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Showing content from https://www.geeksforgeeks.org/java/concurrentskiplistset-descendingiterator-method-in-java/ below:

ConcurrentSkipListSet descendingIterator() method in Java

Last Updated : 17 Sep, 2018

The

descendingIterator()

method of

java.util.concurrent.ConcurrentSkipListSet

is an in-built function in Java which is used to return an iterator over the elements in this set in

descending order

Syntax:

ConcurrentSkipListSet.descendingIterator()

Return Value:

The function returns an iterator over the elements in this set in descending order. Below programs illustrate the ConcurrentSkipListSet.descendingIterator() method:

Program 1: Java


 // Java Program Demonstrate descendingIterator()
// method of ConcurrentSkipListSet 

import java.util.Iterator;
import java.util.concurrent.ConcurrentSkipListSet;

class ConcurrentSkipListSetIteratorExample1 {
    public static void main(String[] args)
    {

        // Initializing the set
        ConcurrentSkipListSet<String>
            set = new ConcurrentSkipListSet<String>();

        // Adding elements to this set
        set.add("Gfg");
        set.add("is");
        set.add("fun!!");

        // Returns an iterator over the elements
        Iterator<String> iterator = set.descendingIterator();

        // Printing the elements of the set
        while (iterator.hasNext())
            System.out.print(iterator.next() + " ");
    }
}

Program 2: Java


 // Java Program Demonstrate descendingIterator()
// method of ConcurrentSkipListSet 

import java.util.Iterator;
import java.util.concurrent.ConcurrentSkipListSet;

class ConcurrentSkipListSetIteratorExample1 {
    public static void main(String[] args)
    {

        // Initializing the set
        ConcurrentSkipListSet<Integer>
            set = new ConcurrentSkipListSet<Integer>();

        // Adding elements to this set
        set.add(10);
        set.add(15);
        set.add(20);
        set.add(25);

        // Returns an iterator over the elements
        Iterator<Integer> iterator = set.descendingIterator();

        // Printing the elements of the set
        while (iterator.hasNext())
            System.out.print(iterator.next() + " ");
    }
}

Reference: https://docs.oracle.com/javase/8/docs/api/java/util/concurrent/ConcurrentSkipListSet.html#descendingIterator--

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