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

1 vote170 views1 answer
How to put icons inside of an edittext android
Java
1 vote167 views1 answer
Java robot left click
Java
12 votes118 views2 answers
Sleep() java
Java
0 vote140 views1 answer
Convert python to java translator online
Java
0 vote128 views1 answer
Papermc api maven
Java
0 vote124 views1 answer
Can the method local inner class object access method local variables
Java
0 vote127 views1 answer
Java setting logging with rotation logback
Java
1 vote126 views1 answer
Check the string has spaces in it in java
Java
0 vote127 views1 answer
Jacoco code coverage
Java
3 votes139 views1 answer
Java get relative path
Java