The long-awaited major upgrade to Flutter With
this upgrade, we have officially supported web, mobile, and desktop applications.
In Flutter2.0, in the basic part, you can use the same source code and release it to 5 OSs: native apps (iOS, Android), Windows, macOS, and Linux.
* It also includes the Web for browsers such as Chrome, Firefox, Safari, and Edge.
Flutter can also be incorporated into modules related to cars, TVs, and smart homes.
The Play Store alone already has over 150,000 Flutter apps, and customers around the world, including popular apps like Alibaba, Tencent, Baidu, WeChat, Grab, Yandex Go, Nubank, Sonos, Fastic, Betterment, and realtor.com, have Flutter. I'm using.

Over 1,000 Google engineers use Dart and Flutter to build apps.
Built with Flutter from these products such as Stadia, Google One, and Google Nest Hub.
Google Pay switched to Flutter as its flagship mobile app a few months ago, and it's already significantly improved in productivity and quality. By integrating the source code, the team eliminated functional differences between platforms and eliminated more than 500,000 lines of code.
Google Pay reports that it is much more efficient, significantly reduces technical debt, and has an integrated release process such as security reviews and experiments on both iOS and Android.

This initial release focuses specifically on three applications.

• PWA

• SPA

• Extending your existing Flutter mobile app to the web

Toyota, the world's best-selling carmaker, has announced plans to bring the best digital experience on the market to vehicles by building systems with Flutter.

🚙 The future of @Toyota's infotainment systems will be powered by Flutter.@ToyotaConnected is building Flutter right into the heart of their vehicles. Catch @danielthall at #FlutterEngage as he talks more about their plans with us!

On now 👉 https://t.co/T9025C5NCV pic.twitter.com/pSn299QF9P

— Flutter (@FlutterDev) March 3, 2021

$ dart fix --dry-run

$ dart fix --apply

/*::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::*/
/*::                                                                         :*/
/*::  This routine calculates the distance between two points (given the     :*/
/*::  latitude/longitude of those points). It is being used to calculate     :*/
/*::  the distance between two locations using GeoDataSource (TM) products   :*/
/*::                                                                         :*/
/*::  Definitions:                                                           :*/
/*::    Southern latitudes are negative, eastern longitudes are positive     :*/
/*::                                                                         :*/
/*::  Function parameters:                                                   :*/
/*::    lat1, lon1 = Latitude and Longitude of point 1 (in decimal degrees)  :*/
/*::    lat2, lon2 = Latitude and Longitude of point 2 (in decimal degrees)  :*/
/*::    unit = the unit you desire for results                               :*/
/*::           where: 'M' is statute miles (default)                         :*/
/*::                  'K' is kilometers                                      :*/
/*::                  'N' is nautical miles                                  :*/
/*::  Worldwide cities and other features databases with latitude longitude  :*/
/*::  are available at https://www.geodatasource.com                         :*/
/*::                                                                         :*/
/*::  For enquiries, please contact sales@geodatasource.com                  :*/
/*::                                                                         :*/
/*::  Official Web site: https://www.geodatasource.com                       :*/
/*::                                                                         :*/
/*::           GeoDataSource.com (C) All Rights Reserved 2019                :*/
/*::                                                                         :*/
/*::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::*/

import java.util.*;
import java.lang.*;
import java.io.*;

class DistanceCalculator
{
	public static void main (String[] args) throws java.lang.Exception
	{
		System.out.println(distance(32.9697, -96.80322, 29.46786, -98.53506, "M") + " Miles\n");
		System.out.println(distance(32.9697, -96.80322, 29.46786, -98.53506, "K") + " Kilometers\n");
		System.out.println(distance(32.9697, -96.80322, 29.46786, -98.53506, "N") + " Nautical Miles\n");
	}

	private static double distance(double lat1, double lon1, double lat2, double lon2, String unit) {
		if ((lat1 == lat2) && (lon1 == lon2)) {
			return 0;
		}
		else {
			double theta = lon1 - lon2;
			double dist = Math.sin(Math.toRadians(lat1)) * Math.sin(Math.toRadians(lat2)) + Math.cos(Math.toRadians(lat1)) * Math.cos(Math.toRadians(lat2)) * Math.cos(Math.toRadians(theta));
			dist = Math.acos(dist);
			dist = Math.toDegrees(dist);
			dist = dist * 60 * 1.1515;
			if (unit.equals("K")) {
				dist = dist * 1.609344;
			} else if (unit.equals("N")) {
				dist = dist * 0.8684;
			}
			return (dist);
		}
	}
}

The sample code is licensed under LGPLv3.