Setting the title with a component extending from JDialog with a bidi string, I noticed that the orientation is either RTL or LTR depending what OS you are using. Shouldn't the orientation be the same? See picture attached.

Looking through the JDialog src, I noticed that the title is being passed straight into an awt Dialog. May this be the reason why the orientation of the bidi string is not correct or supported, but shouldn't it be since it's is a JDialog?

See test code below and picture attached.
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import java.awt.*;
import java.awt.event.*;
import javax.swing.*;


public class jDialogTest implements ActionListener {
    String title = "\u05d4\u05e6\u05d2\u05d4\u0020\u062a\u0628\u064a\u064a\u0646";
    JFrame frame;

    public jDialogTest() {
        frame = new JFrame(title);
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

        JButton showDialog = new JButton("Click here to see a dialog...");
        showDialog.addActionListener(this);
        showDialog.setActionCommand("show");
        frame.add(showDialog);
        frame.pack();
        frame.setVisible(true);
    }

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

    public void actionPerformed(ActionEvent e) {
        String command = ((JButton)e.getSource()).getActionCommand();

        if (command.equals("show")) {
            JOptionPane.showConfirmDialog(frame, "Testing title", title,
                                          JOptionPane.YES_NO_OPTION);
        }
    }
}