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Java Arrays

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In Java, an array is a container object that holds a fixed number of values of a single type. The length of an array is established when the array is created. After creation, its length is fixed.

Here is the syntax for creating an array in Java:

type[] arrayName; // creates an array reference
arrayName = new type[arraySize]; // creates an array of the specified size

// or, the two steps can be combined:
type[] arrayName = new type[arraySize];

Here is an example of creating and initializing an array of integers:

int[] numbers = new int[5]; // creates an array of size 5

// initialize the elements of the array
numbers[0] = 10;
numbers[1] = 20;
numbers[2] = 30;
numbers[3] = 40;
numbers[4] = 50;

You can also use the short form of array initialization:

int[] numbers = {10, 20, 30, 40, 50};

To access an element of an array, use the array index in square brackets:

int x = numbers[2]; // x is 30

To iterate over the elements of an array, you can use a for loop:

for (int i = 0; i < numbers.length; i++) {
  int n = numbers[i];
  System.out.println(n);
}

Java Arrays

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