Mega Code Archive
TreeSet Demo
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/*
* Copyright (c) Ian F. Darwin, http://www.darwinsys.com/, 1996-2002.
* All rights reserved. Software written by Ian F. Darwin and others.
* $Id: LICENSE,v 1.8 2004/02/09 03:33:38 ian Exp $
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS''
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
* Java, the Duke mascot, and all variants of Sun's Java "steaming coffee
* cup" logo are trademarks of Sun Microsystems. Sun's, and James Gosling's,
* pioneering role in inventing and promulgating (and standardizing) the Java
* language and environment is gratefully acknowledged.
*
* The pioneering role of Dennis Ritchie and Bjarne Stroustrup, of AT&T, for
* inventing predecessor languages C and C++ is also gratefully acknowledged.
*/
import java.util.TreeSet;
/**
* TreeSet Demo.
*
* @author Ian F. Darwin, http://www.darwinsys.com/
* @version $Id: TreeSetDemo.java,v 1.3 2004/02/09 03:34:04 ian Exp $
*/
public class TreeSetDemo {
public static void main(String[] argv) {
//+
/*
* A TreeSet keeps objects in sorted order. We use a Comparator
* published by String for case-insensitive sorting order.
*/
TreeSet tm = new TreeSet(String.CASE_INSENSITIVE_ORDER);
tm.add("Gosling");
tm.add("da Vinci");
tm.add("van Gogh");
tm.add("Java To Go");
tm.add("Vanguard");
tm.add("Darwin");
tm.add("Darwin"); // TreeSet is Set, ignores duplicates.
// Since it is sorted we can ask for various subsets
System.out.println("Lowest (alphabetically) is " + tm.first());
// Print how many elements are greater than "k"
System.out.println(tm.tailSet("k").toArray().length
+ " elements higher than \"k\"");
// Print the whole list in sorted order
System.out.println("Sorted list:");
java.util.Iterator t = tm.iterator();
while (t.hasNext())
System.out.println(t.next());
//-
}
}
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