ADDITIONAL SYSTEM INFORMATION :
Windows 10

A DESCRIPTION OF THE PROBLEM :
I have a Swing app that uses the system look and feel. When I run it with the java command, it uses one font size, but when I run it with javaw it uses a smaller font.

REGRESSION : Last worked in version 8u202

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
Compile the test class and run on Windows with javaw and java

EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
The font size should be the same with java and with javaw
ACTUAL -
The font sizes look different. For java, the message displayed is "Font size: 13" but for javaw it's "Font size: 11"

---------- BEGIN SOURCE ----------
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
public class SwingTest{
public static void main(String[]args){
EventQueue.invokeLater(()->showFrame());
}
private static void showFrame(){
try{
UIManager.setLookAndFeel ( UIManager.getSystemLookAndFeelClassName() );
}catch(ClassNotFoundException|InstantiationException|IllegalAccessException|UnsupportedLookAndFeelException x){
System.err.println("Could not use system Look and Feel: "+x);
System.exit(99);
}
JFrame frame=new JFrame("SwingTest");
JLabel topLabel=new JLabel("SwingTest");
frame.addComponentListener(
new ComponentAdapter (){
@Override
public void componentShown(ComponentEvent e){
JOptionPane.showMessageDialog(null,"Font size: "+topLabel.getFont().getSize());
}
}
);
frame.add(topLabel,BorderLayout.NORTH);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.pack();
frame.setVisible(true);
}
}

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

FREQUENCY : always