import org.json.JSONException; import org.json.JSONObject; public class HelloWorld { public static void main(String... args) { String json = "{\"screen_name\":\"katty0324\",\"age\":\"\"}"; JSONObject jsonObject = new JSONObject(json); Syst…

JavaのJSONObjectのgetIntとoptInt import org.json.JSONException; import org.json.JSONObject; public class HelloWorld { public static void main(String... args) { String json = "{\"screen_name\":\"katty0324\",\"age\":\"\"}"; JSONObject jsonOb…