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

0 vote238 views1 answer
Create exception java
Java
0 vote292 views1 answer
Java get if contains else 0
Java
0 vote284 views1 answer
>> vs >>> operators in java
Java
1 vote284 views1 answer
Character comparison java
Java
11 votes293 views4 answers
How to read a text file in java
Java
0 vote313 views1 answer
Check character is alphanumeric java
Java
3 votes289 views5 answers
Declare variable java
Java
4 votes295 views2 answers
Api for currency conversion free
Java
0 vote288 views3 answers
D/NetworkSecurityConfig: No Network Security Config specified, using platform default
Java
0 vote329 views1 answer
Get value from Spring application.properties
Java