how to iterate hashset in java code example

Example 1: how to iterate hashset in java 8

Set<String> set = new HashSet<String>();
for (String s : set) {
    System.out.println(s);
}

//Java 8:
set.forEach(System.out::println);

Example 2: HashSet iterator() method in java

import java.util.HashSet;
import java.util.Iterator;
public class HashSetIteratorMethodExample
{
   public static void main(String[] args)
   {
      HashSet<String> hs = new HashSet<String>();
      hs.add("Welcome");
      hs.add("hello");
      hs.add("world");
      hs.add("core");
      hs.add("java");
      System.out.println("HashSet values are: " + hs);
      // create an Iterator
      Iterator<String> value = hs.iterator();
      System.out.println("iterator values are: ");
      while(value.hasNext())
      {
         System.out.println(value.next());
      }
   }
}

Example 3: set iteration java

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

class IterateHashSet{ 
  public static void main(String[] args) {
     HashSet<String> hset = new HashSet<String>();
     hset.add("Chaitanya");
     hset.add("Rahul");
 
     Iterator<String> it = hset.iterator();
     while(it.hasNext()){
        System.out.println(it.next());
     }
  }
}

Example 4: hashset in java

Let’s see java hashset example.

import java.util.HashSet;
public class HashSetExample
{
   public static void main(String[] args)
   {
      HashSet<String> hs = new HashSet<>();
      hs.add("Banana");
      hs.add("Orange");
      hs.add("Apple");
      hs.add("Pineapple");
      hs.add("Mango");
      System.out.println(hs);
   }
}

Example 5: what is hashset in java

- HashSet can have null, order is not guaranteed