java中get接口示例

LocalDateTime类的get()方法 (LocalDateTime Class get() method)

• get() method is available in java.time package.

  get()方法在java.time包中可用。

• get() method is used to get the value for the given field from this date-time object.

  get()方法用于从此日期时间对象获取给定字段的值。

• get() method is a non-static method, it is accessible with the class object only and if we try to access the method with the class name then we will get an error.

  get()方法是一个非静态方法，只能通过类对象访问，如果尝试使用类名称访问该方法，则会收到错误消息。

• get() method may throw an exception at the time of returning value for the given field.

  在返回给定字段的值时， get()方法可能会引发异常。

  • DateTimeException – This exception may throw when the given field couldn’t be generated.
  • UnsupportedTemporalTypeException – This exception may throw when the given field is unsupported.
  • ArithmeticException – This exception may throw when the calculated result exceeds the limit.

Syntax:

句法：

    public int get(TemporalField t_field);

Parameter(s):

参数：

• TemporalField t_field – represents the temporal field of the returned value.

  TemporalField t_field –表示返回值的时间字段。

Return value:

返回值：

The return type of this method is int, it returns the value for the given temporal field from this date-time.

此方法的返回类型为int ，它从该日期时间返回给定时间字段的值。

Example:

例：

// Java program to demonstrate the example
// of get(TemporalField t_field) method
// of LocalDateTime
import java.time.*;
import java.time.temporal.*;
public class GetOfLocalDateTime {public static void main(String args[]) {// Instantiates two LocalDateTime
LocalDateTime da_ti1 = LocalDateTime.parse("2005-10-05T10:10:10");
LocalDateTime da_ti2 = LocalDateTime.now();
// Display da_ti1, da_ti2
System.out.println("LocalDateTime da_ti1 and da_ti2: ");
System.out.println("da_ti1: " + da_ti1);
System.out.println("da_ti2: " + da_ti2);
System.out.println();
// Here, this method gets the value
// for the given field from this date-time
// i.e. we are getting the field value
// MONTH_OF_YEAR from this da_ti1
int get_val = da_ti1.get(ChronoField.MONTH_OF_YEAR);
// Display get_val
System.out.println("da_ti1.get(ChronoField.MONTH_OF_YEAR): " + get_val);
// Here, this method gets the value for the
// given field from this date-time
// i.e. we are getting the field value
// MICRO_OF_SECOND from this da_ti2
get_val = da_ti2.get(ChronoField.MICRO_OF_SECOND);
// Display get_val
System.out.println("da_ti2.get(ChronoField.MICRO_OF_SECOND): " + get_val);
}
}

Output

输出量

LocalDateTime da_ti1 and da_ti2:
da_ti1: 2005-10-05T10:10:10
da_ti2: 2020-06-05T02:20:56.040348da_ti1.get(ChronoField.MONTH_OF_YEAR): 10
da_ti2.get(ChronoField.MICRO_OF_SECOND): 40348

翻译自: https://www.includehelp.com/java/localdatetime-get-method-with-example.aspx

java中get接口示例