Snippet for creating an hbase shell compatible ID from a UUID and given date. Modify to suit your needs.

IdUtil.java

public static String hbaseShellId(String id, Date d) throws IOException {
      byte[] idBytes = IdUtil.nonRandByteBucketizeId(id, d);
	    StringBuilder sb = new StringBuilder("\"\\x");
	    sb.append(String.format("%02x", idBytes[0]));
	    sb.append((new String(idBytes)).substring(1));
	    sb.append("\"");
	    return sb.toString();
}
	
public static void main(String[] args) throws IOException {
      String id = UUID.randomUUID().toString();
	    Calendar cal = Calendar.getInstance();
	    cal.set(2013, Calendar.FEBRUARY, 8);
	    System.out.println(IdUtil.hbaseShellId(id, cal.getTime()));
}