java怎麽寫代碼才能保存從鍵盤輸入的用戶名和密碼

Scanner input = new Scanner(System.in);

System.out.println("請輸入用戶名：");

String username = input.next();

System.out.println("請輸入密碼：");

String password = input.next();

try {

FileWriter fw = new FileWriter("d:/text.txt", false);

BufferedWriter writer = new BufferedWriter(fw);

StringBuffer sb = new StringBuffer();

sb.append("用戶名：").append(username).append(" ").append("密碼：")

.append(password);

writer.write(sb.toString());

writer.close();

fw.close();

} catch (IOException e) {

// TODO Auto-generated catch block

e.printStackTrace();

}