s String newstring = replaceExclamation(text); System.out.println(\"Edited text: \" + newstring); break; case .

1. import java.util.Scanner;
public class AuthoringAssistant {
// Creates an instance of Scanner class object
private static Scanner scanner = new Scanner(System.in);
/**
*
* The method that replaces two or more sapces with single spaces
* */
private static String shortenSpace(String text) {
String temp = text.trim().replaceAll(" +", " ");
return temp;
}
/**
* The method replaces all exclamation marks with character '.'
* */
private static String replaceExclamation(String text) {
String temp = text.replaceAll("!", ".");
return temp;
}
/**
* The method findText that finds the number of occurenence of find in text
* and returns the count
* */
private static int findText(String text, String find) {
int count = 0;
int i = 0;
while ((i = text.indexOf(find)) != -1) {
text = text.substring(i + find.length());
count += 1;
}
return count;
}
/**
* the method takes a string and returns the number of words in the text.

2. * */
private static int getNumOfWords(String text) {
// call split method that returns the array of words
// split by spaces
text = shortenSpace(text);
String[] words = text.split(" ");
// return count of words
return words.length;
}
/*
* The method getNumOfNonWSCharacters that remmoves the whitepsaces and
* returns the lenght of the text
*/
private static int getNumOfNonWSCharacters(String text) {
text = text.trim().replaceAll("s", "");
return text.length();
}
/**
* The method printMenu that prints a menu of choices and prompts user to
* enter choice.
* */
private static void printMenu() {
System.out.println(" MENU");
System.out.println("c - Number of non-whitespace characters");
System.out.println("w - Number of words");
System.out.println("f - Find text");
System.out.println("r - Replace all !'s");
System.out.println("s - Shorten spaces");
System.out.println("q - Quit");
System.out.println(" Choose an option: ");
}
public static void main(String[] args) {
while(true) {
//prompt for the text
System.out.println("Enter a sample text: ");
String text = scanner.nextLine();

3. //Display user input
System.out.println("You entered: " + text);
//Display menu
printMenu();
char ch = scanner.nextLine().charAt(0);
switch (ch) {
case 'q':
// close the program
// System.out.println("Exit the program");
System.exit(0);
case 'c': // Number of non-whitespace characters
int cntNonWhitespaces = getNumOfNonWSCharacters(text);
System.out.println("Number of non-whitespace characters: " + cntNonWhitespaces);
break;
case 'w': // Number of words
int wordsCount = getNumOfWords(text);
System.out.println("Number of words: " + wordsCount);
break;
case 'f': // Find text
System.out.println("Enter a word or phrase to be found: ");
String find = scanner.nextLine();
int findCount = findText(text, find);
System.out.println(""" + find + "" instances: " + findCount);
break;
case 'r': // Replace all !'s
String newstring = replaceExclamation(text);
System.out.println("Edited text: " + newstring);
break;

4. case 's': // Shorten spaces
newstring = shortenSpace(text);
System.out.println("Edited text:" + newstring);
break;
default:
System.out.println("Invalid option. Please try again");
}
System.out.println();
}
}
}
SAMPLE OUTPUT:
Enter a sample text:
We'll continue our quest in space. There will be more shuttle flights and more
shuttle crews and, yes, more volunteers, more civilians, more teachers in space.
You entered: We'll continue our quest in space. There will be more shuttle flights
and more shuttle crews and, yes, more volunteers, more civilians, more teachers in space.
MENU
c - Number of non-whitespace characters
w - Number of words
f - Find text
r - Replace all !'s
s - Shorten spaces
q - Quit
Choose an option:
c
Number of non-whitespace characters: 134
Enter a sample text:
We'll continue our quest in space. There will be more shuttle flights and more
shuttle crews and, yes, more volunteers, more civilians, more teachers in space.
You entered: We'll continue our quest in space. There will be more shuttle flights
and more shuttle crews and, yes, more volunteers, more civilians, more teachers in space.
MENU
c - Number of non-whitespace characters

5. w - Number of words
f - Find text
r - Replace all !'s
s - Shorten spaces
q - Quit
Choose an option:
w
Number of words: 26
Enter a sample text:
We'll continue our quest in space. There will be more shuttle flights and more
shuttle crews and, yes, more volunteers, more civilians, more teachers in space.
You entered: We'll continue our quest in space. There will be more shuttle flights
and more shuttle crews and, yes, more volunteers, more civilians, more teachers in space.
MENU
c - Number of non-whitespace characters
w - Number of words
f - Find text
r - Replace all !'s
s - Shorten spaces
q - Quit
Choose an option:
f
Enter a word or phrase to be found:
more
"more" instances: 5
Enter a sample text:
We'll continue our quest in space. There will be more shuttle flights and more
shuttle crews and, yes, more volunteers, more civilians, more teachers in space.
You entered: We'll continue our quest in space. There will be more shuttle flights
and more shuttle crews and, yes, more volunteers, more civilians, more teachers in space.
MENU
c - Number of non-whitespace characters
w - Number of words
f - Find text
r - Replace all !'s
s - Shorten spaces

