java - How can I call my class gui_Game from Main via button's action listener? -

when clicked button named "start", i'd launch class in gui_game. in gui_game set title , there have 3 button.

this code in main class:

private class start implements actionlistener{         public void actionperformed(actionevent e) {             jbutton b = (jbutton) e.getsource();             if (b.gettext().equals("start"))                 // want add here         }     } 

this gui_game source:

    public class gui_game extends jframe{         private jbutton button;        private jbutton button1;        private jbutton button2;        private jbutton button3;        private jbutton button4;        private jbutton button5;        private jbutton button6;        private jbutton button7;        private jbutton button8;        private jlabel stage;         public gui_game() throws ioexception         {           // .. code ..        }         public static void main(string[] args) throws ioexception        {           gui_game main = new gui_game();           main.setvisible(true);        }     } 

in gui_game, creates new window , 3 buttons.