Format

Format.java

package common;

public class Format {
	private static final String[] BYTE_UNITS = new String[] { "b", "Kb", "Mb", "Gb" };
	private static final int[] BYTE_STEPS = new int[] { 1024, 1024, 1024, 1024 };
	private static final String[] TIME_UNITS = new String[] { "msec", "sec", "min", "h", "day", "week", "year" };
	private static final int[] TIME_STEPS = new int[] { 1000, 60, 60, 24, 7, 52, 100 };

	public static String format(String[] unit, int[] step, double value) {
		int i = 0;
		while (i < unit.length-1 && value >= step[i]) {
			value = value / step[i++];
		}
		return String.format("%2.2f", value) + " " + unit[i];
	}

	public static String bytes(double value) {
		return format(BYTE_UNITS, BYTE_STEPS, value);
	}

	public static String time(double value) {
		return format(TIME_UNITS, TIME_STEPS, value);
	}

	public static String nanotime(double value) {
		return time(value / 1000);
	}
}