Java tutorial
//package com.java2s; //License from project: Apache License import java.text.ParseException; import java.text.SimpleDateFormat; import java.util.Calendar; import java.util.Date; import java.util.Locale; public class Main { public static String getTimeQuantum(String strDate, String format) { Date data = getDateByFormat(strDate, format); Calendar calendar = Calendar.getInstance(); calendar.setTime(data); int hour = calendar.get(Calendar.HOUR_OF_DAY); if (hour >= 12) { return "PM"; } else { return "AM"; } } public static Date getDateByFormat(String strDate, String format) { SimpleDateFormat mSimpleDateFormat = new SimpleDateFormat(format, Locale.CHINA); Date date = null; try { date = mSimpleDateFormat.parse(strDate); } catch (ParseException e) { e.printStackTrace(); } return date; } }