java tcp发送图片，为什么它总是报错：socket cannot be resolved to a type,该怎么处理

java tcp发送图片，为什么它总是报错：socket cannot be resolved to a type

Java code

public class tcpfasong {    Socket socket;    BufferedOutputStream os;        tcpfasong() throws SocketException,IOException        {    try{   InputStream in=new DataInputStream(new FileInputStream("C:\\Users\\Administrator\\Desktop\\fasong.jpg"));        socket=new Socket(InetAddress.getByName("localhost"),10000);    os=new BufferedOutputStream(new socket.getOutputStream());        int i;    byte []buf=new byte[60000];    while((i=in.read(buf))!=-1)    {        os.write(buf);    }    }catch(IOException e){System.out.print("1"+e);}    socket.close();    }    public static void main(String[] args) throws Exception {        // TODO Auto-generated method stub    new tcpfasong();    }}