File Reader and File Writer

FileReader and FileWriter
This will helps you to understand the reading and writing concept of file.
Sample:

import java.io.BufferedReader;

import java.io.BufferedWriter;

import java.io.File;

import java.io.FileReader;

import java.io.FileWriter;

public class FileReaderAndWriter {

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

            String path = "D:/Hello.txt";

            File file = new File(path);

            writeFile(file, " Write this.", true);

            readFile(file);

      }

      public static void readFile(File file) throws Exception {

            FileReader fr = new FileReader(file);

            BufferedReader br = new BufferedReader(fr);

            String s = null;

            while ((s = br.readLine()) != null) {

                  System.out.println(s);

            }

            br.close();

            fr.close();

      }

     

      public static void writeFile(File file, String text, boolean append) throws Exception {

            FileWriter fw = new FileWriter(file, append);

            BufferedWriter bw = new BufferedWriter(fw);

            bw.write(text);

            bw.close();

            fw.close();

      }    

}