Mega Code Archive
This program uses a set to print all unique words in System in
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/*
This program is a part of the companion code for Core Java 8th ed.
(http://horstmann.com/corejava)
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
import java.util.HashSet;
import java.util.Iterator;
import java.util.Scanner;
import java.util.Set;
/**
* This program uses a set to print all unique words in System.in.
* @version 1.10 2003-08-02
* @author Cay Horstmann
*/
public class SetTest
{
public static void main(String[] args)
{
Set<String> words = new HashSet<String>(); // HashSet implements Set
long totalTime = 0;
Scanner in = new Scanner(System.in);
while (in.hasNext())
{
String word = in.next();
long callTime = System.currentTimeMillis();
words.add(word);
callTime = System.currentTimeMillis() - callTime;
totalTime += callTime;
}
Iterator<String> iter = words.iterator();
for (int i = 1; i <= 20 && iter.hasNext(); i++)
System.out.println(iter.next());
System.out.println(". . .");
System.out.println(words.size() + " distinct words. " + totalTime + " milliseconds.");
}
}
]]>