problem with Random()

[doomer999]

Hi,

I have some problems with Random(). My code is as follows.

Random random = new Random();
private int rand(int scale) {
return (random.nextInt() << 1 >>> 1) % scale;
}

Whenever I write something like:

int number = rand(9);

It has null pointer exception.
But if I use the above rand() function without assigning it to an integer, it works. eg:

g.drawString("Number: " + rand(9), 0, 0, Graphics.LEFT | Graphics.TOP);

Would you please tell me what is wrong?

Thank you
Nelson

[jalev]

Hello

Maybe you could use this;

// example int limit = 100;

int num = (int) (Math.abs(rnd.nextInt() % limit);

This gives you only positive Integers from 0 - limit;

I hope this helps you out

[dpolyakov]

May be you need this one? check it out:

static Random m_rnd = new Random();

public static int GetRnd(int min, int max)
{
int z = max - min;
int r = m_rnd.nextInt() % z;
return (min + Math.abs(r));
}