FULL PRODUCT VERSION :
java version "9.0.1"
Java(TM) SE Runtime Environment (build 9.0.1+11)
Java HotSpot(TM) 64-Bit Server VM (build 9.0.1+11, mixed mode)

ADDITIONAL OS VERSION INFORMATION :
Microsoft Windows [Version 6.1.7601]
OS X 10.12.6


A DESCRIPTION OF THE PROBLEM :
Using java.awt.Desktop.moveToTrash(File), on Windows I get a confirmation dialog: "Are you sure you want to move this file to the Recycle bin". On OS X there is no confirmation dialog. Ideally there should be none on either, as that should be optional and implemented in Java code if necessary.

From the source code I can also see that error messages will be displayed on Windows. Verifying deletion and displaying errors if necessary should also be left to the Java code.

In awt_Desktop.cpp Java_sun_awt_windows_WDesktopPeer_moveToTrash() function,
   fop.fFlags = FOF_ALLOWUNDO;
should be changed to
   fop.fFlags = FOF_ALLOWUNDO | FOF_NOCONFIRMATION | FOF_NOERRORUI;



STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
Compile and run code.

EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
Expect file to be deleted without prompting.
ACTUAL -
On Windows there is a "Are you sure you want to move this file to the Recycle bin" confirmation dialog.

On OS X there is no confirmation dialog.

REPRODUCIBILITY :
This bug can be reproduced always.

---------- BEGIN SOURCE ----------
import java.io.*;
import java.awt.Desktop;

public class MoveToTrashTest {
   public static void main(String[] args) throws IOException {
      File f = File.createTempFile("mttTest", "txt");
      Desktop.getDesktop().moveToTrash(f);
   }
}

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

CUSTOMER SUBMITTED WORKAROUND :
Use JNI to move files to trash on Windows.