For Left-to-right component orientation, SCROLL_TAB_LAYOUT policy works properly by displaying scrolling buttons for non-visible tabs. This is not the case for Right-to-left. The following program demonstrates this:

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import java.awt.*;
import javax.swing.*;

public class CompOrient extends JFrame {
    private JTabbedPane tab;

    public static void main(String[] args) {
        new CompOrient();
    }

    public CompOrient() {
        tab = new JTabbedPane();
        tab.setTabLayoutPolicy(JTabbedPane.SCROLL_TAB_LAYOUT);
        tab.setComponentOrientation(ComponentOrientation.RIGHT_TO_LEFT);
// tab.setComponentOrientation(ComponentOrientation.LEFT_TO_RIGHT);

        for(int i = 0; i < 10; i++) {
            JPanel panel = new JPanel();
            JButton button = new JButton("Button " + i);
            panel.add(button);
            tab.add("Tab " + i, panel);
        }

        getContentPane().add(tab);
        setSize(300, 300);
        show();
    }
}
     
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###@###.### 2002-12-03