42 lines
1.2 KiB
Java
42 lines
1.2 KiB
Java
// understandingcollections/SortedSetDemo.java
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// (c)2016 MindView LLC: see Copyright.txt
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// We make no guarantees that this code is fit for any purpose.
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// Visit http://mindviewinc.com/Books/OnJava/ for more book information.
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// What you can do with a TreeSet
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import java.util.*;
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public class SortedSetDemo {
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public static void main(String[] args) {
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SortedSet<String> sortedSet = new TreeSet<>();
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Collections.addAll(sortedSet,
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"one two three four five six seven eight"
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.split(" "));
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System.out.println(sortedSet);
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String low = sortedSet.first();
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String high = sortedSet.last();
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System.out.println(low);
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System.out.println(high);
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Iterator<String> it = sortedSet.iterator();
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for(int i = 0; i <= 6; i++) {
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if(i == 3) low = it.next();
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if(i == 6) high = it.next();
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else it.next();
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}
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System.out.println(low);
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System.out.println(high);
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System.out.println(sortedSet.subSet(low, high));
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System.out.println(sortedSet.headSet(high));
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System.out.println(sortedSet.tailSet(low));
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}
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}
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/* Output:
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[eight, five, four, one, seven, six, three, two]
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eight
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two
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one
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two
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[one, seven, six, three]
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[eight, five, four, one, seven, six, three]
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[one, seven, six, three, two]
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*/
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