class - JAVA FX: Can I access objects instantiated in main from any controller? -


the reason asking find out if can hold authentication details in class instantiated in main , reference them in various controllers?

public class identity(){     public string userid = null; }  public class main extends application(){     identity identity = new identity;     identity.userid = 123;     //can access controller now?     //i think when instantiate object in new controller      //userid again null reference correct? }

u can use singlton design pattern.

    class app {      private static app app;     private identity identity;      private app() {     }      public static app app() {         if (app == null)             app = new app();         return app;     }       public void setidentity(identity identity) {         this.identity = identity;     }      public identity getidentity() {         return identity;     }      class identity {         public string userid = null;          public void setuserid(string userid) {             this.userid = userid;         }          public string getuserid() {             return userid;         }     } }     import static app.*;  public class yourcontroller {     app().getidentity(); }      import static app.*; public class main extends application(){     identity identity = new identity;     identity.userid = 123;     app().setidentiry(identity);  }

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