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    <p>I tried to implement a simple (static) class that emulates some of the patterns of PHP's <code>strtotime</code>. This class is designed to be <strong>open for modification</strong> (simply add a new <code>Matcher</code> via <code>registerMatcher</code>):</p> <pre><code>public final class strtotime { private static final List&lt;Matcher&gt; matchers; static { matchers = new LinkedList&lt;Matcher&gt;(); matchers.add(new NowMatcher()); matchers.add(new TomorrowMatcher()); matchers.add(new DateFormatMatcher(new SimpleDateFormat("yyyy.MM.dd G 'at' HH:mm:ss z"))); matchers.add(new DateFormatMatcher(new SimpleDateFormat("EEE, d MMM yyyy HH:mm:ss Z"))); matchers.add(new DateFormatMatcher(new SimpleDateFormat("yyyy MM dd"))); // add as many format as you want } // not thread-safe public static void registerMatcher(Matcher matcher) { matchers.add(matcher); } public static interface Matcher { public Date tryConvert(String input); } private static class DateFormatMatcher implements Matcher { private final DateFormat dateFormat; public DateFormatMatcher(DateFormat dateFormat) { this.dateFormat = dateFormat; } public Date tryConvert(String input) { try { return dateFormat.parse(input); } catch (ParseException ex) { return null; } } } private static class NowMatcher implements Matcher { private final Pattern now = Pattern.compile("now"); public Date tryConvert(String input) { if (now.matcher(input).matches()) { return new Date(); } else { return null; } } } private static class TomorrowMatcher implements Matcher { private final Pattern tomorrow = Pattern.compile("tomorrow"); public Date tryConvert(String input) { if (tomorrow.matcher(input).matches()) { Calendar calendar = Calendar.getInstance(); calendar.add(Calendar.DAY_OF_YEAR, +1); return calendar.getTime(); } else { return null; } } } public static Date strtotime(String input) { for (Matcher matcher : matchers) { Date date = matcher.tryConvert(input); if (date != null) { return date; } } return null; } private strtotime() { throw new UnsupportedOperationException(); } } </code></pre> <h2>Usage</h2> <p>Basic usage:</p> <pre><code> Date now = strtotime("now"); Date tomorrow = strtotime("tomorrow"); </code></pre> <pre> Wed Aug 12 22:18:57 CEST 2009 Thu Aug 13 22:18:57 CEST 2009 </pre> <h2>Extending</h2> <p>For example let's add <strong>days matcher</strong>:</p> <pre><code>strtotime.registerMatcher(new Matcher() { private final Pattern days = Pattern.compile("[\\-\\+]?\\d+ days"); public Date tryConvert(String input) { if (days.matcher(input).matches()) { int d = Integer.parseInt(input.split(" ")[0]); Calendar calendar = Calendar.getInstance(); calendar.add(Calendar.DAY_OF_YEAR, d); return calendar.getTime(); } return null; } }); </code></pre> <p>then you can write:</p> <pre><code>System.out.println(strtotime("3 days")); System.out.println(strtotime("-3 days")); </code></pre> <p>(now is <code>Wed Aug 12 22:18:57 CEST 2009</code>)</p> <pre> Sat Aug 15 22:18:57 CEST 2009 Sun Aug 09 22:18:57 CEST 2009 </pre>
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    1. POPHP's strtotime() in Java
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    1. CO@downvoter: please explain your downvote or it is pointless
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    2. CO@dfa - I was downvoted too, as I recall I had two votes last night. I think someone wen on a rampage :(
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    3. COthis is not exactly as changing the Java syntax, it is only a library class
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