initialization_with_size.md

Initialization with Size

The Nintendo GameBoy had a screen resolution of 160 x 144. To store the value of each pixel¹ you would need an array 23,040 items long.

To support this without you writing the word false 23,040 times, arrays can be made just by giving a size and skipping the initializer.

boolean[] pixels = new boolean[23040];

So you have to say new followed by the type of element in the array, [, the size of the array and ].

Footnotes

1. The original GameBoy wasn't actually just black and white. It supported 7 shades of gray, so a boolean wouldn't technically be enough to represent a pixel's state. You'd have to use something with at least 8 states, not just 2. ↩