開發日誌：計算Java內一段代碼運行所用的時間

		Date startTime = new Date();
		
		Thread.sleep(1000);//邏輯代碼
		
		Date endTime = new Date();
		long lt = endTime.getTime() - startTime.getTime();
		long day = lt / (24 * 60 * 60 * 1000);
		long hour = (lt / (60 * 60 * 1000) - day * 24);
		long min = ((lt / (60 * 1000)) - day * 24 * 60 - hour * 60);
		long s = (lt / 1000 - day * 24 * 60 * 60 - hour * 60 * 60 - min * 60);
		String msg = "消耗時間:"+hour + "時" + min + "分" + s + "秒(共" +lt +"毫秒)";
		System.out.println(msg);