🚀 go-pugleaf

As I have not quite understood your answer here is  a simplyfied example and
perhaps you could tll me how to handle it::


public class A {
  public A(){

    // ...
  }
  public void methodOneOfA (){
  /... <manipulates i in one way>
  };
  public void methodTwoOfA (){
  /... <manipulates i in another way>
  };
  int i;
}

Now I would like to manipulate A:
1. way (command line method):

public class mainprog {
  public mainprog() {
  }
  public static void main(String[] args) {
          testobj  = new A();
          testobj.methodOneOfA();
          testobj.methodTwoOfA();
  }
 A testobj;
}

As everything worked well, I would like to get the two methods as a result
of pressing seperate buttons in a swing-application.
Up to now I did it the following way:
class ButtonPanel  extends JPanel  implements ActionListener  {
  public ButtonPanel() {
      FirstButton = new JButton("method1");
      SecondButton = new JButton("method2");

      add(FirstButton);
      add(SecondButton);

      FirstButton.addActionListener(this);
      SecondButton.addActionListener(this);
     testobj =  new A();
 }
 public void actionPerformed (ActionEvent evt)
 {
     Object source = evt.getSource();
     if (source == FirstButton)
       testobj.methodOneOfA();
     else if (source == SecondButton)        testobj.methodTwoOfA();
   }

 }
  private A testObj;
}

public class ButtonFrame extends JFrame {
  public ButtonFrame() {
    setSize(350,200);
    addWindowListener(new WindowAdapter(){
      public void windowClosing(WindowEvent e){
        System.exit(0);
      }});
    Container contentPane = getContentPane();
    contentPane.add(new ButtonPanel());
  }
}
public class mainprog {
  public mainprog() {
  }
  public static void main(String[] args) {

          JFrame frame  = new ButtonFrame();
          frame.show();
  }
}



But I don't know if putting the main Obj in the class ButtonPanel. Perhaps
it would be better to put it anywhere else, isn't it?

OK?

Thomas



"Alexey N. Solofnenko" <trelony@mail.ru> schrieb im Newsbeitrag
news:427650ba$1@newsgroups.borland.com...
> If I understood your question correctly.... I usually add method
> initWith(SomeObject obj) method that I call just after a form is created.
>
> - Alexey.
>
> Thomas Arend wrote:
> > I have once again one of these questions dealing with the professional
usage
> > of the advices of school-books about java.
> > So here it is:
> > I try to implement an application, that in the whole manipulates a
certain
> > class A. That means every action in the gui is to manipulate a central
> > object OA.
> > I have implemented the manipulation of the object OA in an apllication
that
> > can to be used on the command-line.
> >
> > Now I would like to use swing-components. And here the problem comes up:
In
> > which class (extended from a Swing component) do I now create the
central
> > object?
> > Is it the "main" part, where I normally would only create the Jframe an
call
> > "frame.show"; is it in the JFrame-constructor or is it in the content
> > Pane in the JPanel, where I also implement the Buttons, menues and so
on?
> >
> > And how do I make the central object known to all components of the GUI
> > (in other words: Where do I implement the call of the methods of  the
class
> > to manipulate the object for example after pressing a Button?)
> >
> > A long question, but as I said: My books only tell me where it is
posible,
> > but not what is best.
> >
> > Thanks
> > Thomas
> >
> >
> >