sparklines in Java... WTF

spark.java

public class spark {
    public static double[] normalize(double[] nums) {
	double min = nums[0];
	double max = nums[0];
	for (int ii = 0; ii < nums.length; ii++) {
	    min = Math.min(nums[ii], min);
	    max = Math.max(nums[ii], max);
	}
	double[] result = new double[nums.length];
	for (int ii = 0; ii < nums.length; ii++) {
	    result[ii] = (nums[ii] - min) / (max - min);
	}
	return result;
    }

    public static String blocks = "▁▂▃▄▅▆▇";

    public static String sparkline(double[] nums) {
	double[] normalized = normalize(nums);
	StringBuilder sb = new StringBuilder();
	for (int ii = 0; ii < normalized.length; ii++) {
	    int idx = (int)Math.round(normalized[ii] * 6.0);
	    sb.append(blocks.substring(idx, idx + 1));
	}
	return sb.toString();
    }
    
    public static void main(String[] args) {
	double[] nums = new double[args.length];
	for (int ii = 0; ii < args.length; ii++) {
	    nums[ii] = Double.parseDouble(args[ii]);
	}
	System.out.println(sparkline(nums));
    }
}