Getting data from textfield into another class

[aborgeld]

I have a public frame and a public panel class, the panel class is called panel
In my panel class i do this:

public String getName()
    {
        String name = nameTextField.getText();
        return name;
    }

In the same class i can use this to display a name i fill in, it works fine.

Then i have a controller klasse where i wanna use this method to. So i test this really simple command:

Panel start = new Panel();
System.out.println(start.getName());

The output is and empty string. How can i get the data i put into a form textfield in another class? In the way i'm showing you. What did i forget?

Thanks!

Kind regards,

André

[j2me64]

a solution is to have a constructor in the controller class that take a refence of the public frame or of the type String. assuming that the controller class is instantiate before the public frame class, you can pass the reference by a call PublicFrameClass(this) or by PublicFrameClass(String).

[aborgeld]

Hi J2Me64,

My controller class is StartForm.
With a reference to my Panel.

Panel panel = new Panel();

In the Panel i call a controller for starting a game, so its not on forehand.
I call this controller class StartGame.


How do i set this reference?

 public StartGame(){
      StartForm(this);
  }

because this doens't work, i think i'm doing something wrong. Or i didn't fully understand.

Kind regards,

André

[Fubarable]

You need to have a reference to the Panel that is actually being displayed for that method to make any sense. You're creating a completely new Panel object in your controller and it has no relation to the displayed Panel object.

[milovan]

As Fubarable said

[B]YourPanelClass[/B] start = new [B]YourPanelClass[/B]();
System.out.println(start.getName());

[Fubarable]

As Fubarable said

[B]YourPanelClass[/B] start = new [B]YourPanelClass[/B]();
System.out.println(start.getName());

No, this not what I'm suggesting and is what the OP is already doing, so this won't help, I'm afraid. What the OP needs to do is to pass a reference to the currently visualized Panel object into the other class that needs to call its methods, that is the key here.

[milovan]

Sorry man, I just took a look at his code and didn't read his post so...

[aborgeld]

Thanks for your reply Fubarable. Your right i was making a new panel object.

I have solved it from the other side. Make and instance to the controller (handler) and fill it from the panel to the handler. This works fine.

But i'm very interested now.

So do you have and example of making an instance to the object thats already alive (visible). Like you said. Is this possible.

Kind regards,

André

[aborgeld]

Yeah Milovan,

I that is what i meant. This i didn't know. I think this is what Fubarable meant to.
Does this really work like this:

public StartGame(){
StartForm(myPanel);
}

Kind regards,

André

[aborgeld]

I tried the last option, this doesn't work:
But if anybody knows, i like to see an example of how you instantiate the object who's already alive (visible) and not a new one.

[milovan]

Check if this would help

class Example{
    JTextArea txt = new JTextArea(...);
    ....
    AnotherClass class = new AnotherClass(txt);
    ...
}

And another class that needs to use the same JTextArea

class AnotherClass{

    JTextArea txt;

    public AnotherClass(JTextArea newTxt){
        this.txt = newTxt;
        ...
        // do something with txt
    }
}

[aborgeld]

And the newTxt position you fill with the txtFld.getTxt option.
This is how i solved it.
Thanks for the reply's.