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

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

Answer

To get the last N items from a Vector in Java using java.util.Vector, you can use subList method in combination with the size of the Vector.

✐ Examples

1 Get Last N Items from Vector

In this example,

First, you create a Vector containing the elements from which you want to retrieve the last N items.
Next, you calculate the starting index for the last N items by subtracting N from the size of the Vector.
Finally, you retrieve the elements using the subList method with the calculated starting index to the end of the Vector.

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;

        // Calculate the starting index for the last N items
        int start_index = vector.size() - N;

        // Retrieve the last N items from the Vector using subList
        Vector<Integer> lastNItems = new Vector<>(vector.subList(start_index, vector.size()));

        // Print the last N items
        System.out.println(lastNItems);
    }
}

Output

[6, 7, 8, 9, 10]

2 Get Last Three Items from String Vector

In this example,

Create a Vector containing strings.
Calculate the starting index for the last three items by subtracting three from the size of the Vector.
Retrieve the last three items using the subList method with the calculated starting index to the end of the Vector.

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");

        // Calculate the starting index for the last three items
        int start_index = stringVector.size() - 3;

        // Retrieve the last three items from the string Vector using subList
        Vector<String> lastThreeItems = new Vector<>(stringVector.subList(start_index, stringVector.size()));

        // Print the last three items
        System.out.println(lastThreeItems);
    }
}

Output

[orange, grape, kiwi]

Summary

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

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

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

Answer

✐ Examples

1 Get Last N Items from Vector

Java Program

Output

2 Get Last Three Items from String Vector

Java Program

Output

Summary

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