Chapter 9. PC #14. Word Separator (modified *** Read carefully ***) Write a program that prompts the user to enter a file name, then opens the file in text mode and reads it line by line. While entering the file name, the program should allow the user to type quit to exit the program. If the file with a given name does not exist, then display a message and allow the user to re-enter the file name. The file can contain one or more sentences. The program should accept as input each sentence in which all the words are run together, but the first character of each word is uppercase. Convert sentences to strings in which the words are separated by spaces and only the first word starts with an uppercase letter. For example, the string StopAndSmellTheRoses.” would be converted to “Stop and smell the roses.” Sentences are separated by periods ('.'), exclamation marks ('!'), or question marks ('?'). Ensure that there is one space character in between sentences. text1.txt StopAndSmellTheRoses. text2.txt ATrueRebelYouAre!EveryoneWasImpressed.You'llDoWellToContinueInTheSameSpirit. PleaseExplainABitMoreInTheWayOfFootnotes.FromTheGivenTextIt'sNotClearWhatAreWeReadingAbout. Test Case 1 Please enter the file name or type QUIT to exit:\n text1.txtENTER Stop and smell the roses.\n Test Case 2 Please enter the file name or type QUIT to exit:\n txt1.txtENTER File 'txt1.txt' is not found.\n Please re-enter the file name or type QUIT to exit:\n text1.txtENTER Stop and smell the roses.\n Test Case 3 Please enter the file name or type QUIT to exit:\n text2.txtENTER A true rebel you are! Everyone was impressed. You'll do well to continue in the same spirit.\n Please explain a bit more in the way of footnotes. From the given text it's not clear what are we reading about.\n Test Case 4 Please enter the file name or type QUIT to exit:\n somefile.txtENTER File 'somefile.txt' is not found.\n Please re-enter the file name or type QUIT to exit:\n anotherbadfile.txtENTER File 'anotherbadfile.txt' is not found.\n Please re-enter the file name or type QUIT to exit:\n quitENTER
import java.io.BufferedReader;
import java.io.FileReader;
import java.io.IOException;
import java.util.HashMap;
import java.util.Map;
import java.util.Scanner;
public class MorseCodeConverter {
public static void main(String[] args) {
Map<String, String> morseCodeMap = readMorseCodeTable("morse.txt");
Scanner scanner = new Scanner(System.in);
System.out.print("Please enter the file name or type QUIT to exit:\n");
do{
String fileName = scanner.nextLine().trim();
if (fileName.equalsIgnoreCase("QUIT")) {
break;
}
try {
String text = convertMorseCodeToText(fileName, morseCodeMap);
System.out.println(text);
break;
} catch (IOException e) {
System.out.println("File '" + fileName + "' is not found.");
System.out.print("Please re-enter the file name or type QUIT to exit:\n");
}
}while(true);
scanner.close();
}
private static Map<String, String> readMorseCodeTable(String fileName) {
Map<String, String> morseCodeMap = new HashMap<>();
try (BufferedReader reader = new BufferedReader(new FileReader(fileName))) {
String line;
while ((line = reader.readLine()) != null) {
String[] parts = line.split("\\s+");
if (parts.length == 2) {
morseCodeMap.put(parts[1], parts[0]);
}
}
} catch (IOException e) {
e.printStackTrace();
}
return morseCodeMap;
}
private static String convertMorseCodeToText(String fileName, Map<String, String> morseCodeMap) throws IOException {
StringBuilder result = new StringBuilder();
try (BufferedReader reader = new BufferedReader(new FileReader(fileName))) {
String line;
while ((line = reader.readLine()) != null) {
String[] morseWords = line.split("\\s{3,}");
for (String morseWord : morseWords) {
String[] morseLetters = morseWord.split("\\s+");
for (String morseLetter : morseLetters) {
if (morseCodeMap.containsKey(morseLetter)) {
result.append(morseCodeMap.get(morseLetter));
}
}
}
result.append("\n");
}
}
return result.toString().trim();
}
}
Code instructions down below:
text1.txt
PleaseExplainABitMoreInTheWayOfFootnotes.FromTheGivenTextIt'sNotClearWhatAreWeReadingAbout.
Test Case 1
text1.txtENTER
Stop and smell the roses.\n
Test Case 2
txt1.txtENTER
File 'txt1.txt' is not found.\n
Please re-enter the file name or type QUIT to exit:\n
text1.txtENTER
Stop and smell the roses.\n
Test Case 3
text2.txtENTER
A true rebel you are! Everyone was impressed. You'll do well to continue in the same spirit.\n
Please explain a bit more in the way of footnotes. From the given text it's not clear what are we reading about.\n
Test Case 4
somefile.txtENTER
File 'somefile.txt' is not found.\n
Please re-enter the file name or type QUIT to exit:\n
anotherbadfile.txtENTER
File 'anotherbadfile.txt' is not found.\n
Please re-enter the file name or type QUIT to exit:\n
quitENTER
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