Iterating over a HashSet using Iterator

The following example shows different ways of iterating over a HashSet using Iterator:

• Iterate over a HashSet using iterator().
• Iterate over a HashSet using iterator() and Java 8 forEachRemaining() method.

Iterating over a HashSet

package com.javaguides.collections.hashsetexamples;

import java.util.HashSet;
import java.util.Iterator;
import java.util.Set;

public class IterateOverHashSetExample {
    public static void main(String[] args) {
        Set < String > programmingLanguages = new HashSet < > ();
        programmingLanguages.add("C");
        programmingLanguages.add("C++");
        programmingLanguages.add("Java");
        programmingLanguages.add("Python");
        programmingLanguages.add("PHP");
        programmingLanguages.add("Ruby");

        System.out.println("=== Iterate over a HashSet using iterator() ===");
        Iterator < String > programmingLanguageIterator = programmingLanguages.iterator();
        while (programmingLanguageIterator.hasNext()) {
            String programmingLanguage = programmingLanguageIterator.next();
            System.out.println(programmingLanguage);
        }

        System.out.println("=== Iterate over a HashSet using iterator() and Java 8 forEachRemaining() method ===");
        programmingLanguageIterator = programmingLanguages.iterator();
        programmingLanguageIterator.forEachRemaining(programmingLanguage - > {
            System.out.println(programmingLanguage);
        });
    }
}

Output

=== Iterate over a HashSet using iterator() ===
Java
C++
C
PHP
Ruby
Python
=== Iterate over a HashSet using iterator() and Java 8 forEachRemaining() method ===
Java
C++
C
PHP
Ruby
Python

Related Collections Examples

• Java LinkedHashMap Example
  
• Java HashSet Example
  
• Java LinkedList Example
  
• Java ArrayList Example
• Java Comparator Interface Example
• Java Comparable Interface Example
• Java IdentityHashMap Example
• Java WeakHashMap Example
• Java EnumMap Example
• Java CopyOnWriteArraySet Example
• Java EnumSet Class Example
• Guide to Java 8 forEach Method
• Different Ways to Iterate over a List in Java [Snippet]
• Different Ways to Iterate over a Set in Java [Snippet]
• Different Ways to Iterate over a Map in Java [Snippet]
• Iterate over TreeSet in Java Example
• Iterate over LinkedHashSet in Java Example
• Remove First and Last Elements of LinkedList in Java
• Iterate over LinkedList using an Iterator in Java
• Search an Element in an ArrayList in Java
• Iterate over ArrayList using Iterator in Java
• Remove Element from HashSet in Java
• Iterating over a HashSet using Iterator
• How To Remove Duplicate Elements From ArrayList In Java?
  
• Different Ways to Iterate over List, Set, and Map in Java

Reference

• https://www.javaguides.net/2018/06/guide-to-hashset-class.html

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