static Jisuanqi frm=new Jisuanqi(); static Button btn1=new Button("加"); static Button btn2=new Button("-"); static Button btn3=new Button("*"); static Button btn4=new Button("/"); static Button btn5=new Button("退出"); static Button btn6=new Button("清零"); static Label lab1 =new Label("操作数1"); static Label lab2 =new Label("操作数2"); static Label lab3 =new Label("计算结果");