Java Math.random

crunchee · 14 Dec 2008 at 01:56

im using Math.random to generate random numbers but im looking to specify the range from it picks the numbers from eg. 66-100. does anyone know how to do this?

Hatter The Mad · 14 Dec 2008 at 02:09

http://letmegooglethatforyou.com/?q=java+random+number+range

crunchee · 14 Dec 2008 at 15:01

Hatter The Mad said:
http://letmegooglethatforyou.com/?q=java+random+number+range

nice, very nice. however, i had used google but couldn't find a straight answer thats why i asked here.

drak3 · 14 Dec 2008 at 15:20

crunchee said:
im using Math.random to generate random numbers but im looking to specify the range from it picks the numbers from eg. 66-100. does anyone know how to do this?

Code:

int number = 66 + new Random().nextInt(35);

The generator returns a number between 0 (inlcusive) and 35 (exlusive). Since the number is an integer it will range between 0 - 34 inclusive.

Now let us look at the bounds:

Assuming the number returned was 0, then 66 + 0 = 66.

Assuming the number returned was 34, then 66 + 34 = 100.

Everything else will sit in between.

PS: The Java API is your friend.