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 leagues and cups.

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/league/basic?api_key=<YOUR_API_KEY>";

    // 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": [
    {
      "leagueId": "111",
      "name": "Ireland Premier Division",
      "shortName": "IRE PR",
      "type": 1,
      "subLeagueName": "League"
    },
    {
      "leagueId": "122",
      "name": "Argentine Division 1",
      "shortName": "ARG D1",
      "type": 1,
      "subLeagueName": "League"
    },
    {
      "leagueId": "133",
      "name": "Austrian Bundesliga",
      "shortName": "AUT D1",
      "type": 1,
      "subLeagueName": ""
    },
    {
      "leagueId": "144",
      "name": "Brazil Serie A",
      "shortName": "BRA D1",
      "type": 1,
      "subLeagueName": ""
    }
  ]
}