如何用Java检测Internet连接速度？

import java.io.IOException;
import java.net.URL;
import java.net.URLConnection;

public class InternetSpeedTest {
    public static void main(String[] args) {
        try {
            URL url = new URL("https://www.example.com"); // 替换为目标URL
            URLConnection connection = url.openConnection();
            long startTime = System.currentTimeMillis();
            connection.connect();
            long endTime = System.currentTimeMillis();
            long duration = endTime - startTime;
            double speed = (double) connection.getContentLength() / duration;
            System.out.println("连接速度：" + speed + " bytes/ms");
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}

import com.github.sheigutn.pushbullet.Pushbullet;
import com.github.sheigutn.pushbullet.items.push.sendable.file.PushbulletFile;
import com.github.sheigutn.pushbullet.items.push.sendable.file.PushbulletFilePush;
import com.github.sheigutn.pushbullet.items.push.sendable.file.PushbulletFilePushResponse;

import java.io.IOException;

public class InternetSpeedTest {
    public static void main(String[] args) {
        try {
            Pushbullet pushbullet = new Pushbullet("YOUR_API_KEY"); // 替换为你的Pushbullet API密钥
            PushbulletFilePushResponse response = pushbullet.pushFile(PushbulletFile.builder()
                    .withFileUrl("https://www.example.com") // 替换为目标URL
                    .build());
            double speed = response.getFile().getFileSize() / response.getUploadTime();
            System.out.println("连接速度：" + speed + " bytes/ms");
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}