What is the alternative for getMonthValue(),getDayOfMonth() in java 7?-CodePudding

SimpleDateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss.SSSSSSSSS");
Date date = new Date();

How Do I make this Java 7 compatible? What changes should I do?

String part = date.getYear()   ""   String.format("d", date.getMonthValue())   ""
          String.format("d", date.getDayOfMonth())   ""   String.format("d", date.getHour())   ""
          String.format("d", date.getMinute())   ""   String.format("d", date.getSecond());

CodePudding user response：

The terrible Date, Calendar, and SimpleDateFormat classes were supplanted by the modern java.time classes defined in JSR 310 and built into Java 8 .

For Java 6 and 7, add the back-port of java.time to your project, the ThreeTen-Backport library. The API is nearly identical to *java.time, so later upgrading your project to modern Java will involve little more than changing the import statements.

As you may know, Java 6 and 7 are years past their end-of-life. I suggest you consider migrating to Java 8, 11, or 17, if at all possible.

CodePudding user response：

Use a SimpleDateFormat if upgrading Java (from version 7) is not possible and to avoid any external library:

DateFormat dateFormat = new SimpleDateFormat("yyyyMMddHHmmss");
Date date = new Date();
String part = dateFormat.format(date);

Pattern can be changes as needed: see documentation of the SimpleDateFormat class.

As already advised in this answer, upgrade to a newer Java and then use the classes from java.time package and sub-packages (like DateTimeFormatter).