DYNAMIC HANDLING IN FILE SYSTEM IN JAVA WITH EXAMPLE

Dynamic handling of file system :

It is a concept provided in java which is used for

Creating a new file in a file system

Writing data into a file

Reading data from a file

To do the same in java we have 5 predefined classes

File

FileReader

BufferedReader

FileWriter

BufferedWriter

Demonstration of file reading :

import java.io.BufferedReader;

import java.io.BufferedWriter;

import java.io.File;

import java.io.FileReader;

import java.io.FileWriter;

import java.io.IOException;

public class aaaaaaaaaaa {

        public static void main(String[] args) throws IOException {

                File f=new File("f:\\javafile.txt");

                f.createNewFile(); // new file will be created

        FileWriter fw=new FileWriter("f:\\javafile.txt");

                BufferedWriter bw=new BufferedWriter(fw);

        bw.write("hai go to f drive and check me ");

        bw.newLine();

                bw.write(" hai !!! i am here..");

                bw.flush();

                FileReader fr =new FileReader("f:\\javafile.txt");

                BufferedReader br=new BufferedReader(fr);

                boolean var=br.ready();

                System.out.println(var);

                while (br.ready())

                {

                        String s = br.readLine();

                        System.out.println(s);

                       

                }

               

                                } 

        }