Java 8 Date Time Formatting

java.util.Date

DateFormat dateFormat = new SimpleDateFormat("yyyy/MM/dd HH:mm:ss");
Date date = new Date();
System.out.println(dateFormat.format(date)); //2016/12/08 10:15:43

java.util.Calendar

DateFormat dateFormat = new SimpleDateFormat("yyyy/MM/dd HH:mm:ss");
Calendar cal = Calendar.getInstance();
System.out.println(dateFormat.format(cal)); //2016/12/08 10:16:32

java.time.LocalDateTime

DateTimeFormatter dtf = DateTimeFormatter.ofPattern("yyyy/MM/dd HH:mm:ss");
LocalDateTime now = LocalDateTime.now();
System.out.println(dtf.format(now)); //2016/12/08 10:17:12

java.time.LocalDate

DateTimeFormatter dtf = DateTimeFormatter.ofPattern("yyyy/MM/dd");
LocalDate localDate = LocalDate.now();
System.out.println(dtf.format(localDate)); //2016/12/08

java.time.ZonedDateTime

DateTimeFormatter dateTimeFormat = DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss.SSS");
ZonedDateTime zonedDateTime = ZonedDateTime.now();
System.out.println(zonedDateTime.format(dateTimeFormat)); //2016-12-08 00:22:44:66.777

Legacy
https://docs.oracle.com/javase/tutorial/datetime/iso/legacy.html

Javadocs
https://docs.oracle.com/javase/8/docs/api/java/util/Date.html
https://docs.oracle.com/javase/8/docs/api/java/util/Calendar.html
https://docs.oracle.com/javase/8/docs/api/java/time/LocalDate.html
https://docs.oracle.com/javase/8/docs/api/java/time/LocalDateTime.html
https://docs.oracle.com/javase/8/docs/api/java/text/DateFormat.html
https://docs.oracle.com/javase/8/docs/api/java/text/SimpleDateFormat.html
https://docs.oracle.com/javase/8/docs/api/java/time/format/DateTimeFormatter.html

https://docs.oracle.com/javase/8/docs/api/java/time/ZonedDateTime.html