Nested Panels with SpringLayout

Question

I've been attempting to use nested JPanels, each with a SpringLayout. However, this seems to cause some very strange behaviour with component scrolling off the left edge of the window unless it's sized narrow. I've not used SpringLayout much, but I'm at a loss to explain it.
I have:
    protected void setUpGUI() {
        //set up layout
        SpringLayout theLayout=new SpringLayout();
        super.getContentPane().setLayout(theLayout);
        //add EntryPane
        super.getContentPane().add(theEntryPane);
        theLayout.putConstraint(SpringLayout.NORTH,theEntryPane,5,SpringLayout.NORTH,super.getContentPane());
        theLayout.putConstraint(SpringLayout.WEST,theEntryPane,5,SpringLayout.WEST,super.getContentPane());
        theLayout.putConstraint(SpringLayout.EAST,super.getContentPane(),5,SpringLayout.EAST,theEntryPane);
        //set up buttons
        storeButton=new JButton("Store");
        refreshButton=new JButton("Refresh");
        //add buttons
        super.getContentPane().add(storeButton);
        theLayout.putConstraint(SpringLayout.NORTH,storeButton,5,SpringLayout.SOUTH,theEntryPane);
        theLayout.putConstraint(SpringLayout.WEST,storeButton,5,SpringLayout.WEST,super.getContentPane());
        theLayout.putConstraint(SpringLayout.SOUTH,super.getContentPane(),5,SpringLayout.SOUTH,storeButton);
        super.getContentPane().add(refreshButton);
        theLayout.putConstraint(SpringLayout.NORTH,refreshButton,5,SpringLayout.SOUTH,theEntryPane);
        theLayout.putConstraint(SpringLayout.WEST,refreshButton,5,SpringLayout.EAST,storeButton);
        theLayout.putConstraint(SpringLayout.SOUTH,super.getContentPane(),5,SpringLayout.SOUTH,refreshButton);
    }In my subclass of JFrame, and 'theEntryPane' is a subclass of JPanel which includes the following:
    protected void addComponent(Component comp){
        add(comp);
        theLayout.putConstraint(SpringLayout.WEST,comp, 5,SpringLayout.WEST,this);
        theLayout.putConstraint(SpringLayout.EAST,this,5,SpringLayout.EAST,comp);
        if(lastComponent==null){
            theLayout.putConstraint(SpringLayout.NORTH,comp,5,SpringLayout.NORTH,this);
        } else {
            theLayout.putConstraint(SpringLayout.NORTH,comp,3,SpringLayout.SOUTH,lastComponent);
        lastComponent=comp;
    }My subclass of JFrame has a similar method that simply passes the component on to theEntryPane. When I run it and add the following components:
addComponent(new JLabel("Thing!"));
        addComponent(new JLabel("Thing!"));
        addComponent(new JLabel("Thing!"));The buttons at the bottom are off to the left, and only return when you make the window narrow. If I make my nested pane override getPreferredSize() to return Integer.MAX_VALUE for both dimensions, the buttons at the bottom (which are in a different container!) appear correctly but the top two labels in the nested frame suffer from the same problem.
Can anyone shed any light onto what's going on here? It appears that the nested layouts are somehow interfering with one another.

Answer 1

Found the error. Fixed now.