Convert String to LocalDateTime and LocalDateTime to String in Java

The following code converts String to LocalDateTime in Java:

String datetimeStr = "2021-05-10 11:50:10";
DateTimeFormatter formatter = DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss");    
LocalDateTime localDateTime = LocalDateTime.parse(datetimeStr, formatter);
System.out.println("String to LocalDateTime = " + localDateTime);

Output:

The following code shows how to convert LocalDateTime to String in Java:

LocalDateTime currrentLocalDateTime = LocalDateTime.now();
DateTimeFormatter formatter = DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss");
String formattedLocalDateTime = currrentLocalDateTime.format(formatter);
System.out.println("LocalDateTime to String = " + formattedLocalDateTime);

Output: