I’m creating a Java program that can load different text documents (in this case, the first chapter or so of four different novels) and then print them out in order of their vocabulary ranks. In other words, they are ranked based on how many times words are repeated in the chapter. This program includes three classes:
hw5.java:
public class hw5 {
//main method
public static void main(String[] args) throws FileNotFoundException {
//stores user entered data
String userInput = "";
//Scanner class object created
Scanner in = new Scanner(System.in);
System.out.println("Write a file name to include in your ranks, '?' to list ranks, and ! to exit program");
//Accepts user choice and loops while user choice is not "!"
while(!userInput.equals("!")) {
System.out.print(">> ");
userInput = in.next();
//if user choice is "!", the program stops
if (userInput.equals("!")) {
System.out.println("nGood Bye :)");
}
//if user choice is "?", the program stops
else if(userInput.equals("?")) {
//calls printRanks() method from StoryRanker to display file name and word count
StoryRanker.printRanks();
}
//Otherwise it's a file name
else {
//Uses default constructor to pass the file name to Story class
Story myStory = new Story(userInput);
//if getWordCount method from Story is greater than 0, call addStory() method from StoryRanker and pass the object
if(myStory.getWordCount()>0) {
StoryRanker.addStory(myStory);
}
}
}
}
}
Story.java:
public class Story {
//stores word count
int wordCount;
//stores file name
String title;
//Scanner class object for reading file
Scanner fileRead;
//file object
File file;
//Constructor for receiving file name
Story(String fileName){
//initializes file object by file name
file = new File(fileName);
//extracts file extension
title = fileExtension(fileName);
}
//Method that returns number of words in the file
int getWordCount() {
//try block
try {
//file is read
fileRead = new Scanner(file);
//Checks for data
while(fileRead.hasNextLine()) {
//Word is read
fileRead.next();
//wordCount increases
wordCount++;
}
//File is closed
fileRead.close();
}
//Catch for FileNotFoundException
catch (FileNotFoundException e) {
System.out.println("File Not Found");
}
//returns wordCount
return wordCount;
}
//method that returns file name from complete file name with extension
static String fileExtension(String str) {
//null case
if(str == null) {
return null;
}
//gets position of last "."
int pos = str.lastIndexOf(".");
//if there's no "." return the string as it is
if(pos == -1) {
return str;
}
//returns string up to "."
return str.substring(0,pos);
}
}
and StoryRanker.java:
class Data {
//Stores file name
String fileName;
//stores word count
int wordCount;
}
class MyNewStack{
//stores 100 file names and word count
Data myData[] = new Data[100];
//points to top
int top;
//stores length
int length;
//default constructor
void MyNewStack() {
top = -1;
length = 0;
}
//Returns false if top = -1, but otherwise returns true
boolean isEmpty() {
if(top == -1) {
return false;
}
else {
return true;
}
}
//method pushes object to stack
void push (Data d) {
//Checks is stack is full
if (top == 99) {
System.out.println("Stack is full");
}
//if stack isn't full
else {
//increases top position of stack by one
++top;
//instantiates the array top index position
myData[top] = new Data();
//Stores file name and word count
myData[top].fileName = d.fileName;
myData[top].wordCount = d.wordCount;
//increases length by one
length++;
}
}
//method to pop the stack top position
Data pop() {
//if stack top is less than zero, the stack is empty
if(top<0) {
System.out.println("Stack Underflow.");
return null;
}
//Otherwise, decrease length by one and return stack top position object
else {
length--;
return myData[top--];
}
}
//method to return stack a position
Data peek(int a) {
//if stack top is less than zero, the stack is empty
if(top < 0) {
System.out.println("Stack underflow.");
return null;
}
//otherwise returns stack a position object
else {
return myData[a];
}
}
}
//establish StoryRanker public class
public class StoryRanker {
//MyNewStack class objects
static MyNewStack stack1 = new MyNewStack();
static MyNewStack stack2 = new MyNewStack();
//Data class object
static Data d = new Data();
//Method to add file name and word count to stack
public static void addStory(Story myStory) {
//Extract data from myStory and store it in Data object
d.fileName = myStory.title;
d.wordCount = myStory.wordCount;
//checks if stack is not empty
if(!stack1.isEmpty()) {
//Push object to first stack
stack1.push(d);
}
else {
//loops until first stack top position
for(int a = 0; a <= stack1.top; a++) {
//if stack word count is less than current file word count
if(stack1.peek(a).wordCount < myStory.wordCount) {
//Push object to second stack
stack2.push(stack1.pop());
}
}
//puush current object to first stack
stack1.push(d);
//for loop until second stack top position
for(int a = 0; a < stack2.length; a++) {
//extracts second stack object and pushes it to first stack
stack1.push(stack2.pop());
}
}
}
//Method to display first stack contents
public static void printRanks() {
//loops until first stack top position
for(int a = 0; a <= stack1.top; a++) {
System.out.println((a+1)+ ": " + stack1.peek(a).fileName + ", size = " + stack1.peek(a).wordCount);
}
}
}
And here is what it should look like when running the program:
Write a file name to include your ranks, '?' to list ranks, and ! to exit program >>the_boy_who_lived.txt >>? 1: the_boy_who_lived, size= 392. >>dracula_chapter1.txt >>? 1: dracula_chapter1, size= 1309. 2: the_boy_who_lived, size= 392. >>! Good Bye :)
The problem I’m running into is that whenever I enter one of the files I am using, it keeps returning “File Not Found.” I’ve tried typing in the entire address, including the .txt at the end, and nothing seems to be going through. Is there anyone who can help me?
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Answer
Story(String fileName){
//initializes file object by file name
String directory = "C:\Users\stlp\IdeaProjects\StoryCount\src.\" + fileName + ".txt";
file = new File(directory);
//extracts file extension
title = fileExtension(fileName);
}
Replace the first string of directory with your actual absolute directory. Make sure to include the double slashes. When inputting the file name, you want to put in just the name as the .txt is appended already.