Java的字节缓冲流与字符缓冲流解析

public class BufferedStreamDemo1 {
    public static void main(String[] args) throws IOException {

        BufferedInputStream bis = new BufferedInputStream(new FileInputStream("/Users/jessy/Desktop/offer50/aaa/aaa.txt"));
        BufferedOutputStream bos = new BufferedOutputStream(new FileOutputStream("/Users/jessy/Desktop/offer50/aaa/aaacopy.txt"));

        int b;
        while ((b = bis.read()) != -1) {
            bos.write(b);
        }
        
        bos.close();
        bis.close();
    }
}

public class BufferedStreamDemo2 {
    public static void main(String[] args) throws IOException {
        BufferedInputStream bis = new BufferedInputStream(new FileInputStream("/Users/jessy/Desktop/offer50/aaa/aaa.txt"));
        BufferedOutputStream bos = new BufferedOutputStream(new FileOutputStream("/Users/jessy/Desktop/offer50/aaa/aaacopy.txt"));

        byte[] bytes = new byte[1024];
        int len;
        while ((len = bis.read(bytes)) != -1) {
            bos.write(bytes, 0, len);
        }

        bos.close();
        bis.close();
    }
}

public class BufferedStreamDemo3 {
    public static void main(String[] args) throws IOException {
        BufferedReader br = new BufferedReader(new FileReader("/Users/jessy/Desktop/offer50/aaa/aaa.txt"));

        String line;
        while (((line = br.readLine()) != null)) {
            System.out.println(line);
        }

        br.close();
    }
}

public class BufferedStreamDemo4 {
    public static void main(String[] args) throws IOException {
        BufferedWriter bw = new BufferedWriter(new FileWriter("/Users/jessy/Desktop/offer50/aaa/b.txt", true));

        bw.write("朵朵是猫猫呀！！");
        //换行
        bw.newLine();

        bw.write("可是你不是猫猫！");
        bw.newLine();

        bw.close();
    }
}