Course Description

Introduction to Array and Vectors in Java

Arrays and Vectors are fundamental data structures in Java programming. They are used to store multiple values of the same data type in a single variable, making it easier to manage and manipulate data efficiently. Understanding how arrays and vectors work is essential for any Java programmer.

Arrays in Java

In Java, an array is a collection of similar data types that are stored in contiguous memory locations. Arrays have a fixed size that is defined at the time of declaration. Elements in an array can be accessed using their index, starting from 0 to the length of the array minus one.

For example, to declare an array of integers in Java:

int[] numbers = new int[5];

This creates an integer array named 'numbers' with a size of 5. Elements in the array can be accessed and modified using index notation, such as numbers[0], numbers[1], etc.

Vectors in Java

Vectors are dynamic arrays in Java that can grow or shrink in size dynamically. Unlike arrays, vectors are part of the Java Collections Framework and provide additional functionality such as adding, removing, and searching for elements.

To create a vector in Java:

Vector names = new Vector<>();