import java.io.*;

public class Test105 {

	//  Read a text file from disk given the filename
	//  as a String
	//
	//  Return a single String consisting of each line
	//  of the file appended together.  The text should
	//  be converted to lower case before returning.
	public static String readFile(String filename) {

		//Code used to test.  Change this when the
		//method is implemented
		return "this is a small test string";
	}

	//  Split a single String of words up into a String[]
	//  based on white space.  This code is complete and
	//  does not need changing.
	public static String[] split(String source) {
		return source.split("\\s");
	}

	//  Sort the words contained in an array of Strings
	//  into order based on the length of the Strings.  If
	//  the Strings are equal in length then they should be
	//  ordered alphabetically.
	public static void sort(String[] source) {

	}

	//  Swap two elements of an array
	public static void swap(String[] data, int i, int j) {

	}

	//  Ensure that only one copy of each word appears in
	//  the array.  Any subsequent copy of a given word should
	//  be set to null.
	public static void removeDuplicates(String[] source) {


	}

	//  Given an array of values that contains some null elements,
	//  print the elements that are not null.
	public static void printArray(String[] source) {

	}

	//Read a file called "test.txt", store each individual
	//word in an array of Strings, sort the words, remove
	//the duplicate entries and print the list of unique
	//words.
	public static void main(String[] args) {
		//read in the file from disk
		String contents = readFile("test.txt");

		//break it up into words
		String[] words = split(contents);

		//sort the words into order
		sort(words);

		//remove duplicate words
		removeDuplicates(words);

		//print the words
		printArray(words);
	}


}