FULL PRODUCT VERSION :
java version "9"
Java(TM) SE Runtime Environment (build 9+181)
Java HotSpot(TM) 64-Bit Server VM (build 9+181, mixed mode)

ADDITIONAL OS VERSION INFORMATION :
Microsoft Windows [Version 6.1.7601]

EXTRA RELEVANT SYSTEM CONFIGURATION :
display scaling more than 100%

A DESCRIPTION OF THE PROBLEM :
Java 9 appears to no longer be high-dpi-aware on Windows.


REGRESSION.  Last worked in version 8u152

ADDITIONAL REGRESSION INFORMATION: 
Was working in some 9 early access releases, but I don't remember the last one I used.

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
Run on Windows 7 with display scaling (I'm using 170% scaling).

EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
Expect same approximate file chooser window and text size as for Java 8, and for icons to be rendered consistently.
ACTUAL -
File chooser and font size are scaled up under Java 9, and icons are rendered inconsistently due to OS image-like scaling.

REPRODUCIBILITY :
This bug can be reproduced always.

---------- BEGIN SOURCE ----------
import javax.swing.*;
import java.io.File;

public class DpiAwareBug {
   public static void main(String args[]) {
      SwingUtilities.invokeLater(
         new Runnable() {
            public void run() {
               JFileChooser fc = new JFileChooser();
               fc.showOpenDialog(null);
            }
         });
   }
}

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