java client and server basic

Author: JabedWeb

Client.java

@@ -0,0 +1,31 @@
+import java.io.ObjectOutputStream;
+import java.io.IOException;
+import java.io.ObjectInputStream;
+import java.net.Socket;
+import java.util.Scanner;
+
+public class Client{
+    public static void main(String[] args) throws IOException{
+       Socket socket = new Socket("localhost", 5000);
+       System.out.println("client Started");
+
+       //must first create the output stream before the input stream
+        ObjectOutputStream oos = new ObjectOutputStream(socket.getOutputStream());
+         ObjectInputStream ois = new ObjectInputStream(socket.getInputStream());
+         
+         Scanner sc =new Scanner(System.in);
+         String messsag= sc.nextLine();
+
+            
+        try {
+             //send to server 
+         oos.writeObject(messsag);
+         //receive from server
+         String fromServer = (String) ois.readObject();
+         System.out.println("Server: " + fromServer);
+        } catch (Exception e) {
+            // TODO: handle exception
+        }
+        
+    }
+}

Server.class

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+import java.io.ObjectInputStream;
+import java.io.ObjectOutputStream;
+import java.net.ServerSocket;
+import java.net.Socket;
+
+public class Server  {
+    public static void main(String[] args) throws Exception{
+        ServerSocket serverSocket = new ServerSocket(5000);
+
+        while(true){
+            Socket clientSocket = serverSocket.accept();
+            System.out.println("Server connected");
+
+            ObjectInputStream ois= new ObjectInputStream(clientSocket.getInputStream());
+            ObjectOutputStream oos = new ObjectOutputStream(clientSocket.getOutputStream());
+
+           try{
+                   String message = (String) ois.readObject();
+                   System.out.println("Client: " + message);
+                   oos.writeObject("Server: " + message);
+           }catch(Exception e){
+               System.out.println("An error occurred");   
+        }
+    }
+ }
+}

Server.java

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+import java.io.BufferedReader; 
+  import java.io.DataInputStream; 
+  import java.io.DataOutputStream; 
+  import java.io.IOException; 
+  import java.io.InputStreamReader; 
+  import java.net.*; 
+ 
+public class TwoWayClient 
+{ 
+    public static void main(String[] args) throws IOException { 
+        Socket s = new Socket("localhost", 5000); 
+ 
+   System.out.println("Client Connected at server Handshaking port " 
++s.getPort()); 
+   System.out.println("Client's communication port " + 
+s.getLocalPort()); 
+   System.out.println("Client is Connected"); 
+ 
+ 
+        DataOutputStream output = new 
+DataOutputStream(s.getOutputStream()); 
+        DataInputStream input = new DataInputStream(s.getInputStream()); 
+        BufferedReader read = new BufferedReader(new 
+InputStreamReader(System.in)); 
+ 
+        String str = ""; 
+        String serverResponse; 
+ 
+ 
+    while (!str.equals("stop")) 
+        { 
+   System.out.println("Enter message to send (or 'stop' to close): "); 
+   System.out.print("Client: "); 
+             
+str = read.readLine(); 
+ 
+ 
+            output.writeUTF(str); 
+ 
+            if (!str.equals("stop")) { 
+                serverResponse = input.readUTF(); 
+                System.out.println("Server: " + serverResponse); 
+            } 
+        } 
+ 
+        output.close(); 
+        input.close(); 
+        read.close(); 
+        s.close(); 
+ }} 
+ 
+ 
+//TwoWayServer.java 
+ 

TwoWayClient.java

@@ -0,0 +1,49 @@
+
+import java.io.DataInputStream; 
+import java.io.DataOutputStream; 
+import java.io.IOException; 
+import java.net.ServerSocket; 
+import java.net.Socket; 
+import java.util.Scanner;  
+ 
+public class TwoWayServer { 
+ 
+    public static void main(String[] args) throws IOException { 
+    ServerSocket serverSocket = new ServerSocket(5000);  
+   System.out.println("Server started on port " +   
+serverSocket.getLocalPort()); 
+ 
+   Socket clientSocket = serverSocket.accept(); 
+   System.out.println("Client connected: " + 
+clientSocket.getRemoteSocketAddress()); 
+ 
+  DataOutputStream outputToClient = new 
+DataOutputStream(clientSocket.getOutputStream()); 
+  DataInputStream inputFromClient = new 
+DataInputStream(clientSocket.getInputStream()); 
+ 
+        String clientMessage; 
+        String serverResponse; 
+      Scanner scanner = new Scanner(System.in);  
+ 
+        while (true) { 
+            clientMessage = inputFromClient.readUTF(); 
+ 
+            if (clientMessage.equals("stop")) { 
+                break; 
+            } 
+ 
+            System.out.println("Client: " + clientMessage); 
+ 
+            System.out.print("Server reply: "); 
+            serverResponse = scanner.nextLine(); 
+ 
+            outputToClient.writeUTF(serverResponse); 
+        } 
+ 
+        outputToClient.close(); 
+        inputFromClient.close(); 
+        scanner.close();  
+        clientSocket.close(); 
+        serverSocket.close(); 
+    }}