Writing to a file via CreateRestrictedFile/

Writing to a file fails if the file does not already exist on Windows - not an issue on Linux. Here is the stack trace of the error I get when writing preferences to a non-existent file:

at com.sun.proxy.$Proxy7.saveFileDialog(Unknown Source)
at net.sourceforge.jnlp.services.ServiceUtil$PrivilegedHandler.invoke(ServiceUtil.java:206)
at java.security.AccessController.doPrivileged(Native Method)
at net.sourceforge.jnlp.services.ServiceUtil$PrivilegedHandler$1.run(ServiceUtil.java:201)
at java.lang.reflect.Method.invoke(Method.java:498)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at net.sourceforge.jnlp.services.XFileSaveService.saveFileDialog(XFileSaveService.java:70)
at net.sourceforge.jnlp.services.XFileSaveService.writeToFile(XFileSaveService.java:120)
at net.adoptopenjdk.icedteaweb.io.FileUtils.createRestrictedFile(FileUtils.java:182)
at net.adoptopenjdk.icedteaweb.io.FileUtils.createRestrictedFile(FileUtils.java:345)
**java.io.IOException: Cannot rename C:\Temp\ppp.temp to C:\Temp\ppp**

One workaround is to create an empty text file first then write to it - the file MUST exist for it to be written to. This is not ideal.

Upon close inspection/debugging I found in method writeTofile in class XFileSaveService.class:

/**

Writes actual file to disk.
*/
private void writeToFile(InputStream stream, File file) throws IOException {
**if (!file.createNewFile())** { //file exists boolean replace = (JOptionPane.showConfirmDialog(null, file.getAbsolutePath() + " already exists.\n" + "Do you want to replace it?", "Warning - File Exists", JOptionPane.YES_NO_OPTION) == 0); if (!replace) return; }
else

{ RestrictedFileUtils.createRestrictedFile(file); }
if (file.canWrite())

{ FileOutputStream out = new FileOutputStream(file); byte[] b = new byte[256]; int read = 0; while ((read = stream.read(b)) > 0) out.write(b, 0, read); out.flush(); out.close(); }
else

{ throw new IOException("Unable to open file for writing"); }
}
}
This method uses !file.createNewFile() in an if to check if the file exists - this causes a file to be created such that when a rename attempt is made the file already exists so can not be created. A rewrite of the open source code is being attempted as a way to remedy this issue.

Is this an actual problem - has anyone else experienced this on Windows (or even linux). I took a copy of the writeToFile method and replaced the (!file.createNewFile()) with file.exists() and this sorted the problem out.

Please enlighten me.

Thanks,
Shinal