How to Insert an Item at Specific Index in a Vector in Java - Step by Step Examples

How to Insert an Item at Specific Index in a Vector in Java ?

Answer

To insert an item at a specific index in a vector in Java using java.util.Vector, you can use the insertElementAt() method. This method allows you to insert an element at the specified index in the vector.

✐ Examples

1 Insert an Integer at Specific Index in a Vector

In this example,

Create a Vector of Integers using the Vector class.
Declare an integer variable to insert into the vector.
Use the insertElementAt() method to insert the integer at the desired index.
After insertion, you can verify the contents of the vector.

Java Program

import java.util.Vector;

public class Main {
    public static void main(String[] args) {
        // Create a Vector of Integers
        Vector<Integer> numbers = new Vector<>();
        numbers.add(1);
        numbers.add(2);
        numbers.add(3);
        numbers.add(4);
        numbers.add(5);
        
        // Declare an integer to insert
        int newNumber = 10;
        
        // Index to insert
        int index = 2;
        
        // Insert the integer at the desired index
        numbers.insertElementAt(newNumber, index);
        
        // Print the updated vector
        System.out.println(numbers);
    }
}

Output

[1, 2, 10, 3, 4, 5]

2 Insert a String at Specific Index in a Vector

In this example,

Create a Vector of Strings using the Vector class.
Declare a string variable to insert into the vector.
Use the insertElementAt() method to insert the string at the desired index.
After insertion, you can verify the contents of the vector.

Java Program

import java.util.Vector;

public class Main {
    public static void main(String[] args) {
        // Create a Vector of Strings
        Vector<String> words = new Vector<>();
        words.add("apple");
        words.add("banana");
        words.add("orange");
        
        // Declare a string to insert
        String newWord = "grape";
        
        // Index to insert
        int index = 1;
        
        // Insert the string at the desired index
        words.insertElementAt(newWord, index);
        
        // Print the updated vector
        System.out.println(words);
    }
}

Output

[apple, grape, banana, orange]

Summary

In this tutorial, we learned How to Insert an Item at Specific Index in a Vector in Java language with well detailed examples.

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How to Insert an Item at Specific Index in a Vector in Java - Step by Step Examples

How to Insert an Item at Specific Index in a Vector in Java ?

Answer

✐ Examples

1 Insert an Integer at Specific Index in a Vector

Java Program

Output

2 Insert a String at Specific Index in a Vector

Java Program

Output

Summary

More Java Vectors Tutorials