Method uniformInt

src/main/java/edu/princeton/cs/algs4/StdRandom.java:159–162

Returns a random integer uniformly in [0, n). @param n number of possible integers @return a random integer uniformly between 0 (inclusive) and n (exclusive) @throws IllegalArgumentException if n <= 0

(int n)

     * @throws IllegalArgumentException if {@code n <= 0}
     */
    public static int uniformInt(int n) {
        if (n <= 0) throw new IllegalArgumentException("argument must be positive: " + n);
        return random.nextInt(n);
    }

    /**
     * Returns a random long integer uniformly in [0, n).