Java中的 LocalTime minusNanos() 方法及示例

LocalTime类的minusNanos()方法用于从此 LocalTime 中减去指定的纳秒值，并将结果作为 LocalTime 对象返回。这个瞬间是不变的。计算在午夜左右结束。

句法：

public LocalTime minusNanos(long nanosecondsToSubtract)

参数：此方法接受单个参数nanosecondsToSubtract ，它是要减去的纳秒值，它可以是负值。

返回值：此方法返回基于此时间减去纳秒的LocalTime 。

下面的程序说明了 minusNanos() 方法：

方案一：

// Java program to demonstrate
// LocalTime.minusNanos() method
  
import java.time.*;
  
public class GFG {
    public static void main(String[] args)
    {
  
        // create a LocalTime object
        LocalTime time
            = LocalTime.parse("19:34:50.63");
  
        // print LocalTime
        System.out.println("LocalTime before subtraction: "
                           + time);
  
        // subtract 34000000 nanoseconds using minusNanos()
        LocalTime value = time.minusNanos(34000000);
  
        // print result
        System.out.println("LocalTime after subtraction: "
                           + value);
    }
}

输出：

LocalTime before subtraction: 19:34:50.630
LocalTime after subtraction: 19:34:50.596

方案二：

// Java program to demonstrate
// LocalTime.minusNanos() method
  
import java.time.*;
  
public class GFG {
    public static void main(String[] args)
    {
  
        // create a LocalTime object
        LocalTime time
            = LocalTime.parse("01:00:01");
  
        // print LocalTime
        System.out.println("LocalTime before subtraction: "
                           + time);
  
        // subtract 971200000 nanoseconds  using minusNanos()
        LocalTime value = time.minusNanos(971200000);
  
        // print result
        System.out.println("LocalTime after subtraction: "
                           + value);
    }
}

输出：

LocalTime before subtraction: 01:00:01
LocalTime after subtraction: 01:00:00.028800

参考资料： https: Java/time/LocalTime.html#minusNanos(long)