Java HashSet iterator() Method with Examples

by Online Tutorials Library July 22, 2022

Java HashSet iterator() Method

The iterator() method of Java HashSet class is used to return an iterator of the same elements as the HashSet. It return elements in random order from what present in the HashSet.

Syntax

Following is the declaration of iterator() method:

Parameter

This method does not accept any parameter.

Returns

The iterator() method returns an Iterator over the elements in this set.

Exceptions

Compatibility Version

Java 1.2 and above

Example 1

  import java.util.*;  public class HashSetIteratorExample1 {  public static void main(String[] args) {  HashSet set=new HashSet();    set.add(“Ravi”);    set.add(“Vijay”);    set.add(“Mohan”);    set.add(“Ajay”);    //Traversing elements    Iterator itr=set.iterator();    while(itr.hasNext()){       System.out.println(itr.next());    }    }  }  

Test it Now

Output:

Vijay  Mohan  Ravi  Ajay

Example 2

  import java.util.*;  public class HashSetIteratorExample2 {  public static void main(String[] args) {  HashSet  hashSetObject = new HashSet <>();  hashSetObject.add(45);  hashSetObject.add(67);  hashSetObject.add(98);  hashSetObject.add(24);  //Traversing elements    Iterator itr = hashSetObject.iterator();    while(itr.hasNext()){       System.out.println(“Output: “+itr.next());    }    }  }  

Test it Now

Output:

Output: 98  Output: 67  Output: 24  Output: 45

Example 3

  import java.util.*;  public class HashSetIteratorExample3 {  public static void main(String[] args) throws InterruptedException {  //Get the HashMap object  HashSet studentSet = init();  //Display the contents of set  Iterator it = studentSet.iterator();  while (it.hasNext()) {  System.out.println(it.next());  }  }  private static HashSet init() {  //Create HashSet object  HashSet studentSet = new HashSet<>();  //Add contents to the set  studentSet.add(“Rahul”);  studentSet.add(“Mohan”);  studentSet.add(“Karan”);  return studentSet;  }  }  

Test it Now

Output:

Rahul  Mohan  Karan

Next TopicHashSet remove() Method

add(E e)clear()clone()contains(Object o)hashset isempty()iterator java remove(Object o)size()spliterator()

Java HashSet iterator() Method with Examples

Java HashSet iterator() Method

Syntax

Parameter

Returns

Exceptions

Compatibility Version

Example 1

Example 2

Example 3

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