java 根据类名示例化类

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

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

  isAfter()方法在java.time包中可用。

• isAfter() method is used to check whether this Instant value comes after the given Instant (ins) value or not.

  isAfter()方法用于检查此Instant值是否在给定的Instant(ins)值之后。

• isAfter() 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.

  isAfter()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。

• isAfter() method may throw an exception at the time of checking the status.

  isAfter()方法在检查状态时可能会引发异常。

  NullPointerException: This exception may throw when the given parameter value is null.

  NullPointerException ：如果给定参数值为null，则可能引发此异常。

Syntax:

句法：

    public boolean isAfter(Instant ins);

Parameter(s):

参数：

• Instant ins – represents the Instant object to be compared with this Instant.

  Instant ins –表示要与此Instant进行比较的Instant对象。

Return value:

返回值：

The return type of this method is boolean, it returns true when this Instant value comes after the given Instant value otherwise it returns false.

此方法的返回类型为boolean ，当此Instant值在给定Instant值之后时，它返回true；否则返回false。

Example:

例：

// Java program to demonstrate the example 
// of boolean isAfter(Instant ins) method 
// of Instant

import java.time.*;

public class IsAfterOfInstant {
    
    public static void main(String args[]) {
    
        // Instantiates two Instant
        Instant ins1 = Instant.parse("2006-04-03T05:10:15.00Z");
        Instant ins2 = Instant.now();

        // Display ins1,ins2
        System.out.println("Instant ins1 and ins2: ");
        System.out.println("ins1: " + ins1);
        System.out.println("ins2: " + ins2);

        System.out.println();

        // Here, this method checks whether this
        // Instant (ins1) comes after the given
        // Instant (ins2) or not i.e. here it
        // returns false because ins1 comes before the
        // given ins2
        boolean status = ins1.isAfter(ins2);

        // Display status
        System.out.println("ins1.isAfter(ins2): " + status);

        // Here, this method checks whether this
        // Instant (ins2) comes after the given
        // Instant (ins1) or not i.e. here it
        // returns true because ins2 comes after the
        // given ins1
        status = ins2.isAfter(ins1);

        // Display status
        System.out.println("ins2.isAfter(ins1): " + status);
    }
}

Output

输出量

Instant ins1 and ins2: 
ins1: 2006-04-03T05:10:15Z
ins2: 2020-05-25T22:38:02.818372Z

ins1.isAfter(ins2): false
ins2.isAfter(ins1): true

翻译自: https://www.includehelp.com/java/instant-isafter-method-with-example.aspx

java 根据类名示例化类