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

/*********************************************************************
 * A representation of a simple text document without punctuation or
 * formatting (apart from line breaks). 
 *********************************************************************/
public class Document {

    // A two dimensional array of words. Each row in the array
    // represents a single line of text. Lines with no words are represented
    // as arrays of length 0.
    private String[][] words;
  
    /***********************************************************
     * Construct an empty document.
     ***********************************************************/
    public Document() 
    {
        words = new String[0][0];
    }

    
    /***********************************************************
     * Construct the document from a file. STUDENTS WON'T WRITE THIS.
     * 
     * @param fileName
     * @throws FileNotFoundException
     ***********************************************************/
    public Document(String fileName) throws FileNotFoundException {
        File file;
        Scanner docScanner;

        String curLine;
        int numLines = 0;
        file = new File(fileName);
        docScanner = new Scanner(file);

        // count lines...
        while (docScanner.hasNext()) {
            docScanner.nextLine();
            numLines++;
        }

        docScanner = new Scanner(file);
        words = new String[numLines][];

        for (int i = 0; i < words.length; i++) {
            curLine = docScanner.nextLine();
            words[i] = curLine.split("\\s");

            //splitting an empty string results in an array with a single
            //Empty string.  We want an empty array... 
            if (words[i][0].equals(""))
                words[i] = new String[0];
        }

    }

    /***********************************************************
     * Return the number of lines of text in this document.
     * 
     * @return Number of lines.
     ***********************************************************/
    public int numLines() {
	 
  		// Make me  
	 }

    /***********************************************************
     * Return the number of words in this document.
     * 
     * @return Number of words.
     ***********************************************************/
    public int numWords() {
        
		  // Make me

    }

    /***********************************************************
     * Return the indicated line of text as a single string.
     * 
     * @param lineNum
     *            The (0-indexed) line of text to return.
     * @return The requested line.
     * @throws NoSuchLineException
     *             If the indicated line does not exist in this document.
     ***********************************************************/
    public String getLine(int lineNum) throws NoSuchLineException 
	 {
  			// Make me      
    }

    /***********************************************************
     * Return the entire document as a single string. A single space will
     * separate each word on a line. Each line will be terminated with a 
     * newline character.
     * 
     * @param lineNum
     *            The (0-indexed) line of text to return.
     * @return The requested line.
     * @throws NoSuchLineException
     *             If the indicated line does not exist in this document.
     ***********************************************************/
    public String toString() 
	 {
  		// make me      
    }

    /***********************************************************
     * Save this document to a file.  The format is exactly the 
     * same as that described in the toString method (hint).
     * If the file already exists, it will be overwritten.  
     * If the file cannot be written, this method returns false.
     * 
     * @param fileName  - Name of the file to be written.
     * @return  true if the file was written, false otherwise
     ***********************************************************/
    public boolean saveDocument(String fileName) {
  	
		// make me  
	 }

}