How are the starting and ending times in Java calculate…

In Java, you can calculate the time difference between the start and end times using the following method:

1. The current system time.

long startTime = System.currentTimeMillis();
// 执行一些操作
long endTime = System.currentTimeMillis();

1. The current system time in nanoseconds.

long startTime = System.nanoTime();
// 执行一些操作
long endTime = System.nanoTime();

1. time in Java
2. The current date and time
3. Length of time

import java.time.Duration;
import java.time.LocalDateTime;

LocalDateTime startTime = LocalDateTime.now();
// 执行一些操作
LocalDateTime endTime = LocalDateTime.now();

Duration duration = Duration.between(startTime, endTime);
long durationInSeconds = duration.getSeconds();

It is important to note that these methods calculate the time difference from the starting time to the ending time. To calculate the execution time of a particular operation, subtract the starting time from the ending time to obtain the execution time of the operation.