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class TempFile {
  public static void main(String[] args) throws IOException{
    File f = File.createTempFile("tempnam",".tmp");
    FileOutputStream fop = null;
    try {
      fop = new FileOutputStream(f);
      String str = "Data";
      fop.write(str.getBytes());
      fop.flush();
    } finally {
      // Stream/file still open; file will
      // not be deleted on Windows systems
      f.deleteOnExit(); // Delete the file when the JVM terminates

      if (fop != null) {
        try {
          fop.close();
        } catch (IOException x) {
          // Handle error
        }
      }
    }
  }
}