How to get First N Items from a Vector in Java - Step by Step Examples

◀ Previous Next ▶

How to get First N Items from a Vector in Java ?

Answer

To get the first N items from a Vector in Java using java.util.Vector, you can use subList method.

✐ Examples

1 Get First N Items from Vector

In this example,

First, you create a Vector containing the elements from which you want to retrieve the first N items.
Next, you use the subList method of the Vector class to specify the range for the first N items. The subList method takes two arguments: starting index (inclusive) and ending index (exclusive). So, to select the first N items, you use the range from 0 to N.
Finally, you retrieve the elements within the specified range using the subList method.

Java Program

import java.util.Vector;

public class Main {
    public static void main(String[] args) {
        // Create a Vector containing elements
        Vector<Integer> vector = new Vector<>();
        vector.add(1);
        vector.add(2);
        vector.add(3);
        vector.add(4);
        vector.add(5);
        vector.add(6);
        vector.add(7);
        vector.add(8);
        vector.add(9);
        vector.add(10);

        // Specify the number of items to retrieve (N)
        int N = 5;

        // Retrieve the first N items from the Vector using subList
        Vector<Integer> firstNItems = new Vector<>(vector.subList(0, N));

        // Print the first N items
        System.out.println(firstNItems);
    }
}

Output

[1, 2, 3, 4, 5]

2 Get First Three Items from String Vector

In this example,

Create a Vector containing strings.
Use the subList method of the Vector class to specify the range from 0 to 3 to retrieve the first three items from the string Vector.
Retrieve the first three items within the specified range using the subList method.

Java Program

import java.util.Vector;

public class Main {
    public static void main(String[] args) {
        // Create a Vector containing strings
        Vector<String> stringVector = new Vector<>();
        stringVector.add("apple");
        stringVector.add("banana");
        stringVector.add("orange");
        stringVector.add("grape");
        stringVector.add("kiwi");

        // Retrieve the first three items from the string Vector using subList
        Vector<String> firstThreeItems = new Vector<>(stringVector.subList(0, 3));

        // Print the first three items
        System.out.println(firstThreeItems);
    }
}

Output

[apple, banana, orange]

Summary

In this tutorial, we learned How to get First N Items from a Vector in Java language with well detailed examples.

◀ Previous Next ▶

Java Tutorials

Java How-Tos

How to get First N Items from a Vector in Java - Step by Step Examples

How to get First N Items from a Vector in Java ?

Answer

✐ Examples

1 Get First N Items from Vector

Java Program

Output

2 Get First Three Items from String Vector

Java Program

Output

Summary

More Java Vectors Tutorials