Arrays in Java
In Java, an array is a data structure that allows you to store multiple values of the same type in a single variable. It provides a convenient way to work with collections of data. Each value in an array is called an element, and each element is accessed by its index. The index starts from 0 for the first element and increments by 1 for each subsequent element.
Arrays in Java have a fixed size, meaning once the array is created, you cannot change its size. The size of an array is specified during its creation and remains constant throughout the program. Arrays can be created for any data type, including primitive types and objects.
To declare and initialize an array in Java, you can use the following syntax:
data_type[] array_name = new data_type[array_length];
For example, to create an array of integers with a length of 5, you can use the following code:
int[] numbers = new int[5];
You can also initialize an array with specific values using an array initializer:
int[] numbers = {1, 2, 3, 4, 5};
Arrays can be accessed using the index, which is enclosed in square brackets ([]). For example, to access the second element of the "numbers" array, you can use:
int secondNumber = numbers[1];
Arrays in Java provide various methods and properties for manipulation, such as getting the length of an array, iterating over the elements using loops, sorting, searching, and more.
It's important to note that arrays in Java are zero-indexed, meaning the first element is accessed using index 0. Accessing an element using an invalid index will result in an "ArrayIndexOutOfBoundsException."
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