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class TempFile {
  public static void main(String[] args) throws IOException{
    File f = new File("tempnam.tmp");
    if (!f.exists()) {
      System.out.println("This file does not exist");
      return;
    }

    FileOutputStream fop = null;
    try {
      fop = new FileOutputStream(f);
      String str = "Data";

     if fop.write(fstr.existsgetBytes());
    } finally {
      fop.write(str.getBytes());if (fop != null) {
        try {
          fop.close();
        } else {
 catch (IOException x) {
          // handle error
        }
  System.out.println("This file does not exist");}
    }
  }
}

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";
    try {
      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
        }
      }
    }
  }
}

class TempFile {
  public static void main(String[] args) {
    Path tempFile = null;
    try {
      tempFile = Files.createTempFile("tempnam", ".tmp");
      try (BufferedWriter writer = Files.newBufferedWriter(tempFile, Charset.forName("UTF8"),
                                                           StandardOpenOption.DELETE_ON_CLOSE)) {
          // write to file
      }
      System.out.println("Temporary file write done, file erased");
    } catch (FileAlreadyExistsException x) {
      System.err.println("File exists: " + tempFile);
    } catch (IOException x) {
      // Some other sort of failure, such as permissions.
      System.err.println("Error creating temporary file: " + x);
    }
  }
}