getlong

即時(shí)類(lèi)getLong()方法 (Instant Class getLong() method)

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

  getLong()方法在java.time包中可用。

• getLong() method is used to get the value as long for the given temporal field from this Instant.

  getLong()方法用于從此Instant獲取給定時(shí)間字段的值。

• getLong() 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.

  getLong()方法是一個(gè)非靜態(tài)方法，只能通過(guò)類(lèi)對(duì)象訪(fǎng)問(wèn)，如果嘗試使用類(lèi)名稱(chēng)訪(fǎng)問(wèn)該方法，則會(huì)收到錯(cuò)誤消息。

• getLong() method may throw an exception at the time of returning value as long.

  只要返回值的時(shí)間長(zhǎng)， getLong()方法就可能引發(fā)異常。

  • DateTimeException: This exception may throw when the given field couldn't be generated.DateTimeException ：當(dāng)無(wú)法生成給定字段時(shí)，可能引發(fā)此異常。
  • UnsupportedTemporalTypeException: This exception may throw when the given field is unsupported.UnsupportedTemporalTypeException ：當(dāng)不支持給定字段時(shí)，可能引發(fā)此異常。
  • ArithmeticException: This exception may throw when the calculated result exceeds the limit.ArithmeticException ：當(dāng)計(jì)算結(jié)果超出限制時(shí)，可能引發(fā)此異常。

Syntax:

句法：

public long getLong(TemporalField t_field);

Parameter(s):

參數(shù)：

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

  TemporalField t_field –代表返回值的字段。

Return value:

返回值：

The return type of this method is long, it returns the value of the given field in a long from this Instant.

此方法的返回類(lèi)型是long ，它從此Instant返回long中給定字段的值。

Example:

例：

// Java program to demonstrate the example // of getLong(TemporalField t_field) method // of Instantimport java.time.*; import java.time.temporal.*;public class GetLongOfInstant {public static void main(String args[]) {// Instantiates two InstantInstant ins1 = Instant.parse("2006-04-03T05:10:15.20Z");Instant ins2 = Instant.parse("2007-06-05T10:20:30.20Z");// Display ins1,ins2System.out.println("Instant ins1 and ins2: ");System.out.println("ins1: " + ins1);System.out.println("ins2: " + ins2);System.out.println();// Here, this method gets the value of the // given field from this Instant i.e.// here the MICRO_OF_SECOND field value// will be returned from this Instant ins1// as longlong get_val = ins1.getLong(ChronoField.MICRO_OF_SECOND);// Display get_valSystem.out.println("ins1.getLong(ChronoField.MICRO_OF_SECOND): " + get_val);// Here, this method gets the value of the // given field from this Instant i.e.// here the MILLI_OF_SECOND field value// will be returned from this Instant ins2// as longget_val = ins2.getLong(ChronoField.MILLI_OF_SECOND);// Display get_valSystem.out.println("ins2.getLong(ChronoField.MILLI_OF_SECOND): " + get_val);} }

Output

輸出量

Instant ins1 and ins2: ins1: 2006-04-03T05:10:15.200Z ins2: 2007-06-05T10:20:30.200Zins1.getLong(ChronoField.MICRO_OF_SECOND): 200000 ins2.getLong(ChronoField.MILLI_OF_SECOND): 200

翻譯自: https://www.includehelp.com/java/instant-getlong-method-with-example.aspx

getlong

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