java 根据类名示例化类

即时类minusMillis()方法 (Instant Class minusMillis() method)

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

  minusMillis()方法在java.time包中可用。

• minusMillis() method is used to subtract the given duration in milliseconds from this Instant and returns the Instant.

  minusMillis()方法用于从此Instant减去给定的持续时间(以毫秒为单位)，并返回Instant。

• minusMillis() 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.

  minusMillis()方法是一种非静态方法，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。

• minusMillis() method may throw an exception at the time of performing subtraction.

  minusMillis()方法在执行减法时可能会引发异常。

  ArithmeticException: This exception may throw when the calculated result value exceeds the limit.

  ArithmeticException ：当计算结果值超过限制时，可能引发此异常。

Syntax:

句法：

public Instant minusMillis(long millis_val);

Parameter(s):

参数：

• long millis_val – represents the milliseconds to be subtracted from this Instant.

  long millis_val –表示要从此Instant减去的毫秒数。

Return value:

返回值：

The return type of this method is Instant, it returns the Instant that holds the value subtracted the given milliseconds from this Instant.

此方法的返回类型为Instant ，它返回Instant，该Instant保留从Instant减去给定毫秒数的值。

Example:

例：

// Java program to demonstrate the example // of minusMillis(long millis_val) method // of Instantimport java.time.*;public class MinusMillisOfInstant {
       public static void main(String args[]) {
           long millis = 20000;        // Instantiates two Instant        Instant ins1 = Instant.parse("2006-04-03T05:10:15.00Z");        Instant ins2 = Instant.now();        // Display ins1,ins2 and millis        System.out.println("Instant ins1 and ins2: ");        System.out.println("ins1: " + ins1);        System.out.println("ins2: " + ins2);        System.out.println("millis to substract: " + millis);        System.out.println();        // Here, this method subtracts the given duration        // in milliseconds from this Instant ins1         // i.e. here we are subtracting the given         // 20000 milliseconds from this ins1         Instant minus_millis = ins1.minusMillis(millis);        // Display minus_millis        System.out.println("ins1.minusMillis(millis): " + minus_millis);        // Here, this method subtracts the given duration        // in milliseconds from this Instant ins2         // i.e. here we are subtracting the given         // 20000 milliseconds from this ins2         minus_millis = ins2.minusMillis(millis);        // Display minus_millis        System.out.println("ins2.minusMillis(millis): " + minus_millis);    }}

Output

输出量

Instant ins1 and ins2: ins1: 2006-04-03T05:10:15Zins2: 2020-05-25T22:51:33.770318Zmillis to substract: 20000ins1.minusMillis(millis): 2006-04-03T05:09:55Zins2.minusMillis(millis): 2020-05-25T22:51:13.770318Z

翻译自:

java 根据类名示例化类