Use the new LocalDate class and LocalTime class in Java 11 to handle dates and times

Use the new LocalDate class and LocalTime class in Java 11 to handle dates and times

Introduction:
In Java 11, many new classes and methods suitable for date and time processing have been added . These include the LocalDate class and the LocalTime class, which are used to handle dates and times respectively. This article will introduce how to use these two classes to process dates and times, and attach corresponding code examples.

1. LocalDate class
LocalDate class is a class used to represent dates in the Java library. You can use it to represent a specific date, such as a birthday, meeting date, etc. Here are some common examples of using the LocalDate class:

1. Create a LocalDate object that represents the current date:

   LocalDate today = LocalDate.now();
   System.out.println("今天的日期是：" + today);

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2. Create a specific date:

   LocalDate specificDate = LocalDate.of(2022, 6, 30);
   System.out.println("特定的日期是：" + specificDate);

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3. Get the year, month and day of the date:

   int year = today.getYear();
   int month = today.getMonthValue();
   int day = today.getDayOfMonth();
   System.out.println("年份：" + year);
   System.out.println("月份：" + month);
   System.out.println("日期：" + day);

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4. Determine whether two dates are equal:

   LocalDate date1 = LocalDate.of(2022, 6, 30);
   LocalDate date2 = LocalDate.of(2022, 6, 30);
   
   if (date1.equals(date2)) {
    System.out.println("两个日期相等");
   } else {
    System.out.println("两个日期不相等");
   }

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2. LocalTime class
The LocalTime class is another new class in the Java library, used to represent time. You can use it to represent specific times of day, such as meeting times, office hours, etc. Here are some common examples of using the LocalTime class:

1. Creating a LocalTime object that represents the current time:

   LocalTime currentTime = LocalTime.now();
   System.out.println("当前时间是：" + currentTime);

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2. Creating a specific time:

   LocalTime specificTime = LocalTime.of(13, 30, 0);
   System.out.println("特定的时间是：" + specificTime);

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3. Get the hours, minutes and seconds of the time:

   int hour = currentTime.getHour();
   int minute = currentTime.getMinute();
   int second = currentTime.getSecond();
   System.out.println("小时：" + hour);
   System.out.println("分钟：" + minute);
   System.out.println("秒：" + second);

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4. Judge whether two times are equal:

   LocalTime time1 = LocalTime.of(13, 30, 0);
   LocalTime time2 = LocalTime.of(13, 30, 0);
   
   if (time1.equals(time2)) {
    System.out.println("两个时间相等");
   } else {
    System.out.println("两个时间不相等");
   }

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Summary:
Use the LocalDate class and LocalTime class in Java 11 to conveniently handle dates and times. By using these two classes, we can easily represent a specific date and time and perform various operations, such as getting the year, month, day, hour, minute, and second, and determining whether two dates or two times are equal. These features make working with dates and times easier and more intuitive.

It is worth noting that when using these classes, you can also perform other operations, such as adding and subtracting dates, formatting, etc. For more information on date and time handling operations, please refer to the official Java 11 documentation.

I hope this article will be helpful for you to learn and use date and time processing in Java 11. Good luck with your programming!

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