CODEWITHSUNDEEP
javaarrays
Sarah
Sarah

Reputation: 25

Fill 2D Array With Some Probability?

I have a 4x4 2D array which I need to fill with 1's randomly with probability p (from 0.1 to 1.0), or 0 otherwise. I also need to throw an exception if some nonsense value of p is entered e.g. 0 or -1, how can I do this? Thanks!

public GameState(double p) throws Exception 
{
    int[][] grid = new int[4][4];
    Random r = new Random().nextDouble();
    for (int i = 0; i < 4; i++)
    {
        for (int j = 0; j < 4; j++)
        {
            if (r <= p)
            {
                //grid[i][j] = ;
            }
            else
            {
                //grid[i][j] = ;
            }
        }
    }
}

Upvotes: 0

Views: 419

Answers (1)

OferP
OferP

Reputation: 393

you can see here how to implement Random (which will solve your probability question): Probability in Java

about the exception - In the beginning of the method, just write something like

if (p <0 || p >1) {
    throw new Exception()
}

Upvotes: 2

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