Reading and Writing Text Files

input.txt

View input.txt

package com.readingwriting.file;

import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.File;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;
import org.openqa.selenium.By;
import org.openqa.selenium.WebDriver;
import utility.Helper;

public class TextFileDemo {

 public static void main(String[] args) {
  WebDriver driver = Helper.launchBrowser("chrome");
  driver.get("https://www.facebook.com/");
  
  //First Method Reading from a text File
  //Create a file input.txt inside your project
  //Enter some data inside this file
  try {
   File file = new File("input.txt");
   FileReader fr = new FileReader(file);
   char[] data = new char[(int) file.length()];
   fr.read(data);
   System.out.println(data);
   fr.close();
  } catch (IOException e) {
   e.printStackTrace();
  }
  
  //Second Method Reading from a text File
  //Create a file input.txt inside your project
  //Enter some data inside this file
  try {
   File file = new File("input.txt");
   FileReader fr = new FileReader(file);
   int value=0;
   while((value=fr.read())!=-1){
    System.out.println((char)value);
   }
   fr.close();
  } catch (IOException e) {
   e.printStackTrace();
  }
  
  //Third Method Reading from a text File
  //Create a file input.txt inside your project
  //Enter some data inside this file
  try {
   FileReader fr = new FileReader("input.txt");
   BufferedReader br = new BufferedReader(fr);
   
   String[] line = br.readLine().split(":");
   driver.findElement(By.id(line[2])).sendKeys(line[3]);
   
   line = br.readLine().split(":");
   driver.findElement(By.id(line[2])).sendKeys(line[3]);
   
   line = br.readLine().split(":");
   driver.findElement(By.id(line[2])).click();
   
   br.close();
   
  } catch (IOException e) {
   e.printStackTrace();
  }

  
  //First Writing into a file
  try {
   File file = new File("output.txt");
   if(!file.exists()){
    file.createNewFile();
   }
   
   FileWriter fw = new FileWriter(file);
   
   fw.write("google");
   fw.write("\n");
   fw.write("Facebook");
   fw.write("\n");
   
   fw.close();
  } catch (Exception e) {
   e.printStackTrace();
  }
  
  //Second Writing into a file
  try {
   File file = new File("output.txt");
   if(!file.exists()){
    file.createNewFile();
   } 
   //true it will append previous contents with existing contents
   //default is false if don't provide the second parameter
   FileWriter fw = new FileWriter(file, true);
   
   BufferedWriter bw = new BufferedWriter(fw);
   
   bw.write("google");
   bw.newLine();
   bw.write("Facebook");
   
   bw.close();
  } catch (Exception e) {
   e.printStackTrace();
  }  
 }
}