RadioButtons & JLabels not showing

[Jean-francois Le Bas]

hi

i created a component which extends a JDialog. It creates a JPanel (with a big size) inside a JScrollPane. Then i add RadioButtons and JLabels to the JPanel

two problems :
1 - the RadioButtons and JLabels don't show.
2 - the scrollBars of the JScrollPane don't show

here is my code :

public class xuggleJOptionPane1 extends JDialog{

    Container pane;
    JPanel paneMain;
    JLabel ms1;
    xuggleJOptionPane1 myFrame;
    JPanel panel;
    JScrollPane paneScroll;
    JPanel paneScrollpanel;

    public xuggleJOptionPane1(JFrame parent, String str, int nf)
    {
        super(parent, str);

        myFrame = this;
        myFrame.setPreferredSize(new Dimension(400, 160));
        myFrame.setSize(new Dimension(400, 160));

        panel = new JPanel();
        panel.setSize(400, 160);

        ms1 = new JLabel();

        paneScroll = new JScrollPane();

        paneScroll.setPreferredSize(new Dimension(380,100));

        paneScrollpanel = new JPanel();

        paneScrollpanel.setPreferredSize(new Dimension(1600, 1600));
        //if i add this line the whole paneScrollpanel disappears
        //paneScrollpanel.setSize(1600, 1600);

        String pl ="";
        if (nf != 1) pl = "es";
        String s1 = "We found " + nf + " flux"+pl+". Which one do you wanna choose ?";

        ms1.setText(s1);

        ArrayList<JRadioButton> Buttons = new ArrayList<JRadioButton>();
        ArrayList<JLabel> Labels = new ArrayList<JLabel>();

        ButtonGroup group = new ButtonGroup();
        for (int i = 0; i < nf; i++)
        {
            Buttons.add(new JRadioButton());
            Labels.add(new JLabel("test"));
            paneScrollpanel.add(Buttons.get(i));
            paneScrollpanel.add(Labels.get(i));
            group.add(Buttons.get(i));
        }
        Buttons.get(0).setSelected(true);

        paneScroll.add(paneScrollpanel);
        panel.add(ms1);
        panel.add(paneScroll);
        myFrame.add(panel);

        myFrame.setVisible(true);
        myFrame.setResizable(false);
    }


}

thanks for your help

[Campbell Ritchie]

You have some peculiar naming there. Classes should start with capital letters. You are using the name of an existing class (JOptionPane) as part of a class which appears not to extend it.
What on earth does myFrame = this; mean? That looks very very strange. You appear to be adding the dialog to itself.
What sort of layout are you applying to the component you are adding the radio buttons to?

[Darryl Burke]

You shouldn't add(...) the panel (or any other component) to the scroll pane. For the correct approach, read the API for JScrollPane and follow the link to the tutorial on How to Use Scroll Panes.

Also, learn to follow Java coding conventions. Class names should start with an uppercase letter; variable names with a lowercase letter. And BeForthrightWhenCrossPostingToOtherSites: http://stackoverflow.com/questions/11984457/why-arent-my-radiobuttons-jlabels-showing

[Campbell Ritchie]

And welcome to the Ranch

[Michael Dunn]

typical first-time poster - "I want an answer, and I want it now - bugger anyone wasting their time, not my problem"

I see you have your answer here
http://stackoverflow.com/questions/11984457/why-arent-my-radiobuttons-jlabels-showing

well, next time you have a problem, my thoughts will be "bugger you, I'm not wasting my time giving you a solution, not my problem".
i.e. what goes around, comes around.

[edit]
must be a time-delay lock here :-)

[Jean-francois Le Bas]

@Campbell Ritchie :

You have some peculiar naming there. Classes should start with capital letters.

okay i fixed this thanks for the notice. I will do this in the future now.

You are using the name of an existing class (JOptionPane) as part of a class which appears not to extend it.

it's just the name of the class. I called it that way because it look a little bit like a JOptionPane, nothing more

What on earth does myFrame = this; mean? That looks very very strange. You appear to be adding the dialog to itself.

it's just the same as typing simply: add(component) or this.add(component) but i prefer that way.

What sort of layout are you applying to the component you are adding the radio buttons to?

it's the standart layout the Flow Layout or do i have to specify a Layout?.

@Darryl Burke:

You shouldn't add(...) the panel (or any other component) to the scroll pane. For the correct approach, read the API for JScrollPane and follow the link to the tutorial on How to Use Scroll Panes.

okay so now i created the JScrollPane with passing the panel to the constructor but it's the same problem, nothing appears:

 paneScroll = new JScrollPane(paneScrollpanel);

typical first-time poster - "I want an answer, and I want it now - bugger anyone wasting their time, not my problem"

don't think that way
since yesterday i tried to make the damn RadioButtons appears and it's a long time when you're doing only this.
that's why i neeed help. I didn't pass 5 min on it without looking for an answer.
i tried with no Layouts at all and i could show the radiobuttons but only when i pass the mouse over (strange!)
i tried every combination possible and looked over dozens of questions

so please if you can get this thing working, let me know. If you don't know, no problem.

And welcome to the Ranch

thanks!

Jeff

[Jean-francois Le Bas]

okay so i found how to solve it

for people who are looking for an answer to the same question:

simply replace
paneScroll.add(paneScrollpanel);
with
paneScroll.setViewportView(paneScrollpanel);

and now everyting works! the labels are displayed, the buttons also and the big panel is finally scrollable!

i spent a lot of time looking for an answer but i never found this tip!