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 vote241 views1 answer
Dowload htpasswd file java
Java
0 vote246 views1 answer
For each loop java string array
Java
3 votes234 views2 answers
Android round double to 2 decimal
Java
6 votes262 views6 answers
Binary Search Algorithm
Java
0 vote189 views0 answer
Java
0 vote199 views1 answer
How to get column and row numbers in java
Java
0 vote249 views1 answer
At com.android.okhttp.internal.huc.HttpURLConnectionImpl.getInputStream(HttpURLConnectionImpl.java:251)
Java
4 votes246 views3 answers
Online currency rate api
Java
1 vote239 views1 answer
Java look and feel system
Java
0 vote248 views1 answer
Selenium java wait for page load
Java