TCP与UDP客户服务端实现大小写及SOCKET编程实现聊天程序.docVIP

TCP实现大小写转换代码如下 import java.io.*; import .*; class TCPServer{ public static void main(String argv[]) throws Exception { String ClientSentence; String capitalizedSentence; @SuppressWarnings(resource) ServerSocket welcomeSocket = new ServerSocket(8998); while(true){ Socket connectionSocket = welcomeSocket.accept(); BufferedReader infromClient = new BufferedReader(new InputStreamReader( connectionSocket.getInputStream())); DataOutputStream outToClient = new DataOutputStream( connectionSocket.getOutputStream()); ClientSentence = infromClient. readLine(); capitalizedSentence = ClientSentence.toUpperCase() + \n; outToClient.writeBytes(capitalizedSentence); } } } ?TCP服务器代码： ? import java.io.*; import .*; class TCPClient{ public static void main(String argv[]) throws Exception { String sentence; String modifiedSentence; BufferedReader infromUser = new BufferedReader( new InputStreamReader(System.in)); Socket clientSocket = new Socket(,8998); DataOutputStream outToServer = new DataOutputStream( clientSocket.getOutputStream()); BufferedReader infromServer = new BufferedReader(new InputStreamReader( clientSocket.getInputStream())); sentence = infromUser.readLine(); outToServer.writeBytes(sentence + \n); modifiedSentence = infromServer.readLine(); System.out.println(FROM SERVER:+ modifiedSentence); clientSocket.close(); } } 运行结果截图: UDP实现大小写转换 UDPServer短代码： import .*; import java.io.*; public class Server { public static void main(String args[])throws SocketException,IOException{ DatagramSocket socket; DatagramPacket packet; byte[] buf = new byte[256]; int port; InetAddress add; socket = new DatagramSocket(8888); packet = new Datagra