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java TCP client 從鍵盤讀入字串


BufferedReader inFromUser =
    new BufferedReader(new InputStreamReader(System.in));


inFromUser.readLine();


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java TCP client 從Server讀入字串


BufferedReader inFromServer =
    new BufferedReader(new InputStreamReader(client.getInputStream()));


inFromServer.readLine();


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java TCP client 送出字串給Server


DataOutputStream outToServer =
     new DataOutputStream(client.getOutputStream());
outToServer.writeBytes("string");


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java TCP 建立Client Socket


Socket client = new Socket("hostname",port);


--------


java TCP 建立Server Socket


ServerSocket waiting = new ServerSocket(port); //接應用WelcomeSocket


while(true){
   Socket server = waiting.accept();
   //其餘和 TCP Client 相同
}




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java UDP 建立Client Socket


DatagramSocket client = new DatagramSocket("hostname",port);


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java UDP 建立Server Socket


DatagramSocket server = new DatagramSocket(port);


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java UDP 傳送資料


InetAddress addr = InetAddress.getByName("destination");
int port=1234;


String a = "sendData";
bytes[] b= new bytes[1024];
b = a.getBytes();


DatagramPacket outPacket = new DatagramPacket(b,b.length,addr,port);
client.send(outPacket);
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java UDP 接收資料


byte b = new byte[1024];
DatagramPacket r = new DatagramPacket(b,b.length);


while(true){


     server.receive(r);
     int port = r.getPort();
     InetAddress addr = r.getAddress();
     String received = new String(r.getData());


}