Vector in Java

Hello friends how are you, today in this blog i will teach you what is vector, how to create vector ,  how to add elements in vector, how vector works and many programs using vector in a very simple way. 

Let's start
  • It is a predefined class and used to store the data.
  • We can store data of any data type(float,int,character,string).
  • It is defined inside the package java.util.
  • It is is similar to a traditional Java array, except that it can grow as necessary to accommodate new elements.
  • Elements of vector can be accessed using index number and it starts from zero.
  • Vectors are Synchronized.
  • Vector implements a dynamic array that means it can grow or shrink as required.
  • It is mostly used when there is no idea about the numbers of element in array.
  • There are three way to create vector.
  • 1. Vector vec = new Vector();
  • It will creates an empty Vector of capacity 10.
  • The default initial capacity of vector is 10.
  • 2. Vector vec = new Vector(5);
  • It will create a Vector of initial capacity of 5.
  • 3. Vector vec = new Vector(5,10);
  • Here 5 is the initial capacity and 10 is the capacity increment.
  • It means upon insertion of 6th element the size would be 15 (5+10).
  • Example

import java.util.Vector;
import java.util.Enumeration;
 class Program 
   public static void main(String args[]) 
      /*creating variable of enumeration*/
      Enumeration courses;
      /*creating object of vector*/
      Vector courseName = new Vector(); 
      /*adding data into vector*/
      /*passing vector data into enumeration*/
      courses = courseName.elements();
      /*Accessing data of enumeration*/
      while (courses.hasMoreElements()) 
       /*printing data of enumeration*/
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