private void btnLoginActionPerformed(java.awt.event.ActionEvent evt) {

        String sUsername = tfUser.getText();
        String sPassword = pfPass.getText();
        boolean ValidLogin = false;

        try (Scanner file = new Scanner(new File("LoginDetails.txt"))) {
            while (file.hasNext()) {
                String next = file.nextLine();
                String[] arr = next.split("/");
                if (arr[0].equals(sUsername && arr[1].equals(sPassword)) {
                        this.setVisible(false);

            }else {
                    ValidLogin = false;
                }
            }
            }


        } catch (Exception e) {
            JOptionPane.showMessageDialog(this, "Incorrect Username or Password");
        }
        if (ValidLogin== true) {
                                this.setVisible(false);
                    new GameScreen().setVisible(true);
        }
    }