Jav8:计算时间戳的运行时间

public class TimeMeasurement {
    public static void main(String[] args) {
        long startTime = System.currentTimeMillis();

        // 模拟一些操作
        try {
            Thread.sleep(1000); // 暂停1秒
        } catch (InterruptedException e) {
            e.printStackTrace();
        }

        long endTime = System.currentTimeMillis();
        long elapsedTime = endTime - startTime;

        System.out.println("运行时间: " + elapsedTime + "毫秒");
    }
}

import java.time.Instant;

public class TimeMeasurement {
    public static void main(String[] args) {
        Instant start = Instant.now();

        // 模拟一些操作
        try {
            Thread.sleep(1000); // 暂停1秒
        } catch (InterruptedException e) {
            e.printStackTrace();
        }

        Instant end = Instant.now();
        long elapsedTime = end.toEpochMilli() - start.toEpochMilli();

        System.out.println("运行时间: " + elapsedTime + "毫秒");
    }
}