See the Udemy course: https://www.udemy.com/course/curso-certificacion-profesional-desarrollador-java-se-11
Let's talk about ArrayList, Vector, and LinkedList in Java.
ArrayList is a part of the Java Collections Framework and is implemented in the java.util package.
It's a resizable array that can dynamically grow or shrink in size.
It provides fast random access to elements, making it efficient for retrieving elements by index.
import java.util.ArrayList;
public class ArrayListExample {
public static void main(String[] args) {
// Creating an ArrayList
ArrayList<String> arrayList = new ArrayList<>();
// Adding elements
arrayList.add("Apple");
arrayList.add("Banana");
arrayList.add("Orange");
// Accessing elements
System.out.println(arrayList.get(1)); // Output: Banana
}
}Vector is also a part of the Java Collections Framework and is similar to ArrayList.
It's synchronized, which means it's thread-safe. This can be an advantage in multithreaded environments, but it might introduce some performance overhead.
import java.util.Vector;
public class VectorExample {
public static void main(String[] args) {
// Creating a Vector
Vector<String> vector = new Vector<>();
// Adding elements
vector.add("Red");
vector.add("Green");
vector.add("Blue");
// Accessing elements
System.out.println(vector.get(2)); // Output: Blue
}
}LinkedList is another implementation of the List interface, and it's based on a doubly-linked list data structure.
It provides efficient insertion and deletion of elements, especially in the middle of the list, but it may not be as efficient for random access.
import java.util.LinkedList;
public class LinkedListExample {
public static void main(String[] args) {
// Creating a LinkedList
LinkedList<String> linkedList = new LinkedList<>();
// Adding elements
linkedList.add("Cat");
linkedList.add("Dog");
linkedList.add("Fish");
// Accessing elements
System.out.println(linkedList.get(1)); // Output: Dog
}
}Each of these data structures has its use cases, and the choice between them depends on the specific requirements of your program.
If you need fast random access, ArrayList is a good choice. If you need synchronization, Vector might be suitable.
If you require efficient insertion and deletion, especially in the middle of the list, LinkedList is worth considering.
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