swing JTable with ScrollBar - color of square between headers and track

<img src="https://i.stack.imgur.com/zNXXh.png" alt="enter image description here">

I have a JTable with BasicScrollBarUI, I set the headers background color: table.getTableHeader().setBackground(GuiConstants.backgroundColor);

and the scrolbar background color: public class ScrollBarUI extends BasicScrollBarUI {

@Override protected void paintTrack(Graphics g, JComponent c, Rectangle trackBounds) { c.setBackground(GuiConstants.backgroundColor); }


I still have a square between them that its color won't change. does anybody knows how to change it also to their color?



As shown in How to Use Scroll Panes: Providing Custom Decorations, you can use the scroll pane's setCorner() method to add a colored Component:

JPanel panel = new JPanel(); panel.setBackground(Color.gray); scrollPane.setCorner(JScrollPane.UPPER_RIGHT_CORNER, panel);

You may have to set the panel's opacity to true, and you may want to select a suitable color from the the current Look & Feel using the UIMnager.


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