6. q - Quit
Choose an option:
f
Enter a word or phrase to be found:
more shuttle
"more shuttle" instances: 2
Enter a sample text:
We'll continue our quest in space. There will be more shuttle flights and more
shuttle crews and, yes, more volunteers, more civilians, more teachers in space.
You entered: We'll continue our quest in space. There will be more shuttle flights
and more shuttle crews and, yes, more volunteers, more civilians, more teachers in space.
MENU
c - Number of non-whitespace characters
w - Number of words
f - Find text
r - Replace all !'s
s - Shorten spaces
q - Quit
Choose an option:
r
Edited text: We'll continue our quest in space. There will be more shuttle flights
and more shuttle crews and, yes, more volunteers, more civilians, more teachers in space.
Enter a sample text:
We'll continue our! quest in space. There will be more shuttle flights and !more
shuttle crews and, yes, more volunteers, more civilians, more teachers in space.
You entered: We'll continue our! quest in space. There will be more shuttle flights
and !more shuttle crews and, yes, more volunteers, more civilians, more teachers in space.
MENU
c - Number of non-whitespace characters
w - Number of words
f - Find text
r - Replace all !'s
s - Shorten spaces
q - Quit
Choose an option:
r

7. Edited text: We'll continue our. quest in space. There will be more shuttle flights
and .more shuttle crews and, yes, more volunteers, more civilians, more teachers in space.
Enter a sample text:
We'll continue our quest in space. There will be more shuttle flights and more
shuttle crews and, yes, more volunteers, more civilians, more teachers in space.
You entered: We'll continue our quest in space. There will be more shuttle flights
and more shuttle crews and, yes, more volunteers, more civilians, more teachers in space.
MENU
c - Number of non-whitespace characters
w - Number of words
f - Find text
r - Replace all !'s
s - Shorten spaces
q - Quit
Choose an option:
s
Edited text:We'll continue our quest in space. There will be more shuttle flights and more
shuttle crews and, yes, more volunteers, more civilians, more teachers in space.
Enter a sample text:
We'll continue our quest in space. There will be more shuttle flights and more
shuttle crews and, yes, more volunteers, more civilians, more teachers in space.
You entered: We'll continue our quest in space. There will be more shuttle flights
and more shuttle crews and, yes, more volunteers, more civilians, more teachers in space.
MENU
c - Number of non-whitespace characters
w - Number of words
f - Find text
r - Replace all !'s
s - Shorten spaces
q - Quit
Choose an option:
q
Solution
import java.util.Scanner;

8. public class AuthoringAssistant {
// Creates an instance of Scanner class object
private static Scanner scanner = new Scanner(System.in);
/**
*
* The method that replaces two or more sapces with single spaces
* */
private static String shortenSpace(String text) {
String temp = text.trim().replaceAll(" +", " ");
return temp;
}
/**
* The method replaces all exclamation marks with character '.'
* */
private static String replaceExclamation(String text) {
String temp = text.replaceAll("!", ".");
return temp;
}
/**
* The method findText that finds the number of occurenence of find in text
* and returns the count
* */
private static int findText(String text, String find) {
int count = 0;
int i = 0;
while ((i = text.indexOf(find)) != -1) {
text = text.substring(i + find.length());
count += 1;
}
return count;
}
/**
* the method takes a string and returns the number of words in the text.
* */
private static int getNumOfWords(String text) {

9. // call split method that returns the array of words
// split by spaces
text = shortenSpace(text);
String[] words = text.split(" ");
// return count of words
return words.length;
}
/*
* The method getNumOfNonWSCharacters that remmoves the whitepsaces and
* returns the lenght of the text
*/
private static int getNumOfNonWSCharacters(String text) {
text = text.trim().replaceAll("s", "");
return text.length();
}
/**
* The method printMenu that prints a menu of choices and prompts user to
* enter choice.
* */
private static void printMenu() {
System.out.println(" MENU");
System.out.println("c - Number of non-whitespace characters");
System.out.println("w - Number of words");
System.out.println("f - Find text");
System.out.println("r - Replace all !'s");
System.out.println("s - Shorten spaces");
System.out.println("q - Quit");
System.out.println(" Choose an option: ");
}
public static void main(String[] args) {
while(true) {
//prompt for the text
System.out.println("Enter a sample text: ");
String text = scanner.nextLine();
//Display user input

10. System.out.println("You entered: " + text);
//Display menu
printMenu();
char ch = scanner.nextLine().charAt(0);
switch (ch) {
case 'q':
// close the program
// System.out.println("Exit the program");
System.exit(0);
case 'c': // Number of non-whitespace characters
int cntNonWhitespaces = getNumOfNonWSCharacters(text);
System.out.println("Number of non-whitespace characters: " + cntNonWhitespaces);
break;
case 'w': // Number of words
int wordsCount = getNumOfWords(text);
System.out.println("Number of words: " + wordsCount);
break;
case 'f': // Find text
System.out.println("Enter a word or phrase to be found: ");
String find = scanner.nextLine();
int findCount = findText(text, find);
System.out.println(""" + find + "" instances: " + findCount);
break;
case 'r': // Replace all !'s
String newstring = replaceExclamation(text);
System.out.println("Edited text: " + newstring);
break;
case 's': // Shorten spaces
newstring = shortenSpace(text);

