Java Array

Java Array

An Array is used to store a collection of data of similar datatype. Arrays always start with the index of 0.

Syntax:

dataType[] name_of_array;   // preferred way.
or
dataType name_of_array[];  //  works but not preferred way

Code snippets of above syntax:

double[] list; //preferred way.
or 
double list[]; //works but not preferred way.

Note: The style double list[] is not preferred as it comes from the C/C++ language and was adopted in Java to accommodate C/C++ programmers.

Creating Arrays:

dataType[] name_of_array = new dataType[arraySize];

Code snippets of the above syntax:

double[] List = new double[10];

Another way to create an Array:

dataType[] name_of_array = {value0, value1, ..., valuek};

Code snippets of above syntax:

double[] list = {1, 2, 3, 4};

Example of code:

int[] a = new int[] {4,5,6,7,8}; //declare array
for (int i=0; i<a.length; i++) //loop goes through each index
{
    System.out.println(a[i]); //prints the array
}

🚀 Run Code

Output:

4
5
6
7
8

Source: Java Arrays