Java : Collection Framework : TreeSet (higher)

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TreeSetExample.java

import java.util.TreeSet;

/*
 * Example of higher(E e) method.
 */
public class TreeSetExample
{
    public static void main( String[] args )
    {

        TreeSet<Integer> treeSet = new TreeSet<Integer>();

        treeSet.add(40);
        treeSet.add(20);
        treeSet.add(30);
        treeSet.add(10);
        treeSet.add(50);

        System.out.println("treeSet : " + treeSet + "\n");

        /*
         * Returns the least element in this set strictly greater than the given
         * element, or null if there is no such element.
         */

        Integer value = treeSet.higher(32);
        System.out.println("higher(32) : " + value);

        value = treeSet.higher(16);
        System.out.println("higher(16) : " + value);

        value = treeSet.higher(55);
        System.out.println("higher(55) : " + value);
    }
}

Output

treeSet : [10, 20, 30, 40, 50]

higher(32) : 40
higher(16) : 20
higher(55) : null

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