ADDITIONAL SYSTEM INFORMATION :
Windows 10, JDK 11.0.6
WQHD, 125% scaling

A DESCRIPTION OF THE PROBLEM :
Borders of Swing components are sometimed painted too thick with Windows-LAF on HiDPI screens with scaling > 100%. Recently there has been activity in Apache Netbeans to workaound this issue (see https://github.com/apache/netbeans/pull/1777).

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
- Start attached sample application
- Start resizing window
- In most windows sizes some borders of textfields are too thick

EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
Borders have always the same size
ACTUAL -
Some borders are painted to thick
See screenshots from the sample application: https://imgur.com/YRUdNIz and https://imgur.com/R03Y90h

---------- BEGIN SOURCE ----------
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JTextField;
import javax.swing.SwingUtilities;
import javax.swing.UIManager;
import javax.swing.UnsupportedLookAndFeelException;
import java.awt.FlowLayout;

public class HiDPITest {

    private void start() throws ClassNotFoundException, UnsupportedLookAndFeelException, InstantiationException, IllegalAccessException {

        UIManager.setLookAndFeel("com.sun.java.swing.plaf.windows.WindowsLookAndFeel");

        JFrame frame = new JFrame();

        JTextField tf1 = new JTextField();
        tf1.setColumns(20);
        JTextField tf2 = new JTextField();
        tf2.setColumns(20);
        JTextField tf3 = new JTextField();
        tf3.setColumns(20);
        JTextField tf4 = new JTextField();
        tf4.setColumns(20);

        JPanel p = new JPanel(new FlowLayout());
        p.add(tf1);
        p.add(tf2);
        p.add(tf3);
        p.add(tf4);

        frame.setContentPane(p);
        frame.setSize(200, 200);
        frame.setLocationRelativeTo(null);
        frame.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
        frame.setVisible(true);

    }

    public static void main(String[] args) {
        SwingUtilities.invokeLater(() -> {
            try {
                new HiDPITest().start();
            } catch (ClassNotFoundException | UnsupportedLookAndFeelException | InstantiationException | IllegalAccessException e) {
                e.printStackTrace();
            }
        });
    }
}

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

FREQUENCY : always