Vector Class in Java

Vector Class in Java

Vector Class in Java

  • Vector class implements List
  • It uses Array data structure to represent the elements.
  • Vector class is synchronized ( thread safe) unlike ArrayList class.

Various Syntax of Vectors :

Type Syntax
Non Generic SignatureVector obj = new Vector();
Generic SignatureVector <DataType> obj = new Vector<DataType>();
With Initial CapacityVector obj = new Vector(int initialCapacity);
With Initial Capacity and Increment :Vector obj = new Vector(int initialcapacity, int capacityIncrement );

Note : By default, the capacity of the vector is 10.


package mypackage;
import java.util.Vector;
public class VectorExample{
public static void main(String[] args) {
Vector<String> vec= new Vector<String>();
vec.add(2, "ever"); //adding “i” in the index 1
System.out.println("Vector elements are:");
for(String s:vec){ //iterating using for loop
System.out.println("The capacity of Vector-->" + vec.capacity());
System.out.println("The Size of Vector before Removal-->" +  vec.size());
System.out.println("vector before Remval:"+ vec);
System.out.println("Vector after removal :" + vec);
System.out.println("The Size of Vector after Removal-->" +  vec.size());



Vector elements are:




The capacity of Vector–>10

The Size of Vector before Removal–>3

vector before Remval:[Happy, For, ever]

Vector after removal :[Happy, ever]

The Size of Vector after Removal–>2


Methods of Vector Class :

Method Name Description
boolean add(E e)Appends the element e to the end of the list.
void add(int i, E element)Inserts the element e at the specified index ‘i’ in the list.
void addElement(E obj)Inserts the element to the vector and increases the vector size by 1. This method is synchronised.
int capacity()Returns the current capacity of the vector.- default is 10
boolean contains(Object o)Returns true if the list contains the element.
E elementAt(int index)Returns the element at given index.
boolean isEmpty()Returns true if the list has no elements
void ensureCapacity(int minCapacity)Ensures that the specified capacity is maintained. Increases the capacity if needed.
void insertElementAt(Object obj, int index)Inserts the object ‘obj’ in the vector at the specified index
E remove(int index)Removes the element at the specified index in the vector.
boolean remove(Object o)Removes the first occurrence of the object from the vector.
void removeElementAt(int index)Removes the element specified in the given index.
int size()Returns the number of elements in the list.
E set(int index, E element)Replaces the element at the specified index in the vector with the given element.
boolean addAll(Collection<? extends E> c)Appends all of the elements in the specified collection to the end of the vector.
boolean removeAll(Collection<?> c)Removes all the elements that are contained in the specified collection from the vector.

Besant Technologies – Chennai & Bangalore Branch Locations

Besant Technologies - Velachery Branch
Plot No. 119, No.8, 11th Main road, Vijaya nagar,
Velachery, Chennai - 600 042
Tamil Nadu, India
Landmark - Reliance Digital Opposite Street
+91-996 252 8294 / 996 252 8293

Besant Technologies - Tambaram Branch
No.2A, 1st Floor, Duraisami Reddy Street,
West Tambaram, Chennai - 600 045
Tamil Nadu, India
Landmark - Near By Passport Seva
+91-970 725 0260

Besant Technologies - OMR Branch
No. 5/318, 2nd Floor, Sri Sowdeswari Nagar,
OMR, Okkiyam Thoraipakkam, Chennai - 600 097
Tamil Nadu, India
Landmark - Behind Okkiyampet Bus Stop,
+91-887 038 4333

Besant Technologies - Porur Branch
No. 180/84, 1st Floor, Karnataka Bank Building
Trunk Road, Porur,
Chennai - 600 116
Tamilnadu, India
Land Mark: Opposite to Gopalakrishna Theatre
+91-755 022 6990

Besant Technologies - Anna Nagar Branch
Plot No:1371, 28th street kambar colony,
I Block, Anna Nagar ,
Chennai - 600 040
Tamil Nadu, India
Landmark - Behind Reliance Fresh
+91-938 404 0493

Besant Technologies - T.Nagar Branch
Old No:146/2- New No: 48,
Habibullah Road,T.Nagar,
Chennai - 600 017
Tamil Nadu, India
Landmark - Opposite to SGS Sabha
+91-984 025 8377

Besant Technologies - Thiruvanmiyur Branch
22/67, 1st Floor,
North mada street, Kamaraj Nagar
Thiruvanmiyur, Chennai 600041
Tamil Nadu, India
Landmark - Above Thiruvanmiyur ICICI Bank
+91-938 404 0493

Besant Technologies - Siruseri Branch
No. 4/76, Ambedkar Street,
OMR Road, Egatoor, Navallur,
Siruseri, Chennai 600130
Tamil Nadu, India
Landmark - Near Navallur Toll Gate, Next to Yamaha Showroom
+91-7338 810 550

Besant Technologies - Maraimalai Nagar Branch
No.37, Ground Floor,
Thiruvalluvar Salai,
Maraimalai Nagar,Chennai 603209
Tamil Nadu, India
Landmark - Near to Maraimalai Nagar Arch
+91-979 123 7373

Besant Technologies - BTM Layout Branch
No 2, Ground floor,
29th Main Road, Kuvempu Nagar,BTM Layout 2nd Coming from Silkboard, take left at AXA company signal,
Stage, Bangalore - 560 076
Karnataka, India
Landmark - Next to OI Play School
+91-762 494 1772 / 74

Besant Technologies - Marathahalli Branch
No. 43/2, 2nd Floor, VMR Arcade,
Varthur Main Road, Silver Springs Layout,
Munnekollal, Marathahalli, Bengaluru - 560037
Karnataka, India
Landmark - Near Kundalahalli Gate Signal
+91-910 812 6341

Besant Technologies - Rajaji Nagar Branch
No. 309/43, JRS Ecstasy, First Floor,
59th Cross, 3rd Block, Bashyam Circle,
Rajaji Nagar, Bangalore - 560 010
Karnataka, India
Landmark - Near Bashyam Circle
+91- 734 916 0004

Besant Technologies - Jaya Nagar Branch
No. 2nd Floor,1575,11th Main Road,
4th T-Block, Pattabhirama Nagar, Jaya Nagar,
karnataka, India
Land Mark: Opposite to Shanthi Nursing Home
+91-733 783 7626

Besant Technologies - Kalyan Nagar Branch
No.513, 4th Cross Rd
2nd Block, HRBR Layout, Kalyan Nagar,
karnataka, India
Land Mark: Opposite to kalayan nagar Axis Bank
+91-938 404 0495

Besant Technologies - Electronic City Branch
No. 7, 3rd Floor, Ganga Enclave,
Neeladri Road, Karuna Nagar, Doddathoguru Village,
Electronics City Phase 1, Electronic City,
Bangalore - 560100, karnataka, India
Land Mark: Adjacent to HDFC Bank and State Bank Of India
+91-782 392 2180

Besant Technologies - Indira Nagar Branch
No.54, 1st Floor,
5th Main kodihalli,
Bengaluru, Karnataka 560008, India
Landmark: Behind Leela Palace Hotel,
+91-910 812 6339

Besant Technologies - HSR Layout Branch
Plot No. 2799 & 2800, 27th Main,
1st Sector, HSR Layout,
Bengaluru, Karnataka 560102, India
+91-733 783 7626

Besant Technologies - Hebbal Branch
No.29, 2nd Floor, SN Complex,
14th Main Road, E-Block Extention, Sahakara Nagar,
Bengaluru, Karnataka -560092, India
+91-938 404 0496