When I try to rename “newfile” to “dump” it says it cannot change the file name. The file exists and it is able to be written to. I am trying to create a new folder where I write everything that I want kept into. What I want deleted stays out of the new file. Then the new file gets renamed to the old file and the old file gets deleted. Bacically I am deleting from a text file. Here is the code:

String name = "C:/Users/ajmer/OneDrive/Desktop/formation1/src/savedata.txt";
String name1= "C:/Users/ajmer/OneDrive/Desktop/formation1/src/temp.txt";
long count= Files.lines(Paths.get(name)).count();
Scanner scanner= new Scanner(System.in);
Scanner readlines = new Scanner(name);
FileWriter savedata = new FileWriter(name, true);
PrintWriter writer = new PrintWriter(savedata);
Homework homework1= new Homework("empty","2024-08-24" );
//LocalDate.now()
System.out.println("Enter the due date of the homework: YYYY-MM-DD");
homework1.dueDate= scanner.nextLine();
//LocalDate.parse
while(homework1.dueDate!="done"){
    writer.println(homework1.dueDate);
    break;
}
while(homework1.dueDate.equals("done")){
    try{
        File oldfile = new File(name);
        File newfile = new File(name1);
        int line=0;
        String currentline;
        FileWriter fw= new FileWriter(name1, true);
        BufferedWriter bw =new BufferedWriter(fw);
        PrintWriter pw= new PrintWriter(bw);
        FileReader fr= new FileReader(name);
        BufferedReader br = new BufferedReader(fr);
        while((currentline=br.readLine())!=null){
            line++;
            if((count)!=line){
                pw.println(currentline);
            }
        }
        pw.flush();
        pw.close();
        br.close();
        fw.close();
        bw.close();
        fr.close();
        oldfile.delete();
        File dump=new File(name);
        if (newfile.renameTo(dump)) {
            System.out.println("File renamed successfully.");
        } else {
            System.out.println("Error renaming the file.");
            System.out.println("Old file exists: " + oldfile.exists());
            System.out.println("New file exists: " + newfile.exists());
            System.out.println("Can write to old file: " + oldfile.canWrite());
            System.out.println("Can write to new file: " + newfile.canWrite());
        }
    }catch (IOException c){
        c.printStackTrace();
    }
    System.exit(0);
}

I tried deleting the temp.txt file hoping the file existing was the problem but nothing changed. I also tried using Files.move() but could not figure out what was making an error.

I was expecting that the text I want saved would go into the temp.txt file and the text I want deleted wouldnt. Then the original text file would be deleted. It never got typed into temp.txt and no file names were changed and no files were deleted.