字符缓冲输入流

public static void main(String[] args) throws IOException {
        // 字符缓冲输入流
        BufferedReader br = new BufferedReader(new FileReader("D:\\a.txt"));

        // 读取数据
        char[] chars = new char[1024];
        int len;

        while ((len = br.read(chars)) != -1){
            System.out.print(new String(chars, 0, len));
        }

        br.close();
    }