JDK8中的Date

LocalDate localDate = LocalDate.now();
LocalTime localTime = LocalTime.now();
LocalDateTime localDateTime = LocalDateTime.now();
System.out.println(localDate);
System.out.println(localTime);
System.out.println(localDateTime);      

输出结果

• 2021-12-06
• 10:07:47.648
• 2021-12-06T10:07:47.648

LocalTime、LocalDate、LocalDateTime的set方法是有返回值的，体现了不可变性。