Hashset java

// Java program to demonstrate working of HashSet
import java.util.*;
  
class HashSetDemo {
  
    // Main Method
    public static void main(String[] args)
    {
        HashSet<String> h = new HashSet<String>();
  
        // Adding elements into HashSet usind add()
        h.add("India");
        h.add("Australia");
        h.add("South Africa");
        h.add("India"); // adding duplicate elements
  
        // Displaying the HashSet
        System.out.println(h);
        System.out.println("List contains India or not:"
                           + h.contains("India"));
  
        // Removing items from HashSet using remove()
        h.remove("Australia");
        System.out.println("List after removing Australia:"
                           + h);
  
        // Iterating over hash set items
        System.out.println("Iterating over list:");
        Iterator<String> i = h.iterator();
        while (i.hasNext())
            System.out.println(i.next());
    }
}

Source: geeksforgeeks.org

Hashset usage

- HashSet can have null, order is not guaranteed
- HashSet is commonly used if you want to access elements randomly or store a list of items which cannot contain duplicate values

What is hashset in java

- HashSet can have null, order is not guaranteed

-2

Similar codes

0 vote211 views1 answer
Java android development find element by id
Java
-1 vote179 views1 answer
192.168.223.12:8080
Java
0 vote190 views1 answer
Jax-RS PUT annotation
Java
0 vote171 views2 answers
How to convert int array to Integer List in java
Java
0 vote194 views1 answer
Parse object to int java
Java
1 vote260 views1 answer
Spring mvc project example
Java Spring
1 vote167 views2 answers
Java separate the numbers from string
Java
1 vote183 views1 answer
Jaxb exclude field
Java
4 votes167 views2 answers
Dfhgodjfgiojdfiojgjkdhjbsdv JKNJZXcnmvmcvbpdfh
Java
0 vote165 views1 answer
How to run the war file in Apache Tomcat/8.5.59 THROUGH SPRING
Java