Example: Remove Duplicates using LinkedHashSet in Java

// Remove Duplicates using LinkedHashSet
import java.util.LinkedHashSet;
import java.util.Arrays;
import java.util.Set;

public class Main {
    public static void main(String[] args) {
        // Step 1: Define the array with duplicate elements
        Integer[] originalArray = {1, 2, 3, 2, 1, 4, 5, 4, 6};
        System.out.println("Original Array: " + Arrays.toString(originalArray));

        // Step 2: Create a LinkedHashSet and add all elements from the array
        // LinkedHashSet automatically handles uniqueness and maintains insertion order
        Set<Integer> uniqueElements = new LinkedHashSet<>(Arrays.asList(originalArray));

        // Step 3: Convert the LinkedHashSet back to an array
        Integer[] arrayWithoutDuplicates = uniqueElements.toArray(new Integer[0]);

        // Step 4: Print the array after removing duplicates
        System.out.println("Array without Duplicates (LinkedHashSet): " + Arrays.toString(arrayWithoutDuplicates));
    }
}