# Java program to change the size of a Vector collection

Given Vector collection, we have to change the size of it.
Submitted by Nidhi, on May 25, 2022

Problem Solution:

In this program, we will create a Vector collection with integer elements. Then we will change the size of the vector collection using the setSize() method.

Program/Source Code:

The source code to set the size of a Vector collection is given below. The given program is compiled and executed successfully.

```// Java program to change the size of a
// Vector collection

import java.util.*;

public class Main {
public static void main(String[] args) {
Vector < Integer > vec = new Vector < Integer > ();

System.out.println("Vector elements: " + vec);

vec.setSize(7);

System.out.println("Vector elements: " + vec);
}
}
```

Output:

```Vector elements: [10, 20, 30, 20, 12]
Vector elements: [10, 20, 30, 20, 12, null, null]
```

Explanation:

In the above program, we imported the "java.util.*" package to use the Vector class. Here, we created a public class Main.

The Main class contains a main() method. The main() method is the entry point for the program. And, created a Vector collection vec with integer elements. Then we used the setSize() method to change the size of the Vector collection. After that, we printed the updated Vector collection.

Preparation

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