Java Collections emptySortedMap() Method

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

Syntax

Following is the declaration of emptySortedMap() method:

Parameter

This method does not accept any parameter.

Returns

The emptySortedMap() method returns an empty immutable Sorted Map.

Exceptions

Compatibility Version

Java 1.8 and above

Example 1

import java.util.*;
public class CollectionsEmptySortedMapExample1 {
	public static void main(String[] args) {		
	     SortedMap<String,String> EmpSortedMap = Collections.emptySortedMap();
	     System.out.println("Created Empty Sorted Map: "+EmpSortedMap);
	     }	  
}

Test it Now

Output:

Created Empty Sorted Map: {}

Example 2

import java.util.*;
public class CollectionsEmptySortedMapExample2 {
	public static void main(String[] args) {		
	     SortedMap<String,String> EmpSortedMap = Collections.emptySortedMap();
	     System.out.println("Created Empty Sorted Map: "+EmpSortedMap);
	     // try to add elements
	     EmpSortedMap.put("1","from JavaTpoint.com");
	     }	  
}

Test it Now

Output:

Created Empty Sorted Map: {}
Exception in thread "main" java.lang.UnsupportedOperationException
	at java.base/java.util.Collections$UnmodifiableMap.put(Collections.java:1453)
	at myPackage.CollectionsEmptySortedMapExample2.main(CollectionsEmptySortedMapExample2.java:9)

Example 3

import java.util.*;
public class CollectionsEmptySortedMapExample3 {
	public static void main(String[] args) {		
		//Create an empty Map  
	      SortedMap<Integer, Integer> empSortedMap = Collections.emptySortedMap();
	      empSortedMap.put(1, 23424);
	      empSortedMap.put(2, 65776);    
	      System.out.println("Created empty immutable Sorted Map: "+empSortedMap);	     
	      }	  
}

Test it Now

Output:

Exception in thread "main" java.lang.UnsupportedOperationException
	at java.base/java.util.Collections$UnmodifiableMap.put(Collections.java:1453)
	at myPackage.CollectionsEmptySortedMapExample3.main(CollectionsEmptySortedMapExample3.java:8)

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