Java中Date类的toInstant()方法用于将Date对象转换为Instant对象。在转换过程中会创建一个Instant，用于表示时间轴上与此日期相同的点。
用法:
public Instant toInstant()
参数：该方法不带任何参数。
返回值：该方法返回一个Instant，表示与此时间在时间轴上的同一点。
以下程序说明了Java中toInstant()方法的用法：
示例1:
// Java code to demonstrate
// toInstant() method of Date class
import java.util.Date;
import java.util.Calendar;
import java.time.Instant;
public class GfG {
public static void main(String args[])
{
// Creating a Calendar object
Calendar c1 = Calendar.getInstance();
// Set Month
// MONTH starts with 0 i.e. ( 0 - Jan)
c1.set(Calendar.MONTH, 00);
// Set Date
c1.set(Calendar.DATE, 30);
// Set Year
c1.set(Calendar.YEAR, );
// Creating a date object
// with specified time.
Date dateOne = c1.getTime();
Instant inst = dateOne.toInstant();
System.out.println(
"Original Date: "
+ dateOne.toString());
System.out.println(
"Instant: " + inst);
}
}
输出：
Original Date: Wed Jan 30 06:01:46 UTC
Instant: -01-30T06:01:46.730Z
示例2:
// Java code to demonstrate
// clone() method of Date class
import java.util.Date;
import java.util.Calendar;
import java.time.Instant;
public class GfG {
public static void main(String args[])
{
// Creating a Calendar object
Calendar c1 = Calendar.getInstance();
// Set Month
// MONTH starts with 0 i.e. ( 0 - Jan)
c1.set(Calendar.MONTH, 06);
// Set Date
c1.set(Calendar.DATE, 12);
// Set Year
c1.set(Calendar.YEAR, 1996);
// Creating a date object
// with specified time.
Date dateOne = c1.getTime();
Instant inst = dateOne.toInstant();
System.out.println(
"Original Date: "
+ dateOne.toString());
System.out.println(
"Instant: " + inst);
}
}
输出：
Original Date: Fri Jul 12 06:01:49 UTC 1996
Instant: 1996-07-12T06:01:49.766Z
