How to generate a random hour?

how to generate a random hour in Java?

generate a random int [0,24)

but how?
can you give an example please?

Something like this will return you an int with a low of 0 and a high of 23:

int hour = pickHour(24);

Code:

---

public int pickHour( int upperLimit )
{
    Random generator = new Random();
    return generator.nextInt(upperLimit);
}

---