How to convert String inot a LocalDate object

Question

I have a String value as follows

2018-12-05 18:11:27.187

How can I can convert it into a LocalDate object based on that format "MM/dd/YYYY HH:mm:ss" ?

Answer 1

a LocalDate object is what it is. It has no format; it is an object with methods; these methods make it do stuff.

You can for example ask a localdate to return the year of the date it represents. You can also ask it to render itself as a string using some format. That string is then not a LocalDate (it is a String).

Furthermore, a localdate represents a date. Hence the name. 'hour' is not part of a date. YYYY is the pattern for week based year. You don't want that.

So, fixing your misconceptions, we end up with:

DateTimeFormatter inFormat = DateTimeFormatter.ofPattern("uuuu-MM-dd HH:mm:ss.SSS");
DateTimeFormatter outFormat = DateTimeFormatter.ofPattern("MM/dd/uuuu HH:mm:ss");

LocalDateTime when = LocalDateTime.parse("2018-12-05 18:11:27.187", inFormat);
System.out.println(outFormat.format(when));