Vector capacity() Method in Java

The Java.util.Vector.capacity() method in Java is used to get the capacity of the Vector or the length of the array present in the Vector.

Syntax:

Vector.capacity()

Parameters: The method does not take any parameter.

Return Value: The method returns the capacity or the internal data array’s length present in the Vector, which is an integer value.

Below programs illustrate the Java.util.Vector.capacity() method:

Program 1: Vector with string elements.

// Java code to illustrate capacity()
import java.util.*;

public class VectorDemo {
    public static void main(String args[])
    {
        // Creating an empty Vector
        Vector<String> vec_tor = new Vector<String>();

        // Use add() method to add elements into the Vector
        vec_tor.add("Welcome");
        vec_tor.add("To");
        vec_tor.add("Geeks");
        vec_tor.add("4");
        vec_tor.add("Geeks");

        // Displaying the Vector
        System.out.println("Vector: " + vec_tor);

        // Displaying the capacity of Vector
        System.out.println("The capacity is: " + vec_tor.capacity());
    }
}

Output:

Vector: [Welcome, To, Geeks, 4, Geeks]
The capacity is: 10

Program 2: Vector with Integer elements.

// Java code to illustrate capacity()
import java.util.*;

public class VectorDemo {
    public static void main(String args[])
    {
        // Creating an empty Vector
        Vector<Integer> vec_tor = new Vector<Integer>();

        // Use add() method to add elements into the Vector
        vec_tor.add(10);
        vec_tor.add(15);
        vec_tor.add(30);
        vec_tor.add(20);
        vec_tor.add(5);

        // Displaying the Vector
        System.out.println("Vector: " + vec_tor);

        // Displaying the capacity of Vector
        System.out.println("The capacity is: " + vec_tor.capacity());
    }
}

Output:

Vector: [10, 15, 30, 20, 5]
The capacity is: 10