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What is the advantage of NavigableMap over Map?

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Pragya Keshap answered on February 4, 2023 Popularity 1/10 Helpfulness 1/10

answer What is the advantage of NavigableMap over Map?

What is the advantage of NavigableMap over Map?

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The main advantage of NavigableMap over Map is the Navigation

capability.

It provides the capabilities of a Map, SortedMap and navigation in

one collection.

It even returns the closest matches for given search targets.

Methods like lowerEntry, floorEntry, ceilingEntry, and higherEntry

return Map.Entry objects associated with keys respectively less

than, less than or equal, greater than or equal, and greater than a

given key.

Methods like lowerKey, floorKey, ceilingKey, and higherKey return

only the associated keys. All of these methods are designed for

locating, not traversing entries

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 1/10 Helpfulness 1/10 Language java

Source: Grepper

Tags: java

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Contributed on Feb 04 2023

Pragya Keshap

0 Answers Avg Quality 2/10

What is the advantage of NavigableMap over Map?

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