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Thread: Class Casting

  1. #1
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    Default Class Casting

    Hey i am trying to pass an object array from a client to server.....The problem is ,after passing it through the socket when i try to cast it back to client it gives me an exception


    "Exception in thread "main" java.lang.ClassCastException: [Ljavaapplication28.Client; cannot be cast to javaapplication28.Client
    "

    And i fail to understand what is wrng...Plz Help

    The code for Client is
    /*
     * To change this template, choose Tools | Templates
     * and open the template in the editor.
     */
     
     
     
     
    package javaapplication28;
    import java.net.*;
    import java.io.*;
     
    public class Client implements Serializable  {
        int value;
        String id;
        private Client[] Array;
     
       public Client[] getArray() {
     
            for (int i = 0 ; i < 5 ; i ++){
             Array[i].id = id;
             Array[i].value = value;
     
          }
       return Array;
        }
     
     
      public Client(int x , String putInId)
     
        {
             id = putInId ;
              value = x;
     
        }
     
     
     
        Client(){
            System.out.println("I am in constr");
         value = 1;
         id = "my program is working";
     
        }
    public static void main(String args[])
    {
        try{
          Socket accept_Socket = new Socket("127.0.0.1",1254);
          OutputStream through_data = accept_Socket.getOutputStream(); // getoutput returns the output stream where the data can be written
          ObjectOutputStream new_Object = new ObjectOutputStream(through_data);
     
     
          Client [] sendData = new Client [5];
          System.out.println("The Client Side" + sendData);
           String putInId = "1 + ";
             int x = 1;
     
           for (int i = 0 ; i < 5; i++)
                 {
     
                    sendData[i] = new Client (x,putInId);
                  }
     
     
     
          new_Object.writeObject(sendData);
          System.out.println("1");
     
          new_Object.close();
          System.out.println("2");
         through_data.close();
         System.out.println("3");
    //accept_Socket.close();
            }
            catch(Exception e)
                {
                        System.out.println(e);
                        System.out.println("4");
     
                }
        }
     
     
     
     
     
    }
    and the code for server is
    /*
     * To change this template, choose Tools | Templates
     * and open the template in the editor.
     */
     
    package javaapplication28;
     
    import java.io.IOException;
    import java.io.InputStream;
    import java.io.ObjectInputStream;
    import java.io.Serializable;
    import java.net.ServerSocket;
    import java.net.Socket;
     
     
    /**
     *
     * @author Administrator
     */
    public class Main implements Serializable  {
     
    Main(){
    int value = 1;
    String id = "Sana";
     
    }
        public void driver() throws IOException, ClassNotFoundException
        {
     
            ServerSocket socket = new ServerSocket(1254);
            Socket accept_Socket = socket.accept();
            InputStream getData = accept_Socket.getInputStream();
            ObjectInputStream ois = new ObjectInputStream(getData);
     
     
           Client y = null;
             y =  (Client) ois.readObject();
           Client [] check = new Client [5];
           check = y.getArray();
           //check [] = (Client) ois.readObject();
          // check[] = ois.readObject[];
                 for(int i = 0 ; i<5 ; i++)
                    {
                         System.out.println("The Server Side" + check[i].id);
                    }
         //  socket.close();
     
     
           accept_Socket.close();
           ois.close();
     
        }
     
     
     
        public static void main(String[] args) throws IOException, ClassNotFoundException {
     
            Main calling = new Main();
            calling.driver();
     
     
     
        }
     
     
     
    }
    Last edited by helloworld922; January 9th, 2012 at 09:36 AM.


  2. #2
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    Default Re: Class Casting

    [Ljavaapplication28.Client; cannot be cast to javaapplication28.Client
    You are trying to cast an array (Ljavaapplication28.Client) to a Client object (javaapplication28.Client) which definitely causes the error.

  3. #3
    Think of me.... Mr.777's Avatar
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    Default Re: Class Casting

    @Sana1990: Please use the code tags to wrap your code in. If you don't know how, click Go Advanced button right below your reply panel. Then click the # sign and place your code inside.
    Thanks and don't forget to read the Forums Rules. Welcome to Java Programming Forums.

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