Java Vector setSize( ) Method with Example

In the previous article, we have discussed about Java Vector ensureCapacity( ) Method with Example

In this article, we are going to see the use of Java Vector setSize() method along with examples.

Java Vector setSize( ) Method with Example

This java.util.Vector.setSize() method  sets the size of the vector and any empty element index is assigned null value. Its return type is void.

Syntax:

vectorName.setSize(int new_size );

Where,

  • vectorName refers to the name of the vector.
  • new_size refers to the parameter passed to method which sets the new size of the vector.

Approach:

  • Create a vector of string data type and add some elements to it.
  • Print the elements.
  • Now, set the vector size to 9 by passing it into the setSize( ) method.
  • Print the vector elements and its size after setting the new size.

Program:

import java.util.*;
public class Main
{
   public static void main(String[] args)
   {
       // Create a Vector of string datatype
       Vector<String> vec = new Vector<String>();
       // Adding some elements to the vector
       vec.add("One");
       vec.add("Two");
       vec.add("Three");
       vec.add("Four");
       vec.add("Five");
       vec.add("Six");
       vec.add("Seven");
       // Prints the vector elements
       System.out.println("The vector elements are "+vec);
       // Sets the size of the vector
       vec.setSize(9);
       // Prints the vector elements after set the size of the vector
       System.out.println("The vector elements after set the size are "+vec);
       // Prints the size of the vector
       System.out.println("The size of the vector after setting size to 9 is "+vec.size());
   }
}
Output:

The vector elements are [One, Two, Three, Four, Five, Six, Seven]
The vector elements after set the size are [One, Two, Three, Four, Five, Six, Seven, null, null]
The size of the vector after setting size to 9 is 9

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