使用TCP协议编写一个网络程序，设置服务器端的监听端口是8002，当与客户端建立连接后，服务器端向客户端发送数据“Hello,world”，客户端收到数据后打印输出。
public class tcp { public static void main(String[] args) { // TODO Auto-generated method stub try{ ServerSocket s = new ServerSocket(8002); while(true){ Socket s1 = s.accept(); OutputStream os = s1.getOutputStream(); DataOutputStream dis = new DataOutputStream(os); dis.writeUTF("Hello,wrold!"); dis.close(); s1.close(); } }catch(Exception e){ e.printStackTrace(); } } } public class tcpclient { public static void main(String[] args) { // TODO Auto-generated method stub try{ Socket s1 = new Socket("127.0.0.1", 8002); InputStream is = s1.getInputStream(); DataInputStream dos= new DataInputStream(is); System.out.println(dos.readUTF()); dos.close(); s1.close(); }catch(Exception e){ e.printStackTrace(); } } }