// CSE 143, summer 2012
// Counts the number of words in a large file.                                               
// Demonstrates the use of a Set collection. 

import java.io.*;                               
import java.util.*;                                      
                                                                
public class WordCount {                                  
    public static void main(String[] args) throws FileNotFoundException {                                 
        
		  HashSet<String> words = new HashSet<String>();
		                                 
        long start = System.currentTimeMillis();                                         
                                      
        System.out.println("Reading file...");                               
        Scanner input = new Scanner(new File("smallmoby.txt"));                                                  
        // store words so that we can print them later                             
							
		  while(input.hasNext()) {
		  		String word = input.next();
		  		if (!words.contains(word)) {
		  			words.add(word);
				}
		  }				
												 
        long end = System.currentTimeMillis();                               
        long elapsed = end - start;                                 
                               
        System.out.println("The file has " + words.size() + " words.");                                                   
        System.out.println("Took " + elapsed + " ms."); 
        
        // print all of the unique words that are in the file
		  for (String word : words) {
		  		System.out.println(word);
		  }
    }                                   
}