Share the sample code using the interface call of iSports Api Sports Data www.isportsapi.com. This API endpoint returns the basic information of football schedule and results.

import java.io.BufferedReader;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.URL;

public class SportDemo {
  public static void main(String[] args) {
    // Set url parameter
    String url = "http://api.isportsapi.com/sport/football/schedule/basic?api_key=%3CYOUR_API_KEY%3E&leagueId=1639";

    // Call iSport Api to get data in json format
    String charset = "UTF-8";
    String jsonResult = get(url, charset);

        System.out.println(jsonResult);
  }

  /**
   * @param url
   * @param charset
   * @return return json string
   */
  public static String get(String url, String charset) {
    BufferedReader reader = null;
    String result = null;
    StringBuffer sbf = new StringBuffer();
    String userAgent = "Mozilla/5.0 (Windows NT 6.1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/29.0.1547.66 Safari/537.36";
    try {
      URL newUrl = new URL(url);
      HttpURLConnection connection = (HttpURLConnection)newUrl.openConnection();
      connection.setRequestMethod("GET");
      connection.setReadTimeout(30000);
      connection.setConnectTimeout(30000);
      connection.setRequestProperty("User-agent", userAgent);
      connection.connect();
      InputStream is = connection.getInputStream();
      reader = new BufferedReader(new InputStreamReader(is, charset));
      String strRead = null;
      while ((strRead = reader.readLine()) != null) {
        sbf.append(strRead);
        sbf.append("\r\n");
      }
      reader.close();
      result = sbf.toString();
    } catch (Exception e) {
      e.printStackTrace();
    }
    return result;
  }
}

The football API returns the data as follows:

{
  "code": 0,
  "message": "success",
  "data": [
    {
      "matchId": "231035710",
      "leagueId": "122",
      "leagueType": 1,
      "leagueName": "Argentine Division 1",
      "leagueShortName": "ARG D1",
      "matchTime": 1564244100,
      "status": -1,
      "homeName": "Colon de Santa Fe",
      "awayName": "Patronato Parana",
      "homeScore": 0,
      "awayScore": 1,
      "explain": "",
      "extraExplain": {
        "kickOff": 0,
        "minute": 0,
        "homeScore": 0,
        "awayScore": 0,
        "extraTimeStatus": 0,
        "extraHomeScore": 0,
        "extraAwayScore": 0,
        "penHomeScore": 0,
        "penAwayScore": 0,
        "twoRoundsHomeScore": 0,
        "twoRoundsAwayScore": 0,
        "winner": 0
      },
      "neutral": false
    },
    {
      "matchId": "121035719",
      "leagueId": "122",
      "leagueType": 1,
      "leagueName": "Argentine Division 1",
      "leagueShortName": "ARG D1",
      "matchTime": 1564252200,
      "status": -1,
      "homeName": "San Lorenzo",
      "awayName": "Godoy Cruz Antonio Tomba",
      "homeScore": 3,
      "awayScore": 2,
      "explain": "",
      "extraExplain": {
        "kickOff": 0,
        "minute": 0,
        "homeScore": 0,
        "awayScore": 0,
        "extraTimeStatus": 0,
        "extraHomeScore": 0,
        "extraAwayScore": 0,
        "penHomeScore": 0,
        "penAwayScore": 0,
        "twoRoundsHomeScore": 0,
        "twoRoundsAwayScore": 0,
        "winner": 0
      },
      "neutral": false
    }
  ]
}