用metod JAVA读取大txt文件

try {
    BufferedReader reader = new BufferedReader(new FileReader("file.txt"));
    String line;
    while ((line = reader.readLine()) != null) {
        // 处理每一行的内容
    }
    reader.close();
} catch (IOException e) {
    e.printStackTrace();
}

try {
    Scanner scanner = new Scanner(new File("file.txt"));
    while (scanner.hasNextLine()) {
        String line = scanner.nextLine();
        // 处理每一行的内容
    }
    scanner.close();
} catch (FileNotFoundException e) {
    e.printStackTrace();
}

try {
    RandomAccessFile file = new RandomAccessFile("file.txt", "r");
    String line;
    while ((line = file.readLine()) != null) {
        // 处理每一行的内容
    }
    file.close();
} catch (IOException e) {
    e.printStackTrace();
}