The AWT FileDialog's ComboBox is rendered incorrectly under Windows 7 in HiDPI mode. This seems to work correctly, under Windows 8 and 10.

As the dialog is "native", could this be a bug in Windows 7? If so, it's probably beyond repair and http://mail.openjdk.java.net/pipermail/awt-dev/2016-March/010778.html (re-implementation as "Common Item Dialog") should perhaps be considered seriously, at least for Java 9.

To reproduce, run the following code on Windows 7 with a HiDPI display and open the ComboBox/DropDownList at the center/top of the dialog. You'd expect a properly rendered list, but the lines overlap (see attached screenshot).

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

public class FileDialogBug {

    public static void main(final String[] args) throws AWTException {
        SwingUtilities.invokeLater(() -> {
            final JFrame frame = new JFrame();
            frame.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
            frame.setVisible(true);
            final FileDialog fileDialog = new FileDialog(frame);
            fileDialog.setVisible(true);
        });
    }
}