java 將字符串存到txt 並讀取操做

//寫入txt文件
try {
      String encryptData = 「helloWorld」
   //寫入指定文件中
            BufferedWriter bw = new BufferedWriter(new FileWriter("src/text/data.txt"));
            bw.write(encryptData);
            bw.close();
        } catch (IOException ex) {
            Logger.getLogger(EncryptTest.class.getName()).log(Level.SEVERE, null, ex);
        }

//從txt文件中讀取數據
try {
            BufferedReader br = new BufferedReader(new FileReader("src/text/data.txt"));
            String demo = br.readLine();
            System.out.println("讀取txt文件數據：" + demo);
          
            br.close();
        } catch (IOException ex) {
            Logger.getLogger(EncryptTest.class.getName()).log(Level.SEVERE, null, ex);
        }