gistfile1.txt

import java.util.Arrays;

public class Compute {

	int[] numbers;
	int min = Integer.MAX_VALUE;
	int max = Integer.MIN_VALUE;
	double mean = 0.0;

	public Compute(int[] numbers) {
		super();
		this.numbers = numbers;
		Arrays.sort(numbers);
	}

	public int min() {
		return numbers[0];
	}

	public int max() {
		return numbers[numbers.length - 1];
	}

	public double median() {
		if (numbers.length % 2 == 0) {
			return (numbers[numbers.length / 2] + numbers[(numbers.length / 2) + 1]) / 2;
		} else {
			return numbers[(int) Math.ceil((double) (numbers.length / 2))];
		}
	}

	public double standardDeviation() {

		double mean = 0;
		for (int i : numbers) {
			mean += i;
		}

		this.mean = mean / numbers.length;

		double ssum = 0.0;
		for (int i : numbers) {
			ssum += (i - this.mean) * (i - this.mean);
		}

		return Math.sqrt(ssum / numbers.length);
	}

}