Example of using ArrayList, LinkedList, and Vector in Java

Category : Java | Sub Category : Java.util Package | By Prasad Bonam Last updated: 2023-07-12 10:59:16 Viewed : 335

Example of using ArrayList, LinkedList, and Vector in Java:

Here is an example of using ArrayList, LinkedList, and Vector in Java:

ArrayList Example:

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import java.util.ArrayList;

public class ArrayListExample {
    public static void main(String[] args) {
        // Create an ArrayList of integers
        ArrayList<Integer> numbers = new ArrayList<>();

        // Add elements to the ArrayList
        numbers.add(10);
        numbers.add(20);
        numbers.add(30);

        // Access elements by index
        System.out.println("Element at index 0: " + numbers.get(0));

        // Update elements
        numbers.set(1, 25);
        System.out.println("Updated element at index 1: " + numbers.get(1));

        // Remove elements
        numbers.remove(2);
        System.out.println("Size after removing an element: " + numbers.size());

        // Iterate over the ArrayList
        System.out.println("Elements in the ArrayList:");
        for (int number : numbers) {
            System.out.println(number);
        }
    }
}

LinkedList Example:

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import java.util.LinkedList;

public class LinkedListExample {
    public static void main(String[] args) {
        // Create a LinkedList of strings
        LinkedList<String> names = new LinkedList<>();

        // Add elements to the LinkedList
        names.add("Alice");
        names.add("Bob");
        names.add("Charlie");

        // Access elements by index
        System.out.println("Element at index 0: " + names.get(0));

        // Update elements
        names.set(1, "Brian");
        System.out.println("Updated element at index 1: " + names.get(1));

        // Remove elements
        names.remove(2);
        System.out.println("Size after removing an element: " + names.size());

        // Iterate over the LinkedList
        System.out.println("Elements in the LinkedList:");
        for (String name : names) {
            System.out.println(name);
        }
    }
}

Vector Example:

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import java.util.Vector;

public class VectorExample {
    public static void main(String[] args) {
        // Create a Vector of doubles
        Vector<Double> prices = new Vector<>();

        // Add elements to the Vector
        prices.add(9.99);
        prices.add(19.99);
        prices.add(29.99);

        // Access elements by index
        System.out.println("Element at index 0: " + prices.get(0));

        // Update elements
        prices.set(1, 24.99);
        System.out.println("Updated element at index 1: " + prices.get(1));

        // Remove elements
        prices.remove(2);
        System.out.println("Size after removing an element: " + prices.size());

        // Iterate over the Vector
        System.out.println("Elements in the Vector:");
        for (double price : prices) {
            System.out.println(price);
        }
    }
}

In these examples, we create instances of ArrayList, LinkedList, and Vector, and perform operations such as adding elements, accessing elements by index, updating elements, removing elements, and iterating over the collections. Each implementation has its own methods and characteristics, but the basic usage and functionality are similar across all three.