Getting dynamic with arrays

As we discussed at the beginning of all this array stuff, if we need to declare and initialize each element of an array individually, there isn't a huge amount of benefit to an array over regular variables. Let's look at an example of declaring and initializing arrays dynamically.

Dynamic array example

Let's make a simple dynamic array example. You can get the working project for this example in the download bundle. It is in Chapter 12/Dynamic Array Example/MainActivity.java.

Create a project with an empty Activity and call the project Dynamic Array Example. Leave the Activity name as the default MainActivity as we will not be revisiting this project we are not concerned about using memorable names.

Type the following code just after the call to super.onCreate() in the onCreate method. See if you can work out what the output will be before we discuss it and analyze the code.

// Declaring and allocating in one step
int[] ourArray = new int[1000];

// Let's initialize...