Java Collections emptyNavigableSet() Method with Examples

by Online Tutorials Library July 22, 2022

Java Collections emptyNavigableSet() Method

The emptyNavigableSet() method of Java Collections class is used to get the empty navigable Set which is immutable in nature.

Syntax

Following is the declaration of emptyNavigableSet() method:

Parameter

This method does not accept any parameter.

Returns

The emptyNavigableSet() method returns an immutable navigable Set which has no element.

Exceptions

Compatibility Version

Java 1.8 and above

Example 1

  import java.util.*;  public class CollectionsEmptyNavigableSetExample1 {  public static void main(String[] args) {       //Create an empty Set          NavigableSet EmpNavSet = Collections.emptyNavigableSet();       System.out.println(“Empty Navigable Set: “+EmpNavSet);       }    }  

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Output:

Empty Navigable Set: []

Example 2

  import java.util.*;  public class CollectionsEmptyNavigableSetExample2 {  public static void main(String[] args) {  //Create an empty Navigable Set        NavigableSet EmpNavSet = Collections.emptyNavigableSet();        System.out.println(“Created empty immutable Navigable Set: “+EmpNavSet);        //Try to add elements        EmpNavSet.add(“A”);        EmpNavSet.add(“B”);        }    }  

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Output:

Created empty immutable Navigable Set: []  Exception in thread "main" java.lang.UnsupportedOperationException  at java.base/java.util.Collections$UnmodifiableCollection.add(Collections.java:1056)  at myPackage.CollectionsEmptyNavigableSetExample2.main(CollectionsEmptyNavigableSetExample2.java:9)

Example 3

  import java.util.*;  public class CollectionsEmptyNavigableSetExample3 {  public static void main(String[] args) {  //Create an empty Navigable Set           Set empNavSet = Collections.emptyNavigableSet();        empNavSet.add(1);        empNavSet.add(2);            System.out.println(“Created empty immutable Navigable Set: “+empNavSet);             }    }  

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Output:

Exception in thread "main" java.lang.UnsupportedOperationException  at java.base/java.util.Collections$UnmodifiableCollection.add(Collections.java:1056)  at myPackage.CollectionsEmptyNavigableSetExample3.main(CollectionsEmptyNavigableSetExample3.java:7)

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Java Collections emptyNavigableSet() Method with Examples

Java Collections emptyNavigableSet() Method

Syntax

Parameter

Returns

Exceptions

Compatibility Version

Example 1

Example 2

Example 3

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