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import java.util.*;

/**

* Description:

* <br/>网站: <a href="http://www.crazyit.org">疯狂Java联盟</a>

* <br/>Copyright (C), 2001-2012, Yeeku.H.Lee

* <br/>This program is protected by copyright laws.

* <br/>Program Name:

* <br/>Date:

* @author Yeeku.H.Lee kongyeeku@163.com

* @version 1.0

*/

public class TreeSetTest

{

public static void main(String[] args)

{

// Comparator的实际类型是TreeSet里实际类型的父类，满足要求

TreeSet<String> ts1 = new TreeSet<>(

new Comparator<Object>()

{

public int compare(Object fst, Object snd)

{

return hashCode() > snd.hashCode() ? 1

: hashCode() < snd.hashCode() ? -1 : 0;

}

});

ts1.add("hello");

ts1.add("wa");

TreeSet<String> ts2 = new TreeSet<>(

new Comparator<String>()

{

public int compare(String first, String second)

{

return first.length() > second.length() ? -1

: first.length() < second.length() ? 1 : 0;

}

});

ts2.add("hello");

ts2.add("wa");

System.out.println(ts1);

System.out.println(ts2);

}

}