FULL PRODUCT VERSION :
java version "1.8.0-ea"
Java(TM) SE Runtime Environment (build 1.8.0-ea-b121)
Java HotSpot(TM) 64-Bit Server VM (build 25.0-b63, mixed mode)

ADDITIONAL OS VERSION INFORMATION :
Darwin mankell 13.0.2 Darwin Kernel Version 13.0.2: Sun Sep 29 19:38:57 PDT 2013; root:xnu-2422.75.4~1/RELEASE_X86_64 x86_64

EXTRA RELEVANT SYSTEM CONFIGURATION :
Retina display

A DESCRIPTION OF THE PROBLEM :
Checkmarks of JCheckBoxMenuItems aren't rendered in high res on Retina displays.

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
Create a JFrame with a menu and a selected JCheckBoxMenuItem.

EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
The checkmark should be rendered in high resolution/HiDPI, just like the all other components.
ACTUAL -
The checkmark is quite "pixely", rendered in low resolution.

REPRODUCIBILITY :
This bug can be reproduced always.

---------- BEGIN SOURCE ----------
import javax.swing.*;

public class HiDPIJCheckBoxMenuItem {

    public static void main(String[] args) {
        final JFrame frame = new JFrame();
        final JMenuBar bar = new JMenuBar();
        final JMenu menu = new JMenu("Menu");
        final JCheckBoxMenuItem checkBoxMenuItem = new JCheckBoxMenuItem("JCheckBoxMenuItem");
        checkBoxMenuItem.setSelected(true);
        menu.add(checkBoxMenuItem);
        bar.add(menu);
        frame.setJMenuBar(bar);

        SwingUtilities.invokeLater(new Runnable() {
            @Override
            public void run() {
                frame.setBounds(100, 100, 100, 100);
                frame.setVisible(true);
            }
        });
    }
}

---------- END SOURCE ----------