? Java Vector

? Quick Overview

Vector is a legacy class in Java that implements a dynamic array. It is part of the java.util package and is synchronized by default, making it thread-safe.

? Key Concepts

• Vector stores elements in insertion order
• It automatically grows when capacity is exceeded
• All methods are synchronized (thread-safe)
• It allows duplicate and null values

? Syntax / Theory

A Vector can store objects and uses indexing like arrays. It is similar to ArrayList but slower due to synchronization.

// Creating and using a Vector in Java
import java.util.Vector;

public class VectorDemo {
public static void main(String[] args) {
Vector names = new Vector<>();
names.add("Java");
names.add("Python");
names.add("C++");
System.out.println(names);
}
}

?️ Live Output / Explanation

? Interactive Vector Demo

Visualizing how capacity doubles when the Vector gets full.