/*
    TestSet.java
    CIS 160
    David Klick
    2009-12-01

    Demonstration of HashSet class.
*/

import java.util.HashSet;
import java.util.Scanner;
import java.util.Set;

public class TestSet {
    public static void main(String[] args) {
        Set<String> words = new HashSet<String>();
        Scanner in = new Scanner(System.in);
        String strIn = "";
        do {
            System.out.print("Enter a word (ENTER to exit): ");
            strIn = in.nextLine();
            if (strIn.length() > 0) {
                if (words.add(strIn)) {
                   System.out.println(strIn + " added to set");
                } else {
                   System.out.println("Duplicate detected: " + strIn + " not added to set");
                }
            }
        } while (strIn.length() > 0);
      
        System.out.println("\nWords in set:");
        for (String s : words) System.out.println(s);
    }
}

/*
    Sample run:

    Enter a word (ENTER to exit): hi
    hi added to set
    Enter a word (ENTER to exit): there
    there added to set
    Enter a word (ENTER to exit): how
    how added to set
    Enter a word (ENTER to exit): are
    are added to set
    Enter a word (ENTER to exit): you
    you added to set
    Enter a word (ENTER to exit): hi
    Duplicate detected: hi not added to set
    Enter a word (ENTER to exit): there
    Duplicate detected: there not added to set
    Enter a word (ENTER to exit):

    Words in set:
    hi
    how
    are
    there
    you
*/