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POHow to send an OBJECT over TCP in java?
 

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  1. POHow to send an OBJECT over TCP in java?
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    <p>I'm writing a program to send an <strong>object</strong> from one class to another class. Here is a short sample example of my program to represent the problem. As you can see the object to send from server to client is Student class <strong>which has been defined separately in each class(Server/Client).</strong> I have examined this code by sending an ArrayList which works fine but when it comes to a class type which defined by myself i'm receiving this error:</p> <pre><code>Exception in thread "main" java.lang.ClassCastException: ServerSide$1Student cannot be cast to ClientSide$1Student at ClientSide.main(ClientSide.java:29) </code></pre> <p>Here is the code for Server side:</p> <pre><code>import java.io.*; import java.net.*; public class ServerSide { public static void main(String[] args) { class Student implements Serializable { int id; public Student(int num){id=num;} public void setID(int num){id=num;} public void Print(){System.out.println("id = " + id);} } try { Student a = new Student(3); ServerSocket myServerSocket = new ServerSocket(9999); Socket skt = myServerSocket.accept(); try { ObjectOutputStream objectOutput = new ObjectOutputStream(skt.getOutputStream()); objectOutput.writeObject(a); } catch (IOException e) { e.printStackTrace(); } } catch (IOException e) { e.printStackTrace(); } } } </code></pre> <p>And for the client side is: </p> <pre><code>import java.io.*; import java.net.Socket; import java.net.UnknownHostException; public class ClientSide { public static void main(String[] args) { class Student implements Serializable { int id; public Student(int num){id=num;} public void setID(int num){id=num;} public void Print(){System.out.println("id = " + id);} } try { Socket socket = new Socket("10.1.1.2",9999); try { ObjectInputStream objectInput = new ObjectInputStream(socket.getInputStream()); try { Object object =(Student) objectInput.readObject(); Student tmp = (Student) object; tmp.Print(); } catch (ClassNotFoundException e) { e.printStackTrace(); } } catch (IOException e) { e.printStackTrace(); } } catch (UnknownHostException e) { e.printStackTrace(); } catch (IOException e) { e.printStackTrace(); } } } </code></pre> <p><strong>Edit:</strong></p> <p><strong>I moved them to same file and added serialise ID. It works fine.</strong></p>
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