Java Collections emptyNavigableMap() Method

The emptyNavigableMap() method of Java Collections class returns an empty navigable map which is immutable.

Syntax

Following is the declaration of emptyNavigableMap() method:

Parameter

This method does not accept any parameter.

Returns

The emptyNavigableMap() method returns an empty immutable Navigable Map.

Exceptions

Compatibility Version

Java 1.8 and above

Example 1

import java.util.*;
public class CollectionsEmptyNavigableMapExample1 {
	public static void main(String[] args) {		
	     //Create an empty Map   
	     NavigableMap<String,String> EmptyNavMap = Collections.emptyNavigableMap();
	     System.out.println("Created Empty Navigable Map: "+EmptyNavMap);
	     }	  
}

Test it Now

Output:

Created Empty Navigable Map: {}

Example 2

import java.util.*;
public class CollectionsEmptyNavigableMapExample2 {
	public static void main(String[] args) {		
	     //Create an empty Map    
	     NavigableMap<String,String> EmptyNavMap = Collections.emptyNavigableMap();
	     System.out.println("Created Empty Navigable Map: "+EmptyNavMap);
	     // try to add elements
	     EmptyNavMap.put("1","from JavaTpoint.com");
	     }	  
}

Test it Now

Output:

Created Empty Navigable Map: {}
Exception in thread "main" java.lang.UnsupportedOperationException
	at java.base/java.util.Collections$UnmodifiableMap.put(Collections.java:1453)
	at myPackage.CollectionsEmptyNavigableMapExample2.main(CollectionsEmptyNavigableMapExample2.java:9)

Example 3

import java.util.*;
public class CollectionsEmptyNavigableMapExample3 {
	public static void main(String[] args) {		
		//Create an empty Map   
	      NavigableMap<Integer, Integer> empNavMap = Collections.emptyNavigableMap();
	      empNavMap.put(1, 23424);
	      empNavMap.put(2, 65776);    
	      System.out.println("Created empty immutable Navigable Map: "+empNavMap);	     
	      }	  
}	

Test it Now

Output:

Exception in thread "main" java.lang.UnsupportedOperationException
	at java.base/java.util.Collections$UnmodifiableMap.put(Collections.java:1453)
	at myPackage.CollectionsEmptyNavigableMapExample3.main(CollectionsEmptyNavigableMapExample3.java:7)

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