adding java Networking

Author: cratesium

javaNetworking/GreetingClient.class

@@ -0,0 +1,19 @@
+
+
+import java.net.*;
+import java.io.*;
+public class GreetingClient {
+   public static void main(String [] args) {
+      String serverName = args[0];
+      int port = Integer.parseInt(args[1]);
+      try {      System.out.println("Connecting to " + serverName + " on port " + port);
+         Socket client = new Socket(serverName, port);      
+         System.out.println("Just connected to " + client.getRemoteSocketAddress());
+         OutputStream outToServer = client.getOutputStream();
+         DataOutputStream out = new DataOutputStream(outToServer);        
+         out.writeUTF("Hello from " + client.getLocalSocketAddress());
+         InputStream inFromServer = client.getInputStream();
+         DataInputStream in = new DataInputStream(inFromServer);       
+         System.out.println("Server says " + in.readUTF());
+         client.close();
+      } catch (IOException e) {         e.printStackTrace();      }   }	}

javaNetworking/GreetingClient.java

@@ -0,0 +1,34 @@
+import java.net.*;
+import java.io.*;
+public class GreetingServer extends Thread {
+   private ServerSocket serverSocket; 
+   public GreetingServer(int port) throws IOException {
+      serverSocket = new ServerSocket(port);
+      serverSocket.setSoTimeout(10000);   }
+   public void run() {
+      while(true) {        try {
+            System.out.println("Waiting for client on port " + 
+               serverSocket.getLocalPort() + "...");
+            Socket server = serverSocket.accept();          
+            System.out.println("Just connected to " + server.getRemoteSocketAddress());
+            DataInputStream in = new DataInputStream(server.getInputStream());          
+            System.out.println(in.readUTF());
+            DataOutputStream out = new DataOutputStream(server.getOutputStream());
+            out.writeUTF("Thank you for connecting to " + server.getLocalSocketAddress()
+               + "\nGoodbye!");
+            server.close();           }
+      catch (SocketTimeoutException s) {
+          System.out.println("Socket timed out!");
+          break;         } catch (IOException e) {
+          e.printStackTrace();
+          break;         }      }   }
+ public static void main(String [] args) {
+    int port = Integer.parseInt(args[0]);
+    try {
+       Thread t = new GreetingServer(port);
+       t.start();
+    } catch (IOException e) {
+       e.printStackTrace();
+    }
+ }
+}

javaNetworking/GreetingServer.class

@@ -0,0 +1,25 @@
+package second;
+
+import java.io.*;  
+import java.net.*;  
+
+public class MyClient{  
+public static void main(String args[])throws Exception{  
+Socket s=new Socket("localhost",3333);  
+DataInputStream din=new DataInputStream(s.getInputStream());  
+DataOutputStream dout=new DataOutputStream(s.getOutputStream());  
+BufferedReader br=new BufferedReader(new InputStreamReader(System.in));  
+  
+String str="",str2="";  
+while(!str.equals("stop")){  
+str=br.readLine();  
+dout.writeUTF(str);  
+dout.flush();  
+str2=din.readUTF();  
+System.out.println("Server says: "+str2);  
+}  
+  
+dout.close();  
+s.close();  
+}}
+/** url class in java  */

javaNetworking/GreetingServer.java

@@ -0,0 +1,24 @@
+package second;
+
+import java.net.*;  
+import java.io.*;  
+class MyServer{  
+public static void main(String args[])throws Exception{  
+ServerSocket ss=new ServerSocket(3333);  
+Socket s=ss.accept();  
+DataInputStream din=new DataInputStream(s.getInputStream());  
+DataOutputStream dout=new DataOutputStream(s.getOutputStream());  
+BufferedReader br=new BufferedReader(new InputStreamReader(System.in));  
+  
+String str="",str2="";  
+while(!str.equals("stop")){  
+str=din.readUTF();  
+System.out.println("client says: "+str);  
+str2=br.readLine();  
+dout.writeUTF(str2);  
+dout.flush();  
+}  
+din.close();  
+s.close();  
+ss.close();  
+}}