java - resizable layout swing when disappears JPanel

Question

I have many jPanel (panelF) that are added in other jPanel(panelB). jPanelF contain jPanelC.

I have set the layout to add them as follows:

    PanelB.setLayout(new BoxLayout(this.PanelB, BoxLayout.PAGE_AXIS));
    PanelF panelF1 = new PanelF(); 
    PanelB.add(panelF1);
    PanelF panelF2 = new PanelF(); 
    PanelB.add(panelF2);

I set visible false in jPanelC1. But JPanelF2 preserves distance and not want to make that blank space

What I want is that when disappearing JPanelC1. Distance is maintained between the jPanelF and not be a white space. I tried validate() and change the layout but I fail. What would be the way? Thank you very much. Sorry for my English

know if there are something like $("#panelC1").fadeOut("slow")? would be ideal.

Answer 1

Invoking panelC1.setVisible(false) makes panelC1 invisible, but it doesn't change the geometry defined by the get[Preferred|Maximum|Minimum]Size methods. You can

• Override the defining methods, as shown in How to Use BoxLayout: Specifying Component Sizes.

• Remove panelC1 from the enclosing panelF1, as shown here, and restore it when it is again visible.

• Use a layout other than Box.