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Java Vector capacity() Method with Example

Vector Class capacity() method: Here, we are going to learn about the capacity() method of Vector Class with its syntax and example.
Submitted by Preeti Jain, on March 15, 2020

Vector Class capacity() method

• capacity() method is available in java.util package.
• capacity() method is used to return the current capacity (i.e. initially, how many object exists) of this Vector object.
• capacity() method is a non-static method, it is accessible with class object only and if we try to access the method with class name then we will get an error.
• capacity() method does not throw an exception at the time of returning capacity.

Syntax:

    public int capacity();

Parameter(s):

• It does not accept any parameter.

Return value:

The return type of the method is int, it gets the current capacity of this Vector.

Example:

// Java program to demonstrate the example 
// of int capacity() method of Vector 

import java.util.*;

public class CapacityOfVector {
    public static void main(String[] args) {
        // Instantiates a Vector object  with
        // initial capacity of "10"
        Vector < String > v = new Vector < String > (10);

        // By using add() method is to add the
        // elements in this v
        v.add("C");
        v.add("C++");
        v.add("JAVA");

        // By using size() methos is to return the 
        // size i.e. the number of element exists
        // Display Vector Size
        System.out.println("v.size(): " + v.size());

        // By using capacity() method is to return the 
        // Vector capacity

        // Display Vector Capacity
        System.out.println("v.capacity(): " + v.capacity());
    }
}

Output

v.size(): 3
v.capacity(): 10