Java Collections emptyIterator() Method with Examples

by Online Tutorials Library July 22, 2022

Java Collections emptyIterator() Method

The emptyIterator() method of Java Collections class is used to get an Iterator that has no elements.

Syntax

Following is the declaration of emptyIterator() method:

Parameter

This method does not accept any parameter.

Returns

The emptyIterator() method returns an empty Iterator.

Exceptions

Compatibility Version

Java 1.7 and above

Example 1

  import java.util.*;  public class CollectionsEmptyIteratorExample1 {  public static void main(String[] args) {  Iterator Itr = Collections.emptyIterator();              System.out.println(“Output: “+Itr.hasNext());                 }  }  

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Output:

Output: false

Example 2

  import java.util.*;  public class CollectionsEmptyIteratorExample2 {  public static void main(String[] args) {     List ls = new ArrayList();           ls.add(“one”);           ls.add(“two”);           ls.add(“three”);           ls.add(“four”);           Iterator Itr = Collections.emptyIterator();           while(Itr.hasNext()){                System.out.println(Itr.next());           }           System.out.println(“Iterator list is empty.”);     }    }  

Test it Now

Output:

Iterator list is empty.

Example 3

  import java.util.*;  public class CollectionsEmptyIteratorExample3 {  public static void main(String[] args) {  List ls = new ArrayList();              ls.add(1);              ls.add(2);              ls.add(3);              ls.add(4);              Iterator Itr = Collections.emptyIterator();              while(Itr.hasNext()){                   System.out.println(Itr.next());              }              System.out.println(“It is empty Iterator list.”);        }    }  

Test it Now

Output:

It is empty Iterator list.

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Java Collections emptyIterator() Method with Examples

Java Collections emptyIterator() Method

Syntax

Parameter

Returns

Exceptions

Compatibility Version

Example 1

Example 2

Example 3

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