Vector in Java - The Code Data

Vectors are an essential data structure in Java that provides dynamic, resizable arrays, making them a versatile tool for managing collections of data.

Contents hide

1 What is a Vector in Java ?

2 Properties of Vector

3 Vector Consturctor

3.1 Vector()

3.2 Vector(int initialCapacity)

3.3 Vector(int initialCapacity, int incrementCapacity)

3.4 Vector(Collection c)

4 Vector Example in Java

5 Similar Java Tutorials

What is a Vector in Java ?

A Vector in Java is a part of the Collection Framework. Vector provides a dynamic array-like structure. Unlike traditional arrays vectors can dynamically grow and shrink in size as elements are added or removed, making vectors suitable for various data management tasks.

Properties of Vector

Insertion Order is preserved in Vectors
Duplicates are allowed in vectors
null insertion is possible in vectors
Vector implements RandomAccess, Cloneable, and java.io.Serializable interface.
Vector objects are thread-safe because all methods of vectors are synchronized.

Vector Consturctor

Vector()

        Vector v = new Vector();

The constructor creates an empty Vector objet with default initial capacity 10.

Once the vector capacity full then a new Vector object will be created with new capacity. new capacity is calculate as given below

new capacity = current capacity * 2

Vector(int initialCapacity)

        Vector v = new Vector( int initialCapacity);

This constructor creates and empty Vector object with the specified initial capacity.

Vector(int initialCapacity, int incrementCapacity)

        Vector v = new  Vector(int initialCapacity,
 int capacityIncrement );

This constructor creates an empty Vector object with the specified initial capacity and capacity increment.

Vector(Collection c)

        Vector v = new Vector( Collection c);

This constructor creates an equivalent Vector object for given collection c. Mostly used for inter conversion between Collection objects.

Vector Example in Java

package vector;

import java.util.Vector;

public class VectorDemo {
    public static void main(String[] args) {
        Vector vector = new Vector();
        System.out.println(vector.capacity()); //initial capacity
        for(int i=0;i<10;i++){
            vector.add(i);
        }
        System.out.println(vector.capacity());
        vector.add("thecodedata");
        System.out.println(vector.capacity()); //updated capacity
        System.out.println(vector);

    }

}