weather_forecast method implemented, api methods done

src/main/java/de/hs_mannheim/domain/System.java

@@ -57,11 +57,12 @@ public class System {
         return new String[1];
     }
 
-    public String current_weather() throws URISyntaxException, IOException, InterruptedException{
+    public String current_weather(){
         
-        String weather = "Fehler";
+        String weather = "";
         double temperature = 1; 
         
+        try{
         HttpClient http_client = HttpClient.newHttpClient();
         
         HttpRequest get_request = HttpRequest.newBuilder()
@@ -74,8 +75,9 @@ public class System {
         JSONObject json = new JSONObject(get_response.body());
         weather = json.getJSONArray("weather").getJSONObject(0).getString("description");
         temperature = json.getJSONObject("main").getDouble("temp");
+        } catch (Exception e){}
         
-        if(weather.equals("Fehler"))
+        if(weather.equals(""))
             return "Es ist ein Fehler aufgetreten!";
         else
             return weather + ": " + temperature + " °C";
@@ -83,7 +85,101 @@ public class System {
     }
 
     public String weather_forecast(String destination_zip){
-        return "";
+        
+        String weather_day_1 = "";
+        String weather_day_2 = "";
+        String weather_day_3 = "";
+
+        double temperature_day_1_1 = 1;
+        double temperature_day_1_2 = 1;
+        double temperature_day_1_3 = 1;
+        double temperature_day_1_4 = 1;
+
+        TreeSet<Double> temperature_day_1 = new TreeSet<>();
+        double temperature_day_1_high = 1;
+        double temperature_day_1_low = 1;
+
+        double temperature_day_2_1 = 1;
+        double temperature_day_2_2 = 1;
+        double temperature_day_2_3 = 1;
+        double temperature_day_2_4 = 1;
+
+        TreeSet<Double> temperature_day_2 = new TreeSet<>();
+        double temperature_day_2_high = 1;
+        double temperature_day_2_low = 1;
+
+        double temperature_day_3_1 = 1;
+        double temperature_day_3_2 = 1;
+        double temperature_day_3_3 = 1;
+        double temperature_day_3_4 = 1;
+
+        TreeSet<Double> temperature_day_3 = new TreeSet<>();
+        double temperature_day_3_high = 1;
+        double temperature_day_3_low = 1;
+
+
+        try{
+            HttpClient http_client = HttpClient.newHttpClient();
+            
+            HttpRequest get_request = HttpRequest.newBuilder()
+                                                .uri(new URI("https://api.openweathermap.org/data/2.5/forecast?zip="+destination_zip+",de&appid="+api_key+"&units=metric&lang=de)"))
+                                                .GET()
+                                                .build();
+            
+            HttpResponse get_response = http_client.send(get_request, BodyHandlers.ofString());
+    
+            JSONObject json = new JSONObject(get_response.body());
+            weather_day_1 = json.getJSONArray("list").getJSONObject(11).getJSONArray("weather").getJSONObject(0).getString("description");
+            weather_day_2 = json.getJSONArray("list").getJSONObject(19).getJSONArray("weather").getJSONObject(0).getString("description");
+            weather_day_3 = json.getJSONArray("list").getJSONObject(27).getJSONArray("weather").getJSONObject(0).getString("description");
+            
+            temperature_day_1_1 = json.getJSONArray("list").getJSONObject(8).getJSONObject("main").getDouble("temp");
+            temperature_day_1_2 = json.getJSONArray("list").getJSONObject(10).getJSONObject("main").getDouble("temp");
+            temperature_day_1_3 = json.getJSONArray("list").getJSONObject(12).getJSONObject("main").getDouble("temp");
+            temperature_day_1_4 = json.getJSONArray("list").getJSONObject(14).getJSONObject("main").getDouble("temp");
+        
+            temperature_day_2_1 = json.getJSONArray("list").getJSONObject(16).getJSONObject("main").getDouble("temp");
+            temperature_day_2_2 = json.getJSONArray("list").getJSONObject(18).getJSONObject("main").getDouble("temp");
+            temperature_day_2_3 = json.getJSONArray("list").getJSONObject(20).getJSONObject("main").getDouble("temp");
+            temperature_day_2_4 = json.getJSONArray("list").getJSONObject(22).getJSONObject("main").getDouble("temp");
+        
+            temperature_day_3_1 = json.getJSONArray("list").getJSONObject(24).getJSONObject("main").getDouble("temp");
+            temperature_day_3_2 = json.getJSONArray("list").getJSONObject(26).getJSONObject("main").getDouble("temp");
+            temperature_day_3_3 = json.getJSONArray("list").getJSONObject(28).getJSONObject("main").getDouble("temp");
+            temperature_day_3_4 = json.getJSONArray("list").getJSONObject(30).getJSONObject("main").getDouble("temp");
+        
+        } catch (Exception e){}
+        
+        temperature_day_1.add(temperature_day_1_1);
+        temperature_day_1.add(temperature_day_1_2);
+        temperature_day_1.add(temperature_day_1_3);
+        temperature_day_1.add(temperature_day_1_4);
+
+        temperature_day_1_high = (double) temperature_day_1.toArray()[temperature_day_1.size()-1];
+        temperature_day_1_low = (double) temperature_day_1.toArray()[0];
+
+        temperature_day_2.add(temperature_day_2_1);
+        temperature_day_2.add(temperature_day_2_2);
+        temperature_day_2.add(temperature_day_2_3);
+        temperature_day_2.add(temperature_day_2_4);
+
+        temperature_day_2_high = (double) temperature_day_2.toArray()[temperature_day_1.size()-1];
+        temperature_day_2_low = (double) temperature_day_2.toArray()[0];
+
+        temperature_day_3.add(temperature_day_3_1);
+        temperature_day_3.add(temperature_day_3_2);
+        temperature_day_3.add(temperature_day_3_3);
+        temperature_day_3.add(temperature_day_3_4);
+
+        temperature_day_3_high = (double) temperature_day_3.toArray()[temperature_day_1.size()-1];
+        temperature_day_3_low = (double) temperature_day_3.toArray()[0];
+
+        if(weather_day_1.equals("")||weather_day_2.equals("")||weather_day_3.equals(""))
+            return "Es ist ein Fehler aufgetreten!";
+        else
+            return "Morgen: " + weather_day_1 + ": Minimum: " + temperature_day_1_low + " °C" + "; Maximum: " + temperature_day_1_high + " °C\n"
+            + "Übermorgen: " + weather_day_2 + ": Minimum: " + temperature_day_2_low + " °C" + "; Maximum: " + temperature_day_2_high + " °C\n"
+            + "Überübermorgen: " + weather_day_3 + ": Minimum: " + temperature_day_3_low + " °C" + "; Maximum: " + temperature_day_3_high + " °C";
     }
 
     public String distance(String destination_zip){