converts time on format like: "1d14h5min5sec40ms" to millis or vice versa

TimeFlowParser.java

import java.util.LinkedHashMap;
import java.util.Map;
import java.util.Map.Entry;
import java.util.concurrent.TimeUnit;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

/**
 * 
 * @author Sythelux Rikd
 *
 */
public class TimeFlowParser {
	/** Pattern for time parsing: "(\\d.*d)|(\\d.*h)|(\\d.*min)|(\\d.*sec)|(\\d.*ms)" */
	public static final Pattern					TIMEPATTERN	= Pattern.compile("(\\d.*d)|(\\d.*h)|(\\d.*min)|(\\d.*sec)|(\\d.*ms)");
	/** contains entries for d:day, h:hour, min:minute, sec:second, ms:millisecond */
	public static final Map<String, TimeUnit>	TS_SHORTS	= new LinkedHashMap<String, TimeUnit>();
	static {
		TS_SHORTS.put("d", TimeUnit.DAYS);
		TS_SHORTS.put("h", TimeUnit.HOURS);
		TS_SHORTS.put("min", TimeUnit.MINUTES);
		TS_SHORTS.put("sec", TimeUnit.SECONDS);
		TS_SHORTS.put("ms", TimeUnit.MILLISECONDS);
	}

	/** parse a String that is like Pattern. Examples:
	 * <ul>
	 * <li>"1000ms"</li>
	 * <li>"15sec"</li>
	 * <li>"5min"</li>
	 * <li>"5sec340ms"</li>
	 * <li>"5min5sec40ms"</li>
	 * <li>"1d14h5min5sec40ms"</li>
	 * </ul>
	 * 
	 * @param timeString a String that can be parsed from pattern above
	 * @return long milliseconds*/
	public static long Parse(String timeString) {
		long millis = 0;
		Matcher matcher = TIMEPATTERN.matcher(timeString);
		while (matcher.find()) {
			String group = matcher.group();
			int tempTime = Integer.parseInt(group.replaceAll("\\D", ""));
			TimeUnit tempTU = TS_SHORTS.get(group.replaceAll("\\d", ""));
			millis += tempTU.toMillis(tempTime);
		}
		return millis;
	}

	/**
	 * converts millis to a string that is compatible to Pattern above
	 * @param millis millliseconds in long
	 * @return String like "1d14h5min5sec40ms"
	 */
	public static String Build(long millis) {
		String retVal = "";
		long[] vals = new long[TS_SHORTS.size()];
		int i = 0;
		for (Entry<String, TimeUnit> entry : TS_SHORTS.entrySet()) {
			vals[i] = entry.getValue().convert(millis, TimeUnit.MILLISECONDS);
			millis -= entry.getValue().toMillis(vals[i]);
			if (vals[i] != 0) {
				retVal += vals[i] + entry.getKey();
			}
			i++;
		}
		return retVal;
	}
}