如何从文本文件中连续读取数据-Java

我一直在尝试将数据从命令提示符写入JTextArea，但它不适合我，所以我尝试将数据写入文本文件。到目前为止，它只写一行，然后停止，所以我需要不断地从文本文件中读取，直到停止为止。这是我的密码：`

try {
        File consoleLog = new File("tempConsole.txt");    
        Process p = Runtime.getRuntime().exec("cmd /c minecraft.lnk");
        //writes the text from the console to tempConsole.txt
        BufferedReader input = new BufferedReader (new InputStreamReader(p.getInputStream()));
        BufferedWriter consoleOutputWriter = new BufferedWriter(new FileWriter("tempConsole.txt"));
        consoleOutputWriter.write("" + input);
        consoleOutputWriter.newLine();
        //reads the tempConsole.txt
        BufferedReader consoleOutputReader = new BufferedReader (new FileReader("tempConsole.txt"));
        //writes the tempConsole.txt to the on-sceen JTextArea.
        String outputFromTemp = consoleOutputReader.readLine(); 
        console.setText(outputFromTemp);
        consoleOutputWriter.close();
    } catch (Exception ex) {`

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感谢您的帮助，我已经在大脑和互联网上搜索了几个小时，但运气不好：//

您应该先使用BufferedReader的readLine（）方法获取输入。现在这一行是consoleOutputWriter.write（“+input”）；使用“toString（）”，这肯定是行不通的。

BufferedReader in = new BufferedReader(new FileReader(fileName))


String line2;
while ((line2 = in.readLine()) != null) {
//do something
}