Java程序从Instant减少到几秒和十亿分之一秒
让我们首先设置一个Instant：
Instant now = Instant.ofEpochMilli(184142540078l);
现在让我们减去Instant的秒数：
Instant resSeconds = now.minusSeconds(50);
现在让我们减去Instant的十亿分之一秒：
Instant resNanoSeconds = now.minusNanos(10000);
示例
import java.time.Instant;
public class Demo {
public static void main(String[] args) {
Instant now = Instant.ofEpochMilli(184142540078l);
System.out.println(now);
Instant resSeconds = now.minusSeconds(50);
System.out.println("After subtracting seconds = "+resSeconds);
Instant resNanoSeconds = now.minusNanos(10000);
System.out.println("After subtracting nanoseconds = "+resNanoSeconds);
}
}输出结果
1975-11-02T06:42:20.078Z After subtracting seconds = 1975-11-02T06:41:30.078Z After subtracting nanoseconds = 1975-11-02T06:42:20.077990Z