How to Initialize a Vector in Java - Step by Step Examples

How to Initialize a Vector in Java ?

Answer

To initialize a vector in Java, you can use the Vector class from the java.util package, which provides a dynamic array that can grow as needed.

✐ Examples

1 Initialize a Vector of Integers

In this example,

We import the java.util.Vector class.
We create a Vector of integers using the Vector class and provide initial values using the add method.
The vector is then assigned to a variable named intVector.
Finally, we use an enhanced for loop to iterate over the vector and print each element.

Java Program

import java.util.Vector;

public class Main {
    public static void main(String[] args) {
        Vector<Integer> intVector = new Vector<>();
        intVector.add(1);
        intVector.add(2);
        intVector.add(3);
        intVector.add(4);
        intVector.add(5);
        for (int num : intVector) {
            System.out.print(num + " ");
        }
    }
}

Output

1 2 3 4 5

2 Initialize a Vector of Strings

In this example,

We import the java.util.Vector class.
We create a Vector of strings using the Vector class and provide initial values using the add method.
The vector is then assigned to a variable named strVector.
Finally, we use an enhanced for loop to iterate over the vector and print each element.

Java Program

import java.util.Vector;

public class Main {
    public static void main(String[] args) {
        Vector<String> strVector = new Vector<>();
        strVector.add("apple");
        strVector.add("banana");
        strVector.add("cherry");
        for (String str : strVector) {
            System.out.print(str + " ");
        }
    }
}

Output

apple banana cherry

3 Initialize a Vector of Booleans

In this example,

We import the java.util.Vector class.
We create a Vector of booleans using the Vector class and provide initial values using the add method.
The vector is then assigned to a variable named boolVector.
Finally, we use an enhanced for loop to iterate over the vector and print each element.

Java Program

import java.util.Vector;

public class Main {
    public static void main(String[] args) {
        Vector<Boolean> boolVector = new Vector<>();
        boolVector.add(true);
        boolVector.add(false);
        boolVector.add(true);
        for (Boolean bool : boolVector) {
            System.out.print(bool + " ");
        }
    }
}

Output

true false true

Summary

In this tutorial, we learned How to Initialize a Vector in Java language with well detailed examples.

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How to Initialize a Vector in Java - Step by Step Examples

How to Initialize a Vector in Java ?

Answer

✐ Examples

1 Initialize a Vector of Integers

Java Program

Output

2 Initialize a Vector of Strings

Java Program

Output

3 Initialize a Vector of Booleans

Java Program

Output

Summary

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