Java FileOutputStream getFD() Method

The getFD() method of Java FileOutputStream class is used to get the FileDescriptor associated with this stream.

Syntax

Parameter

Return Value

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

Exception

IOException - If any I/O error occurs.

Example 1

Java Program to get the File Descriptor.

import java.io.*;
import java.util.Scanner;
public class FiOutputGetfd1 {
    public static void main(String[] args) {
        // TODO Auto-generated method stub
        File file= null;
        FileInputStream fin=null;
        FileOutputStream fout=null;
        Scanner sc;
        try {
            //creating a txt file.
            file= new File("./JavaTpoint.txt");
            file.createNewFile();
            System.out.println("Enter a string to get the File Descriptor ------>");
            sc= new Scanner (System.in);
            //taking a string from the user  and convert it into char Array
           char[] s= sc.nextLine().toCharArray();
            // write a string into the txt file.
            fout= new FileOutputStream(file);
            for(int i=0; i<s.length;i++)
            {
                fout.write(s[i]);
            }
            // reading a data from the txt file
             fin= new FileInputStream(file);
             int read ;
             System.out.print("String that is stored in the JavaTpoint Txt file ------>");
             while((read=fin.read())!=-1)
             {
                 System.out.print((char)read);
             }
              System.out.println();
              System.out.println();
             // get file descriptor
             System.out.println("file descriptor is ---->"+fout.getFD());
               fout.close();    
             fin.close();
            }
        catch(Exception e)
        {
        System.out.println(e);    
        }}}

Output:

Enter a string to get the File Descriptor ------>
ashu
String that is stored in the JavaTpoint Txt file ------>ashu
file descriptor is ---->java.io.FileDescriptor@43a25848

Example 2

Java Program to get the File Descriptor.

import java.io.*;
import java.util.Scanner;
public class FiOutputGetfd2 {
public static void main(String[] args) {
        // TODO Auto-generated method stub
        File file= null;
        FileOutputStream fout=null;
        Scanner sc;
        try {
            //creating a txt file.
            file= new File("./JavaTpoint.txt");
            file.createNewFile();
            System.out.println("Enter a string to get the File Descriptor ------>");
            sc= new Scanner (System.in);
            //taking a string from the user  and convert it into char Array
           char[] s= sc.nextLine().toCharArray();
            // write a string into the txt file.
            fout= new FileOutputStream(file);
            for(int i=0; i<s.length;i++)
            {
                fout.write(s[i]);
            }
              System.out.println();
              System.out.println();
             // get file descriptor
             System.out.println("file descriptor is ---->"+fout.getFD());
               fout.close();    
            }
        catch(Exception e)
        {
        System.out.println(e);    
        }}}

Output:

Enter a string to get the File Descriptor ------>
Sasasda

file descriptor is ---->java.io.FileDescriptor@43a25848.

Next TopicJava FileOutputStream Class

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