11. System.out.println("Edited text:" + newstring);
break;
default:
System.out.println("Invalid option. Please try again");
}
System.out.println();
}
}
}
SAMPLE OUTPUT:
Enter a sample text:
We'll continue our quest in space. There will be more shuttle flights and more
shuttle crews and, yes, more volunteers, more civilians, more teachers in space.
You entered: We'll continue our quest in space. There will be more shuttle flights
and more shuttle crews and, yes, more volunteers, more civilians, more teachers in space.
MENU
c - Number of non-whitespace characters
w - Number of words
f - Find text
r - Replace all !'s
s - Shorten spaces
q - Quit
Choose an option:
c
Number of non-whitespace characters: 134
Enter a sample text:
We'll continue our quest in space. There will be more shuttle flights and more
shuttle crews and, yes, more volunteers, more civilians, more teachers in space.
You entered: We'll continue our quest in space. There will be more shuttle flights
and more shuttle crews and, yes, more volunteers, more civilians, more teachers in space.
MENU
c - Number of non-whitespace characters
w - Number of words
f - Find text

12. r - Replace all !'s
s - Shorten spaces
q - Quit
Choose an option:
w
Number of words: 26
Enter a sample text:
We'll continue our quest in space. There will be more shuttle flights and more
shuttle crews and, yes, more volunteers, more civilians, more teachers in space.
You entered: We'll continue our quest in space. There will be more shuttle flights
and more shuttle crews and, yes, more volunteers, more civilians, more teachers in space.
MENU
c - Number of non-whitespace characters
w - Number of words
f - Find text
r - Replace all !'s
s - Shorten spaces
q - Quit
Choose an option:
f
Enter a word or phrase to be found:
more
"more" instances: 5
Enter a sample text:
We'll continue our quest in space. There will be more shuttle flights and more
shuttle crews and, yes, more volunteers, more civilians, more teachers in space.
You entered: We'll continue our quest in space. There will be more shuttle flights
and more shuttle crews and, yes, more volunteers, more civilians, more teachers in space.
MENU
c - Number of non-whitespace characters
w - Number of words
f - Find text
r - Replace all !'s
s - Shorten spaces
q - Quit
Choose an option:

13. f
Enter a word or phrase to be found:
more shuttle
"more shuttle" instances: 2
Enter a sample text:
We'll continue our quest in space. There will be more shuttle flights and more
shuttle crews and, yes, more volunteers, more civilians, more teachers in space.
You entered: We'll continue our quest in space. There will be more shuttle flights
and more shuttle crews and, yes, more volunteers, more civilians, more teachers in space.
MENU
c - Number of non-whitespace characters
w - Number of words
f - Find text
r - Replace all !'s
s - Shorten spaces
q - Quit
Choose an option:
r
Edited text: We'll continue our quest in space. There will be more shuttle flights
and more shuttle crews and, yes, more volunteers, more civilians, more teachers in space.
Enter a sample text:
We'll continue our! quest in space. There will be more shuttle flights and !more
shuttle crews and, yes, more volunteers, more civilians, more teachers in space.
You entered: We'll continue our! quest in space. There will be more shuttle flights
and !more shuttle crews and, yes, more volunteers, more civilians, more teachers in space.
MENU
c - Number of non-whitespace characters
w - Number of words
f - Find text
r - Replace all !'s
s - Shorten spaces
q - Quit
Choose an option:
r
Edited text: We'll continue our. quest in space. There will be more shuttle flights
and .more shuttle crews and, yes, more volunteers, more civilians, more teachers in space.

14. Enter a sample text:
We'll continue our quest in space. There will be more shuttle flights and more
shuttle crews and, yes, more volunteers, more civilians, more teachers in space.
You entered: We'll continue our quest in space. There will be more shuttle flights
and more shuttle crews and, yes, more volunteers, more civilians, more teachers in space.
MENU
c - Number of non-whitespace characters
w - Number of words
f - Find text
r - Replace all !'s
s - Shorten spaces
q - Quit
Choose an option:
s
Edited text:We'll continue our quest in space. There will be more shuttle flights and more
shuttle crews and, yes, more volunteers, more civilians, more teachers in space.
Enter a sample text:
We'll continue our quest in space. There will be more shuttle flights and more
shuttle crews and, yes, more volunteers, more civilians, more teachers in space.
You entered: We'll continue our quest in space. There will be more shuttle flights
and more shuttle crews and, yes, more volunteers, more civilians, more teachers in space.
MENU
c - Number of non-whitespace characters
w - Number of words
f - Find text
r - Replace all !'s
s - Shorten spaces
q - Quit
Choose an option:
q