? LinkedHashSet in Advanced Java

? Quick Overview

LinkedHashSet is a part of the Java Collection Framework. It stores unique elements like HashSet but also maintains the insertion order of elements.

? Key Concepts

• No duplicate elements allowed
• Maintains insertion order
• Allows one null value
• Uses Hash Table + Linked List internally
• Non-synchronized collection

? Syntax & Theory

LinkedHashSet extends HashSet and implements the Set interface. It is useful when predictable iteration order is required.

// Import LinkedHashSet class
import java.util.LinkedHashSet;

public class Main {
public static void main(String[] args) {

// Create LinkedHashSet object
LinkedHashSet fruits = new LinkedHashSet<>();

// Add elements to the set
fruits.add("Apple");
fruits.add("Banana");
fruits.add("Mango");
fruits.add("Apple");

// Print elements
System.out.println(fruits);
}
}