/*****************************************************************************
 *    This demonstrates soring in Java
 *
 *****************************************************************************/

import java.util.*;

public class SortDemo
{
//@SuppressWarnings("unchecked")
	public static void main(String[] args)
	{
		//sort an array of strings using natural ordering
		String[] words1 = {"Fred","bob","Tom","Mark","john","Steve"};
		Arrays.sort(words1);
		System.out.println(Arrays.toString(words1));

		String[] words2 = {"Fred","bob","Tom","Mark","john","Steve"};
		Arrays.sort(words2, new Comp1());
		System.out.println(Arrays.toString(words2));

		//sort in reverse order
		String[] words3 = {"Fred","Bob","Tom","Mark","John","Steve"};
		Arrays.sort(words3, new Comp2());
		System.out.println(Arrays.toString(words3));

		//sort by emails
		String[] words4 = {"Fred@cmu.edu","Bob@yahoo.com",
		"Tom@gmail.com","Mark@ucla.edu","John@pit.edu","Steve@microsoft.com"};
		Arrays.sort(words4, new Comp3());
		System.out.println(Arrays.toString(words4));
    }
}

class Comp1 implements Comparator<String>
{
	public int compare(String obj1, String obj2)
	{
		return obj1.compareToIgnoreCase(obj2);
	}
}

class Comp2 implements Comparator<String>
{
	public int compare(String obj1, String obj2)
	{
		return obj2.compareTo(obj1);
	}
}

class Comp3 implements Comparator<String>
{
	public int compare(String obj1, String obj2)
	{
		String str1 = obj1.substring( obj1.indexOf("@") );
		String str2 = obj2.substring( obj2.indexOf("@") );
		return str1.compareToIgnoreCase(str2);
	}
}