JODA Primitives: Introduction to the basic framework in the Java class library

JODA Primitives: Introduction to the basic framework in the Java class library In Java development, the processing date and time are a common demand.However, there are some problems with the design of Java's native date and time library (such as java.util.date and java.util.calendar), including the problems of variability, unsafe threads, and ease of use.To solve these problems, a excellent third-party library JODA-TIME was created. Joda-Time is a Java class library that provides comprehensive support for date and time.It is based on the ISO calendar system, which contains many powerful functions and easy -to -use APIs, allowing developers to easily handle the date and time -related operations. However, JODA-TIME is not limited to the date and time of processing. It also provides a basic framework called Joda Primitives.Joda Primitives provides more efficient and reliable operations for Java developers by introducing new original types. Some commonly used JODA Primitor include: 1. LocalDate: It is used to represent the type that only contains the date, there is no concept of time and time zone.It can be used to deal with conditions that do not require specific time such as birthdays and anniversary. LocalDate localDate = new LocalDate(2022, 5, 1); System.out.println (localdate.getdyofweek ()); // Output: Sunday 2. LocalTime: It is used to represent the type that only includes time, no date and time zone concept.It can be used to handle a specific time of the day, such as the execution time of the planned task. LocalTime localTime = new LocalTime(8, 30); System.out.println (localTime.getHourofday ()); // Output: 8 3. LocalDateTime: It is used to represent the type of date and time, without the concept of time zone.It can be used to deal with scenes that need to be accurate to seconds. LocalDateTime localDateTime = new LocalDateTime(2022, 5, 1, 8, 30); System.out.println (localdateTime.getSecondofminute ()); // Outlet: 0: 0 4. Duration: It is used to indicate the duration between two time points, in milliseconds.Can be used for calculation time difference, such as calculating program running time. DateTime start = new DateTime(2022, 5, 1, 8, 0); DateTime end = new DateTime(2022, 5, 1, 9, 30); Duration duration = new Duration(start, end); System.out.println (duration.getstandardminutes ()); // Output: 90 5. Period: It is used to represent the interval between two dates, and calculate the year, month, day and other units.Can be used to calculate the life cycle, age, etc. LocalDate birthdate = new LocalDate(1990, 1, 1); LocalDate today = new LocalDate(); Period period = new Period(birthdate, today); System.out.println (Period.getyears ()); // Output: 32 By using Joda Primitor, developers can easily handle the operation of the date and time related to avoid some problems when using the Java native library.At the same time, Joda Primitives also provides some convenient methods and tools for conversion, formatting and comparison date and time. To sum up, Joda Primitives is the basic framework in the Joda-Time class library, which provides some new original types for processing date and time-related operations.Whether it is daily development or complex date calculation, Joda Primitives provides developers with convenient, efficient and reliable solutions.