//Default pattern

​

LocalDateTime today = LocalDateTime.parse("2019-03-27T10:15:30");

System.out.println(today);

​

//Custom pattern

​

DateTimeFormatter formatter = DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss a");

LocalDateTime dateTime = LocalDateTime.parse("2019-03-27 10:15:30 AM", formatter);

System.out.println(dateTime);

//convert String to LocalDateTime

String str = "2016-03-04 11:30";

DateTimeFormatter formatter = DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm");

LocalDateTime dateTime = LocalDateTime.parse(str, formatter);