File expenseFile = new File("src/FinalProject/expense.txt");
if(file.exists()){

					try{	FileWriter filewriter = new FileWriter("E:\\register.txt");
						BufferedWriter bf = new BufferedWriter(filewriter);
						bf.write(text_firstname.getText()+","+text_lastname.getText());
						bf.newLine();
						bf.close();
					}catch(Exception e){
						e.printStackTrace();
					}
				}