public class StringUtils {
	public static String formatDouble(double d) {
		if (d < 1000.0)
			return String.format("%.2f", d).replace(",", ".");
		if (d < 1000000.0)
			return String.format("%.2f", d / 1000.0).replace(",", ".") + "K";
		if (d < 1.0E9)
			return String.format("%.2f", d / 1000000.0).replace(",", ".") + "M";
		return String.format("%.2f", d / 1.0E9).replace(",", ".") + "B";
	}

	public static Double fixDouble(int i, double d) {
		return Double.valueOf(String.format("%." + i + "f", d).replace(",", "."));
	}

	public static String trim(String string) {
		if (string.length() > 16)
			return string.substring(0, 16);
		return string;
	}

	public static String arrayToString(String[] strings, int start, int end) {
		StringBuilder stringBuilder = new StringBuilder();
		for (int i = start; i <= end; ++i)
			stringBuilder.append(strings[i]).append(" ");
		return stringBuilder.toString();
	}
}