Right margin ? and JSrollBar question

Question

To keep my components from being too close to the edge on the left hand side of my app, i use:
container.add(Box.createRigidArea(new Dimension(5,0)));
My question is how i can acheive the same 5 pixel wide margin on the right handside of my container. If i do 'newDimension(5, (getWidth() - 5))' will this be respected as the component is enlarged or is there a better way ?
Secondly i have 2 JScrollBars (each with a JTable) in a splitPane, the horizontal scroll bar outline always shows but never with the blue bar part. Here is the relevant code:
JScrollPane s1 = new JScrollPane(getTableA());
JScrollPane s2 = new JScrollPane(getTableB());
    JSplitPane spl = new JSplitPane(JSplitPane.VERTICAL_SPLIT,s1, s2);
    s1.setHorizontalScrollBarPolicy(JScrollPane.HORIZONTAL_SCROLLBAR_ALWAYS);
    s1.setVerticalScrollBarPolicy(JScrollPane.VERTICAL_SCROLLBAR_AS_NEEDED);
    s2.setHorizontalScrollBarPolicy(JScrollPane.HORIZONTAL_SCROLLBAR_ALWAYS);     s2.setVerticalScrollBarPolicy(JScrollPane.VERTICAL_SCROLLBAR_AS_NEEDED); 
void set(Container pane){
pane.setLayout(new BoxLayout(pane, BoxLayout.Y_AXIS));
//returns the split pane above
pane.add(getSpl());
}Thanks for the help

Answer 1

Regarding the margin, it appears i can't apply this to a container. Is there another way ?Borders are only for Swing components so you would at the Border to the panel you added to the content pane.
if the table doesn't resize to the size of the application it looks very bad indeedIf the table resizes to the size of the application then there is no need for horizontal scrollbars.