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计算下一个日期 发布于:2024-06-08 16:06 11.5(课程类) 发布于:2024-06-07 19:05 11.2(P、S、E、F和S类) 发布于:2024-06-07 18:27 11.1(三角形类) 发布于:2024-06-07 18:25 10.5(显示素数因子) 发布于:2024-06-07 18:02 10.4(MyPoint类) 发布于:2024-06-07 17:50 10.3(MyInteger类) 发布于:2024-06-07 17:47 10.2(BMI类) 发布于:2024-06-07 17:32 10.1(时间类Time) 发布于:2024-06-07 17:12 7.3(计算数字的出现次数) 发布于:2024-06-07 16:34 7.2(倒置输入的数) 发布于:2024-06-07 16:10 7.1(指定等级) 发布于:2024-06-07 16:06 6.12(显示字符) 发布于:2024-06-07 15:45 6.11(计算酬金) 发布于:2024-06-07 13:23 6.10(使用isPrime方法) 发布于:2024-06-07 12:59 6.9(英尺与米之间的转换) 发布于:2024-06-07 12:44 6.8(摄氏度与华氏度之间的转换) 发布于:2024-06-07 00:07 6.7(财务应用程序) 发布于:2024-06-06 23:49 6.6(显示图案) 发布于:2024-06-06 23:26 6.5(对三个数排序) 发布于:2024-06-06 23:10 6.4(反向显示一个整数) 发布于:2024-06-06 23:02 6.3(回文整数) 发布于:2024-06-06 22:30 5.50(对大写字母计数) 发布于:2024-06-06 22:04 5.46(倒排一个字符串) 发布于:2024-06-06 22:00 5.33(完全数) 发布于:2024-06-06 21:55 5.27(显示闰年) 发布于:2024-06-06 21:51 5.10(能被5和6整除的数) 发布于:2024-06-06 21:03 5.8(找出最高分) 发布于:2024-06-06 20:57 5.7(财务应用程序) 发布于:2024-06-06 20:53 5.5(千克与磅之间的互换) 发布于:2024-06-06 20:40 5.4(英里转换为千米) 发布于:2024-06-06 20:02 3.17(游戏:剪刀石头布) 发布于:2024-06-06 18:28 3.12(回文数字) 发布于:2024-06-06 18:18 3.6(医疗应用程序:BMI) 发布于:2024-06-06 17:59 3.5(找到将来的日期) 发布于:2024-06-06 18:17 3.3(代数:求解2*2线性方程) 发布于:2024-06-06 17:02 2.12(物理:求出跑道长度) 发布于:2024-06-06 16:40 2.11(人口统计) 发布于:2024-06-06 16:29 2.10(科学:计算能量) 发布于:2024-06-06 16:18 2.9(物理:加速度) 发布于:2024-06-06 15:56 老逼登if work 发布于:2024-06-05 08:25 class Main { public static void main(String[] args) { //JSRUN引擎2.0,支持多达30种语言在线运行,全仿真在线交互输入输出。 // System.out.println("Hello world! - java.jsrun.net "); Integer retryCount = 12; String str = "00000"; str += retryCount; System.out.println("str:"+ str.substring(str.length()-6,str.length()) ); } } 发布于:2024-06-04 14:54 队列实现(数组迁移法) 发布于:2024-06-04 10:55 队列实现(头尾指针法) 发布于:2024-06-04 10:53 最长公共子序列,动态规划 发布于:2024-06-03 21:05 封装的入门 发布于:2024-06-03 21:15 # java test 一个java测试项目 发布于:2024-06-02 12:43 ThreadLocal用法 发布于:2024-05-30 17:01 枚举 实例 发布于:2024-05-29 09:48 Hello World 发布于:2024-05-29 08:59 [更多]
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Java Date Time Tutorials



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![java-date-time-tutorial-logo][] java-date-time-tutorial-logo

A collection of Java date and time examples.

1. Java Date Time APIs

In old days, we use the following classic Date and Calendar APIs to represent and manipulate date.

  • java.util.Date – date and time, print with default time-zone.
  • java.util.Calendar – date and time, more methods to manipulate date.
  • java.text.SimpleDateFormat – formatting (date -> text), parsing (text -> date) for date and calendar.

In Java 8, a new series of date and time APIs (JSR310 and inspired by Joda-time) are created in the new java.time package.

  • java.time.LocalDate – date without time, no time-zone.
  • java.time.LocalTime – time without date, no time-zone.
  • java.time.LocalDateTime – date and time, no time-zone.
  • java.time.ZonedDateTime – date and time, with time-zone.
  • java.time.DateTimeFormatter – formatting (date -> text), parsing (text -> date) for java.time
  • java.time.Instant – date and time for machine, seconds passed since the Unix epoch time (midnight of January 1, 1970 UTC)
  • java.time.Duration – Measures time in seconds and nanoseconds.
  • java.time.Period – Measures time in years, months and days.
  • java.time.TemporalAdjuster – Adjust date.

Note
Read Oracle article – Why do we need a new date and time library?

2. Java Date and Time Examples

List of the tutorials and updated with the new Java 8 java.time examples.

  1. Java Date and Calendar examples
  2. Java – How to compare dates
  3. Java – How to get current date time
  4. Java – How to get current timestamp
  5. Java – How to convert String to a Date
  6. Java – How to calculate elapsed time
  7. Java 8 – How to convert String to LocalDate
  8. Java 8 – How to format LocalDateTime
  9. Java 8 – Convert Instant to LocalDateTime
  10. Java 8 – Convert Instant to ZoneDateTime
  11. Java 8 – Convert Date to LocalDate and LocalDateTime
  12. Java 8 – ZonedDateTime examples
  13. Java – Convert date and time between timezone
  14. Java – Display all ZoneId and its UTC offset
  15. Java 8 – Duration and Period examples
  16. Java – How to add days to current date
  17. Java 8 – TemporalAdjusters examples
  18. Java 8 – MinguoDate examples (Taiwan calendar)
  19. Java 8 – HijrahDate, How to calculate the Ramadan date (Islamic calendar)

References

  1. Read Oracle article – Why do we need a new date and time library?
  2. Joda Time
  3. JSR 310: Date and Time API
  4. SimpleDateFormat JavaDoc
  5. DateTimeFormatter JavaDoc
  6. java.util.Date JavaDoc
  7. java.util.Calendar JavaDoc
  8. Read this – Java Date vs Calendar

[java-date-time-tutorial-logo]:

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