Java Collections emptySortedSet() Method

The emptySortedSet() method of Java Collections class is used to get the sorted Set that has no elements. These empty Set are immutable in nature.

Syntax

Following is the declaration of emptySortedSet() method:

Parameter

This method does not accept any parameter.

Returns

The emptySortedSet() method returns an empty sorted Set.

Exceptions

Compatibility Version

Java 1.8 and above

Example 1

import java.util.*;
public class CollectionsEmptySortedSetExample1 {
	public static void main(String[] args) {		
	     //Create an empty Sorted Set   
	     SortedSet<String> EmptySet = Collections.<String>emptySortedSet();
	     System.out.println("Empty Sorted Set: "+EmptySet);
	     }	  
}

Test it Now

Output:

Empty Sorted Set: []

Example 2

import java.util.*;
public class CollectionsEmptySortedSetExample2 {
	public static void main(String[] args) {		
		//Create an empty Sorted Set
	      SortedSet<String> EmpSortSet = Collections.emptySortedSet();
	      System.out.println("Created empty immutable Sorted Set: "+EmpSortSet);
	      //Try to add elements
	      EmpSortSet.add("A");
	      EmpSortSet.add("B");
	      }	  
}

Test it Now

Output:

Created empty immutable Sorted Set: []Exception in thread "main" 
java.lang.UnsupportedOperationException
	at java.base/java.util.Collections$UnmodifiableCollection.add(Collections.java:1056)
	at myPackage.CollectionsEmptySortedSetExample2.main(CollectionsEmptySortedSetExample2.java:9)

Example 3

import java.util.*;
public class CollectionsEmptySortedSetExample3 {
	public static void main(String[] args) {		
		//Create an empty Sorted Set    
	      SortedSet<Integer> empSortSet = Collections.emptySortedSet();
	      empSortSet.add(1);
	      empSortSet.add(2);    
	      System.out.println("Created empty immutable Sorted Set: "+empSortSet);     
	      }	  
}

Test it Now

Output:

Exception in thread "main" java.lang.UnsupportedOperationException
	at java.base/java.util.Collections$UnmodifiableCollection.add(Collections.java:1056)
	at myPackage.CollectionsEmptySortedSetExample3.main(CollectionsEmptySortedSetExample3.java:8)

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