What is a NavigableMap in Java?

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Pragya Keshap answered on May 25, 2022 Popularity 5/10 Helpfulness 1/10

answer What is a NavigableMap in Java?

related Java How to use NavigableMap?

What is a NavigableMap in Java?

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As the name suggests, NavigableMap provides the capability to

navigate the keys of a Map in Java. A NavigableMap extends

SortedMap interface.

Some of the interesting methods of a NavigableMap are

descendingKeySet(), descendingMap(), headMap() and tailMap().

import java.util.*;
 
class TraversalExample {
   
    public static void main(String args[])
    {
        // Instantiate an object
        // Since NavigableMap is an interface
        // We use TreeMap
        NavigableMap<Integer, String> nmap
            = new TreeMap<Integer, String>();
 
        // Add elements using put()
        nmap.put(3, "Geeks");
        nmap.put(2, "For");
        nmap.put(1, "Geeks");
 
        // Create an Iterator over the
        // NavigableMap
        Iterator<NavigableMap.Entry<Integer, String> > itr
            = nmap.entrySet().iterator();
 
        System.out.println("Traversing using Iterator: ");
        // The hasNext() method is used to check if there is
        // a next element The next() method is used to
        // retrieve the next element
        while (itr.hasNext()) {
            NavigableMap.Entry<Integer, String> entry
                = itr.next();
            System.out.println("Key = " + entry.getKey()
                               + ", Value = "
                               + entry.getValue());
        }
 
        System.out.println("Traversing using for-each: ");
        // Iterate using for-each loop
        for (Map.Entry mapElement : nmap.entrySet()) {
            // get the key using getKey()
            int key = (int)mapElement.getKey();
 
            // Finding the value
            String value = (String)mapElement.getValue();
 
            System.out.println("Key = " + key
                               + ", Value = " + value);
        }
    }
}

https://www.geeksforgeeks.org/navigablemap-interface-in-java-with-example/

Popularity 5/10 Helpfulness 1/10 Language java

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Tags: java

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Contributed on Feb 04 2023

Pragya Keshap

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Java How to use NavigableMap?

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// NavigableMap implementation by TreeMap class
NavigableMap<Key, Value> numbers = new TreeMap<>();

Popularity 6/10 Helpfulness 2/10 Language java

Source: Grepper

Tags: java

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Contributed on May 25 2022

SAMER SAEID

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What is a NavigableMap in Java?

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