import java.io.File;
import java.io.IOException;
import java.util.Collection;
import java.util.Comparator;
import java.util.HashSet;
import java.util.Scanner;
import java.util.Set;
import java.util.TreeSet;
import javax.swing.JOptionPane;
import javax.swing.JScrollPane;
import javax.swing.JTextArea;


/**
 *
 * @author Bill Kraynek
 *
 * COP3337 Example
 */
public class SetsExample {

    /**
     * @param args the command line arguments
     */
    public static void main(String[] args) throws IOException {
        Set<String> words = new HashSet<>();
        Set<String> sortedWords = new TreeSet<>();
        Set<String> sortedIgnoreCaseWords = new TreeSet<>(new IgnoreCaseComparator());
        Set<String> sortedLengthWords = new TreeSet<>(new StringLengthComparator());
        Scanner scanner = new Scanner(new File("src/SetsExample.java"));
        scanner.useDelimiter("[^a-zA-Z]+");
        while( scanner.hasNext() ) {
            String aWord = scanner.next();
            words.add(aWord);
            sortedWords.add(aWord);
            sortedIgnoreCaseWords.add(aWord);
            sortedLengthWords.add(aWord);
        }// end while
        display(words);
        display(sortedWords);
        display(sortedIgnoreCaseWords);
        display(sortedLengthWords);
    }
    
    public static <T> void display(Collection<T> collection) {
        String out = "";
        for( T x : collection) {
            out += x + "\n";
        }// end for
        out += "\n";
        JOptionPane.showMessageDialog(null,new JScrollPane(new JTextArea(out,30,30)));
    }
    
    static class IgnoreCaseComparator implements Comparator<String> {
        public int compare(String lhs, String rhs) {
            return lhs.compareToIgnoreCase(rhs);
        }
    }

    static class StringLengthComparator implements Comparator<String> {
        public int compare(String lhs, String rhs) {
            int diff = rhs.length() - lhs.length();
            if( diff != 0 ) return diff;
            return lhs.compareToIgnoreCase(rhs);
        }
    }

}