Java.io.RandomAccessFile.getFD() Method

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Description

The java.io.RandomAccessFile.getFD() method returns the opaque file descriptor object associated with this stream.

Declaration

Following is the declaration for java.io.RandomAccessFile.getFD() method

public final FileDescriptor getFD()

Parameters

  • NA

Return Value

This method returns the file descriptor object associated with this stream.

Exception

  • IOException -- if an I/O error occurs.

Example

The following example shows the usage of java.io.RandomAccessFile.getFD() method.

package com.tutorialspoint;

import java.io.*;

public class RandomAccessFileDemo {

   public static void main(String[] args) {
      try {
         // create a new RandomAccessFile with filename test
         RandomAccessFile raf = new RandomAccessFile("c:/test.txt", "rw");

         // write something in the file
         raf.writeUTF("Hello World");

         // set the file pointer at 0 position
         raf.seek(0);

         // read and print the contents of the file
         System.out.println("" + raf.readUTF());

         // return the file descriptor of the stream
         System.out.println("" + raf.getFD());

         // close the strea and release resources
         raf.close();
      } catch (IOException ex) {
         ex.printStackTrace();
      }


   }
}

Assuming we have a text file c:/test.txt, which has the following content. This file will be used as an input for our example program:

ABCDE  

Let us compile and run the above program, this will produce the following result:

Hello World
java.io.FileDescriptor@152b6651



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