JFrame with Dynamic JPanel

Question

I am doing a program and I need that a JFrame change their components according to one seleccion in a main JFrame, I tried to do so:

public void agregarPanelSegunPrueba(FrmBoleto frm)
{
    //this panel is a JPanel make with the graphical editor in netbeans
    PnlPruebaDCExesoVelocidad pnl = new PnlPruebaDCExesoVelocidad();
    pnl.repaint();
    pnl.revalidate();
    frm.getContentPane().remove(frm.getPnlPruebasDistanciaTiempo());
    frm.getContentPane().add(pnl);
    frm.pack();
    frm.setVisible(true);

}

somebody know which is wrong here. Thanks in advance.

Look into using a [`CardLayout`](http://docs.oracle.com/javase/tutorial/uiswing/layout/card.html) instead of adding an removing entire panels. You can see a simple example [here](http://stackoverflow.com/a/21460065/2587435) — Paul Samsotha, Mar 07 '14 at 12:20
I want to make the JPanel with netbeans editor without cardlayout. thanks — Premier, Mar 07 '14 at 12:23
It still looks like a good situation for a `CardLayout`. See [**this answer**](http://stackoverflow.com/a/21898439/2587435) for how to use `CardLayout` in the design view of Netbeans GUI Builder. — Paul Samsotha, Mar 07 '14 at 12:25

score 1 · Answer 1 · answered Mar 07 '14 at 12:39

1

You need to revalidate();repaint(); not JPanel which you add,but just container to that you add your panel.

You need to call:

frm.getContentPane().revalidate();
frm.getContentPane().repaint();

instead of :

pnl.repaint();
pnl.revalidate();

after that line: frm.getContentPane().add(pnl);

answered Mar 07 '14 at 12:39

alex2410

10,904
3
25
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does not work, but don't matter I going to use the cardlayout. thaks a lot – Premier Mar 07 '14 at 12:52
@Premier to call revalidate(); & repaint(); once time, as last code line, after all changes to Swing GUI are executed – mKorbel Mar 07 '14 at 13:17
@mKorbel seems that there other problem because `frm.pack();` solves revalidate problem – alex2410 Mar 07 '14 at 13:24
right [valid/only in the case that you don't want to change JFrames bounds, stays unchanged](http://stackoverflow.com/a/6989230/714968), and its contents can be schrinked – mKorbel Mar 07 '14 at 13:58

score 0 · Answer 2 · answered Mar 07 '14 at 12:13

0

public void agregarPanelSegunPrueba(FrmBoleto frm)
{
    //this panel is a JPanel make with the graphical editor in netbeans
    PnlPruebaDCExesoVelocidad pnl = new PnlPruebaDCExesoVelocidad();
    pnl.repaint();
    pnl.revalidate();
    frm.getContentPane().removeAll();
    frm.getContentPane().add(pnl);
    frm.pack();
    frm.setVisible(true);

}

answered Mar 07 '14 at 12:13

rpax

4,468
7
33
57

everything is fine until it has add the panel, finally the JFrame show me an empty window. – Premier Mar 07 '14 at 12:21

JFrame with Dynamic JPanel

2 Answers2