Java tutorial
//package com.java2s; import java.text.ParseException; import java.text.SimpleDateFormat; import java.util.Arrays; import java.util.Date; import java.util.List; import java.util.Locale; import java.util.TimeZone; public class Main { /** * Date formats using for Date parsing. */ private static final List<ThreadLocal<SimpleDateFormat>> DATETIME_FORMATS = Arrays .asList(new ThreadLocal<SimpleDateFormat>() { @Override protected SimpleDateFormat initialValue() { SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss'Z'", Locale.US); format.setTimeZone(TimeZone.getTimeZone("UTC")); return format; } }, new ThreadLocal<SimpleDateFormat>() { @Override protected SimpleDateFormat initialValue() { SimpleDateFormat format = new SimpleDateFormat("EEE, dd MMM yyyy HH:mm:ss zzz", Locale.US); format.setTimeZone(TimeZone.getTimeZone("UTC")); return format; } }, new ThreadLocal<SimpleDateFormat>() { @Override protected SimpleDateFormat initialValue() { SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss.sss'Z'", Locale.US); format.setTimeZone(TimeZone.getTimeZone("UTC")); return format; } }, new ThreadLocal<SimpleDateFormat>() { @Override protected SimpleDateFormat initialValue() { SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ssZ", Locale.US); format.setTimeZone(TimeZone.getTimeZone("UTC")); return format; } }, new ThreadLocal<SimpleDateFormat>() { @Override protected SimpleDateFormat initialValue() { SimpleDateFormat format = new SimpleDateFormat("EEE MMM dd HH:mm:ss zzz yyyy", Locale.US); format.setTimeZone(TimeZone.getTimeZone("UTC")); return format; } }, new ThreadLocal<SimpleDateFormat>() { @Override protected SimpleDateFormat initialValue() { SimpleDateFormat format = new SimpleDateFormat("EEEEEE, dd-MMM-yy HH:mm:ss zzz", Locale.US); format.setTimeZone(TimeZone.getTimeZone("UTC")); return format; } }, new ThreadLocal<SimpleDateFormat>() { @Override protected SimpleDateFormat initialValue() { SimpleDateFormat format = new SimpleDateFormat("EEE MMMM d HH:mm:ss yyyy", Locale.US); format.setTimeZone(TimeZone.getTimeZone("UTC")); return format; } }); /** * Loops over all the possible date formats and tries to find the right one. * * @param value ISO date string * @return Null if there is a parsing failure */ public static Date parseDate(String value) { if (value == null) { return null; } Date date = null; for (ThreadLocal<SimpleDateFormat> format : DATETIME_FORMATS) { try { date = format.get().parse(value); break; } catch (ParseException e) { // We loop through this until we found a valid one. } } return date; } }