Working with Time and Date in Java

Working with time and date in Java is essential to any project.

There are three important classes you can use:

  • java.time.LocalTime – working only with time.
  • java.time.LocalDate – working only with date.
  • java.time.LocalDateTime – working with time and date both.

All three classes provide two essential methods:

  • of(arguments) – accepting arguments for the time/date/datetime values.
  • now() – creating an object for the current time/date/datetime values.

Here are a few examples. Creating objects with now:

LocalTime now = LocalTime.now();
LocalDate today = LocalDate.now();
LocalDateTime ldt = LocalDateTime.now();

The above would print respectively:

11:37:16.733
2017-10-28
2017-10-28T11:37:16.733

Similarly, you can parse the above values to create an object with the of() method like this:

LocalTime now = LocalTime.of(11,37,16);
LocalDate today = LocalDate.of(2017,10,28);
LocalDateTime ldt = LocalDateTime.of(2017,10,28,11,37);

This is good to know not only about your daily programming tasks but also about exams such as Oracle 1z0-808.

Liked it? Check also our other article How to parse time in Java.

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