import java.util.*;

class CollectionTest {
    public static void main(String[] args) {

        LinkedList<String> list = Story.getTextAsLinkedList();

        
        // ex a & b
        System.out.println("# words: " + list.size());
        System.out.println("word at pos 45: " + list.get(45));

        // ex c
        Set<String> set = new HashSet<String>(list);
        System.out.println("\n# different words: " + set.size());

        // ex d
        // The iterator of treeset will return the elements in 
        // alphabetic order, as it will use the order of the
        // underlying elementtype - here String.
        Set<String> tSet = new TreeSet<String>(list);
        System.out.println("\n\nAll the words in alphabetic order\n---------------------------------");
        Iterator it = tSet.iterator();
        while(it.hasNext())
            System.out.print(it.next() + " ");
        // or alternatively - with the for-loop
        System.out.println("\n\nAll the words in alphabetic order again\n---------------------------------");
        for(String s: tSet)
            System.out.print( s + " ");

         // ex e
        System.out.println("\n\nPrinting all the words and frequency\n------------------------------------");
        SortedMap<String, Integer> map = new TreeMap<String,Integer>();
        // first add all elements to a map, 
        // where the key is the word so identical words become identical keys
        for( String word: list) {
            int value = 0;
            if(map.containsKey(word))
                value = map.get(word); // get the count
            map.put(word, value+1);
        }

        // now print all keys (the words) and their counts...
        // The for loop might look a bit cryptical. What it says is
        // For each entry en the entrySet of the map do the body.
        // Map.Entry<String,Integer> is the type of each entry
        for( Map.Entry<String,Integer> entry: map.entrySet() )
            System.out.print("["+ entry.getKey() + ", " + entry.getValue()+"] ");
        

        // f
        // iterate over the list and ...
        System.out.println("\nprint all words with size 6 or greater\n");
        for(String word: list)
            if (word.length()>=6)
                System.out.print(word + " ");
    }
}