@Override
	public BigInteger max() {
		return _max;
	}
Create a new random {@code DoubleChromosome} of length one.

@param min the minimal value of this chromosome (inclusively).
@param max the maximal value of this chromosome (exclusively).
@throws NullPointerException if one of the arguments is {@code null}.
jenetics.ext/src/main/java/io/jenetics/ext/BigIntegerChromosome.java