网络IO-IO流的数据源

IO流的数据源

IO流的数据来源分别为四种硬盘、内存、键盘、网络

硬盘

public class TestDemo {
    public static void main(String[] args) {
        //磁盘IO
        try {
            FileInputStream fileInputStream =new FileInputStream("F:/test.txt");
        } catch (FileNotFoundException e) {
            e.printStackTrace();
        }
    }
}

内存

public class TestDemo02 {

    public static void main(String[] args) {

        //内存

        String str ="hello world";

        ByteArrayInputStream byteArrayInputStream =new ByteArrayInputStream(str.getBytes());

        int i = 0;

        while ((i = byteArrayInputStream.read()) != -1){

            System.out.print((char)i);

        }

    }

}

 

键盘

public class TestDemo03 {

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

        //键盘Scanner

        InputStream inputStream = System.in;

        int i = 0;

        while ((i = inputStream.read()) != -1){

            System.out.print((char)i);

        }

    }

}

 

网络

public class TestDemo04 {

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

        //网络IO

        Socket socket = new Socket();

        socket.getInputStream();

        socket.getOutputStream();

    }

}