Java – before I need to reset, I can use randomgenerator How many times does nextdouble()?

I use the random class in Java as a pseudo - random number generator I am using the function nextdouble many times (~ 10 ^ 5) How many times do I need to replay to prevent getting the same number? Does it need to be replanted?

Random generator = new Random();
    double[] numbers = new double[n];
    for (int i = 0; i < n; i++) numbers[i] = generator.nextDouble();

This is an experiment. Numbers will be used as coordinates of points in space, so I want to distribute them as evenly as possible

How can I replant? Where do I get int seeds?

Solution

The random number generator generates a random double from two random int values The internal seed has 48 bits, so the random sequence repeats after up to 2 ^ 48 int values or 2 ^ 47 double values