java - 如何返回java文件中的行

Question

我需要从外部文件(java)将项目添加到组合框。我的问题是它只读取第一行，这是我的代码:

File Names_File = new File("Data" + File.separator + "C://Users//Hatem//Desktop//FichAdr.txt");
FileInputStream fis = null;
BufferedInputStream bis = null;
DataInputStream dis = null;

String str_Data = ""; //For storing the input from the file.

try
{
  fis = new FileInputStream("C://Users//Hatem//Desktop//FichAdr.txt");

  // Here BufferedInputStream is added for fast reading.
  bis = new BufferedInputStream(fis);
  dis = new DataInputStream(bis);


  str_Data = dis.readLine(); //Reading the line from the file.

  StringTokenizer st = new StringTokenizer(str_Data); //Tokenizing the line.

  //The below line adds only one item. The objective is adding all the items.

  //*** Requesting help here ***

  jComboBox1.addItem(st.nextToken("|"));

  //*** Requesting help here ***

  // Disposing and closing all the resources after using them.
  fis.close();
  bis.close();
  dis.close();
}

catch (FileNotFoundException e)
{
    System.err.println("Error: File not found!");
    JOptionPane.showMessageDialog(null, "Error: File not found!", "Error Message", JOptionPane.ERROR_MESSAGE);
}

catch (IOException e)
{
    System.err.println("Error: Unable to read from file!");
    JOptionPane.showMessageDialog(null, "Error: Unable to read from file!", "Error Message", JOptionPane.ERROR_MESSAGE);
}

我是编程新手，有人可以帮我解决这个问题吗？谢谢。

Answer 1

你应该使用像这样的循环:

while((str_data = dis.readLine()) != null){
         parse your line here
}

额外的括号提高了指令的优先级。