Write a Java program to count the items of a Vector collection
The code you provided is written in Java and demonstrates how to use a Vector to store a collection of integers and count the number of elements in the Vector. Here's an explanation of the code:
- import java.util.*;: This line imports the java.util package, which contains the Vector class and other utility classes.
- public class Count_Items: This line declares a public class named Count_Items.
- public static void main(String[] args): This is the main method where the execution of the program starts. It takes an array of strings as command line arguments.
- Vector<Integer> vec_list = new Vector<Integer>();: This line declares and initializes a Vector object named vec_list that can store Integer values. Note that using generics (<Integer>) is not necessary in newer versions of Java.
- for (int i = 1; i <= 10; i++): This line starts a for loop with the loop variable i initialized to 1, and it continues as long as i is less than or equal to 10. After each iteration, i is incremented by 1.
- vec_list.add(i);: Inside the for loop, this line adds the value of i to the vector vec_list.
- System.out.println("Size of vector collection :" + vec_list.size());: This line prints the size of the vector collection by concatenating the string "Size of vector collection :" with the size of the vector using the size() method. The size() method returns the number of elements in the vector.
Source Code
import java.util.*;
public class Count_Items
{
public static void main(String[] args)
{
Vector <Integer> vec_list = new Vector <Integer>();
for (int i = 1; i <= 10; i++)
{
vec_list.add(i);
}
System.out.println("Size of vector collection :" + vec_list.size());
}
}
Output
Size of vector collection :10