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 vote139 views3 answers
Diiferent ways to run spring boot
Java
1 vote132 views4 answers
How to create progress dialog programmatically in android
Java
0 vote150 views1 answer
Association in java
Java
6 votes142 views3 answers
Print map in java
Java
0 vote136 views1 answer
Java suppress warnings rawtypes
Java
1 vote158 views2 answers
Spigot heal player
Java
0 vote150 views1 answer
Jbutton border size java
Java
0 vote131 views1 answer
Difference between maven plugin and dependency
Java
0 vote181 views1 answer
Input string a list in java
Java
1 vote139 views1 answer
How to add minutes in date in java
Java