Java: create temp file and replace with original

Question

i need some help with creating file

Im trying in the last hours to work with RandomAccessFile and try to achieve the next logic:

1. getting a file object

Answer 1

    try {
  // Create temp file.
  File temp = File.createTempFile("TempFileName", ".tmp", new File("/"));
  // Delete temp file when program exits.
  temp.deleteOnExit();
  // Write to temp file
  BufferedWriter out = new BufferedWriter(new FileWriter(temp));
  out.write("Some temp file content");
  out.close();
  // Original file
  File orig = new File("/orig.txt");
  // Copy the contents from temp to original file  
  FileChannel src = new FileInputStream(temp).getChannel();
  FileChannel dest = new FileOutputStream(orig).getChannel();
  dest.transferFrom(src, 0, src.size());

  } catch (IOException e) { // Handle exceptions here}