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Hello i need to delete a specific line from text file after ID search p.g. ID=2

students.txt

1,Giannis,Oreos,Man
2,Maria,Karra,Woman
3,Maria,Oaka,Woman

And after search and delete to get:

students.txt

1,Giannis,Oreos,Man 
3,Maria,Oaka,Woman

But is not working properly

Code so far:

 @FXML
 TextField ID2;
 @FXML 
 public void UseDelete() throws IOException 
 File inputFile = new File("src/inware/students.txt");
 File tempFile = new File("src/inware/studentsTemp.txt");

 BufferedReader reader = new BufferedReader(new FileReader(inputFile));
 BufferedWriter writer = new BufferedWriter(new FileWriter(tempFile));

 String lineToRemove = ID2.getText();
 String currentLine;

 while ((currentLine = reader.readLine()) != null) 
 // trim newline when comparing with lineToRemove
 String trimmedLine = currentLine.trim();
 if (trimmedLine.equals(lineToRemove)) 
 continue;
 
 writer.write(currentLine + System.getProperty("line.separator"));
 
 writer.close();
 reader.close();
 boolean successful = tempFile.renameTo(inputFile);
 

If you want to remove a line by a line number I guess you can do a change to your code like this. You can give the int value of Id to the lineToRemove variable instead of my hard coded value

import java.io.*;

public class A 

 public static void main(String args) throws IOException 
 new A().useDelete();
 

 public void useDelete() throws IOException 
 File inputFile = new File("src/inware/students.txt");
 File tempFile = new File("src/inware/studentsTemp.txt");

 BufferedReader reader = new BufferedReader(new FileReader(inputFile));
 BufferedWriter writer = new BufferedWriter(new FileWriter(tempFile));

 int lineToRemove = 2;
 String currentLine;
 int count = 0;

 while ((currentLine = reader.readLine()) != null) 
 count++;
 if (count == lineToRemove) 
 continue;
 
 writer.write(currentLine + System.getProperty("line.separator"));
 
 writer.close();
 reader.close();
 inputFile.delete();
 tempFile.renameTo(inputFile);