ARRAYS

Hello friends Now I am going to post on the concept called arrays

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.

Creating Arrays:
~~~~~~~~~
You can create an array by using the new operator with the following syntax:

arrayRefVar = new dataType[arraySize];
The above statement does two things:

It creates an array using new dataType[arraySize];

It assigns the reference of the newly created array to the variable arrayRefVar.

Declaring an array variable, creating an array, and assigning the reference of the array to the variable can be combined in one statement, as shown below:

dataType[] arrayRefVar = new dataType[arraySize];
Alternatively you can create arrays as follows:

dataType[] arrayRefVar = {value0, value1, ..., valuek};
The array elements are accessed through the index. Array indices are 0-based; that is, they start from 0 to arrayRefVar.length-1.

Example:
Following statement declares an array variable, myList, creates an array of 10 elements of double type, and assigns its reference to myList.:

double[] myList = new double[10];
Following picture represents array myList. Here myList holds ten double values and the indices are from 0 to 9.

Example:
~~~~~~
Here is a complete example of showing how to create, initialize and process arrays:

public class TestArray {

public static void main(String[] args) {
double[] myList = {1.9, 2.9, 3.4, 3.5};

// Print all the array elements
for (int i = 0; i < myList.length; i++) {
System.out.println(myList[i] + " ");
}
// Summing all elements
double total = 0;
for (int i = 0; i < myList.length; i++) {
total += myList[i];
}
System.out.println("Total is " + total);
// Finding the largest element
double max = myList[0];
for (int i = 1; i < myList.length; i++) {
if (myList[i] > max) max = myList[i];
}
System.out.println("Max is " + max);
}
}
This would produce following result:

1.9
2.9
3.4
3.5
Total is 11.7
Max is 3.5