What is 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

What is hashset in java

- HashSet can have null, order is not guaranteed

-2

Similar codes

0 vote313 views1 answer
Java code file
Java
4 votes338 views1 answer
Shift elements in array java
Java
0 vote342 views1 answer
Set precision in java
Java
0 vote319 views1 answer
How to check if a string is in alphabetical order in java
Java
0 vote371 views1 answer
Sort a list according to location
Java
1 vote322 views1 answer
How to have multiple extensions in one filter java
Java
0 vote349 views1 answer
Choose image java
Java
2 votes334 views2 answers
Unresolved reference activity_main
Java
7 votes329 views3 answers
Convert Integer arraylist to array java
Java
0 vote315 views1 answer
Java ordenar numeros ascendente
Java