Styjun

I m working cucumber with java automation framework , there one directory has one text file which I coded like (Every time it is renaming ) , I want to pick up that new renaming file and after opening that file I want to update some particular data and save it for further code.

Can anyone help me how can I open text file , How can I update and close it again,
want to update particular data (see example below)(There has Name column and Value in second raw , want to update Name data every time with any random string)
Text file data :

Name | DOB | Gender |
Komal | 5-6-1992 | Female

You can't update existing file using Java.

1. You have to read, modify and write to a new file.


2. Delete the old file


3. Rename the new file with old file name.

Below program would replace 4th Column data (Komal) with desired string and We need to pass directory name which would have 1 txt file.

public class MyApplication 

 public static void main(String[] args) throws Exception 
 getTxtFileWithInADirectory("D:\Learning\newyork");
 

 static void getTxtFileWithInADirectory(String directoryPath) 
 String fileExtension;
 File folder = new File(directoryPath);
 File[] listOfFiles = folder.listFiles();
 for (int i = 0; i < listOfFiles.length; i++) 
 if (listOfFiles[i].isFile()) 
 fileExtension = listOfFiles[i].getName().substring(listOfFiles[i].getName().lastIndexOf("."), listOfFiles[i].getName().length()); 
 if(fileExtension.contains(".txt")) 
 updateTXTFile(listOfFiles[i].getAbsolutePath(),"Poonam");
 
 else 
 System.out.println(".txt file not found");
 
 
 

 static void updateTXTFile(String fileToBeModified, String newText) 
 String oldContent = "";
 BufferedReader reader = null;
 FileWriter writer = null;
 try
 ");
 String newContent = oldContent.replace(items[3], " "+newText+" ");
 writer = new FileWriter(fileToBeModified);
 writer.write(newContent);
 catch (Exception e)
 
 e.printStackTrace();
 
 finally
 
 try
 
 //Closing the resources
 reader.close();
 writer.close();
 
 catch (Exception e) 
 
 e.printStackTrace();