import com.google.gson.*;

class TestObjectToJson {
  
    
  
    public static void main(String[] args) {
         int data1 = 100;
        
        String s="hoi";
        Gson gson = new Gson();
  String test=data1 + "+++ " + s;
        //convert java object to JSON format
        String json = gson.toJson(s);
        String json1 = gson.toJson(data1);
        String json2 = gson.toJson(test);
        System.out.println(json);
        System.out.println(json1);
        System.out.println(json2.replace("+"," "));

        


    }
  
  }