Read/Write text file using selenium/java

There are certain scenarios where we need to read the content of a text file or write something to a text document.

Java gives a flexibility to read / write the contents(plain text) of a text file, even we can change the permission of text file using the code.

Let's see the implementation.

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 FileHandle1 {

public static void main(String[] args) throws IOException {
    File file = new File("test.txt");
    /*if (file.exists()) {
          file.delete();
    }
    file.createNewFile();*/
    
      //set to read only
     file.setReadOnly();
     System.out.println("Before. canWrite?" + file.canWrite());
     // set to writable 
     file.setWritable(true);
     System.out.println("After. canWrite?" + file.canWrite());
      
     //FileWriter f = new FileWriter(file,true); //append
     FileWriter f = new FileWriter(file);
     BufferedWriter b = new BufferedWriter(f);
     b.write("Sunil");
     b.newLine();
     //b.write("Sunil \n");// \n moves cursor to new line
     b.write("Kumar");
     b.flush();
     System.out.println("DOne");
      
     String str=null;
     FileReader fr = new FileReader(file);
     BufferedReader  br = new BufferedReader(fr);
     System.out.println(br.read());
     while((str=br.readLine())!=null)
     {
      System.out.println(br.readLine());
     }
 }
}