Question

I need to do a random with a 16-digit number. And the random function I got doesn’t work with big numbers. I got this function:

 int pin = new Random().nextInt(10000); 

But if I put a big number like 1000000000000, it won’t work because it’s not int, and the nextLong is not working to me like that.
Thanks.

Answer 1

You could concatenate two random numbers to create a longer random number.

So:

1. Get an 8 digit random number using nextInt(100000000).
2. Bit shift it 8 tens digits, or about 10 bits to the left.
3. Get a second 8 digit random number.
4. Bitwise OR the two numbers to get your final Long random number.

Does that make sense?