从

SimpleDateFormat开始,这将允许您解析和格式化时间值,例如……

SimpleDateFormat sdf = new SimpleDateFormat("hh:mm a");

try {

// Get the start time..

Date start = sdf.parse("09:00 AM");

System.out.println(sdf.format(start));

} catch (ParseException ex) {

ex.printStackTrace();

}

有了这个,您就可以使用Calendar来操作日期值的各个字段……

Calendar cal = Calendar.getInstance();

cal.setTime(start);

cal.add(Calendar.MINUTE, 45);

Date end = cal.getTime();

把它们放在一起……

SimpleDateFormat sdf = new SimpleDateFormat("hh:mm a");

try {

Date start = sdf.parse("09:00 AM");

Calendar cal = Calendar.getInstance();

cal.setTime(start);

cal.add(Calendar.MINUTE, 45);

Date end = cal.getTime();

System.out.println(sdf.format(start) + " to " + sdf.format(end));

} catch (ParseException ex) {

ex.printStackTrace();

}

输出时间为09:00 AM至09:45 AM

更新

或者你可以使用JodaTime ……

DateTimeFormatter dtf = new DateTimeFormatterBuilder().appendHourOfDay(2).appendLiteral(":").appendMinuteOfHour(2).appendLiteral(" ").appendHalfdayOfDayText().toFormatter();

LocalTime start = LocalTime.parse("09:00 am", dtf);

LocalTime end = start.plusMinutes(45);

System.out.println(start.toString("hh:mm a") + " to " + end.toString("hh:mm a"));

或者,如果您使用的是Java 8,那么新的日期/时间API ……

DateTimeFormatter dtf = new DateTimeFormatterBuilder().appendPattern("hh:mm a").toFormatter();

LocalTime start = LocalTime.of(9, 0);

LocalTime end = start.plusMinutes(45);

System.out.println(dtf.format(start) + " to " + dtf.format(end));