Hashset in java

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 in java

- HashSet can have null, order is not guaranteed

-2

Similar codes

1 vote207 views1 answer
Java localdate zoneid example
Java
1 vote206 views1 answer
Spring gradle don't build boot jar
Java
4 votes203 views3 answers
Android dialog modal
Java
0 vote207 views1 answer
Thymeleaf spring boot dependency for mail
Java
0 vote242 views1 answer
Spigot scoreboard objective
Java
0 vote205 views1 answer
Méthode retourne nom classe java
Java
0 vote228 views1 answer
Spring boot get bean
Java
1 vote263 views1 answer
How to calculate the amount of months between two dates java
Java
2 votes199 views1 answer
Java string replace character at position
Java
2 votes193 views1 answer
Android back navigation
Java