Creating SimpleDateFormat is expensive. Don’t use this unless it’s done seldom. OK if you can live with a bit of blocking. Use if formatDate() is not used much. Fastest option IF you reuse threads (thread pool). Uses more memory than 2. and has higher startup overhead. For applications both 2. and 3. are viable options. … Read more
SimpleDateFormat dateFormat = new SimpleDateFormat(“EEEE dd MMM yyyy”, Locale.ENGLISH); String formatted = dateFormat.format(the_date_you_want_here);
Date and time formats are well described below SimpleDateFormat (Java Platform SE 7) – Date and Time Patterns There could be n Number of formats you can possibly make. ex – dd/MM/yyyy or YYYY-‘W’ww-u or you can mix and match the letters to achieve your required pattern. Pattern letters are as follow. G – Era … Read more
The date you are parsing is in ISO 8601 format. In Java 7 the pattern to read and apply the timezone suffix should read yyyy-MM-dd’T’HH:mm:ssX
The issue for you is that you are using mm. You should use MM. MM is for month and mm is for minutes. Try with yyyy-MM-dd HH:mm Other approach: It can be as simple as this (other option is to use joda-time) static final long ONE_MINUTE_IN_MILLIS=60000;//millisecs Calendar date = Calendar.getInstance(); long t= date.getTimeInMillis(); Date afterAddingTenMins=new … Read more
If you want to convert an Instant to a Date: Date myDate = Date.from(instant); And then you can use SimpleDateFormat for the formatting part of your question: SimpleDateFormat formatter = new SimpleDateFormat(“dd MM yyyy HH:mm:ss”); String formattedDate = formatter.format(myDate);
Update There has been recent improvements in datetime API with JSR-310. Instant now = Instant.now(); Instant yesterday = now.minus(1, ChronoUnit.DAYS); System.out.println(now); System.out.println(yesterday); https://ideone.com/91M1eU Outdated answer You are subtracting the wrong number: Use Calendar instead: private Date yesterday() { final Calendar cal = Calendar.getInstance(); cal.add(Calendar.DATE, -1); return cal.getTime(); } Then, modify your method to the following: … Read more
This should display ‘Tue’: new SimpleDateFormat(“EEE”).format(new Date()); This should display ‘Tuesday’: new SimpleDateFormat(“EEEE”).format(new Date()); This should display ‘T’: new SimpleDateFormat(“EEEEE”).format(new Date()); So your specific example would be: new SimpleDateFormat(“yyyy-MM-EEE”).format(new Date());
// https://github.com/google/guava import static com.google.common.base.Preconditions.*; String getDayOfMonthSuffix(final int n) { checkArgument(n >= 1 && n <= 31, “illegal day of month: ” + n); if (n >= 11 && n <= 13) { return “th”; } switch (n % 10) { case 1: return “st”; case 2: return “nd”; case 3: return “rd”; default: return … Read more
You cannot expect to parse a date with a SimpleDateFormat that is set up with a different format. To parse your “Thu Jun 18 20:56:02 EDT 2009” date string you need a SimpleDateFormat like this (roughly): SimpleDateFormat parser=new SimpleDateFormat(“EEE MMM d HH:mm:ss zzz yyyy”); Use this to parse the string into a Date, and then … Read more