[SOLVED] Multi-dimensional Array further help

[thelinuxguy]

Hi

I have managed to send the multi-dimensional array to the client, the only problem is I am now trying to make use of the sent Object as follows:-

import java.io.*;
import java.net.*;
import java.util.Scanner;
import java.nio.*;
import java.util.*;

public class TCPclient
{
public static void main(String[] args)

{

// Declare client socket
Socket clientSocket = null;
Scanner myScanner = new Scanner(System.in);
// Declare output stream and string to send to server
DataOutputStream os = null;
int request;
int n = 0;
Object A[][] = new Object[n][n];


// Declare input stream from server and string to store input received from server
BufferedReader is = null;
int responseLine;
int b;
InputStream in;
ObjectInputStream recieve;
Object recieved;
Object recievedB;
Object c;


// Create a socket on port 1024
//Stream header
try
{
clientSocket = new Socket("localhost", 1024);
os = new DataOutputStream(clientSocket.getOutputStream());
is = new BufferedReader(new InputStreamReader(clientSocket.getInputStream()));






}
catch (UnknownHostException e)
{
System.err.println("Don't know about host: hostname");
}
catch (IOException e)
{
System.err.println("Couldn't get I/O for the connection to: hostname");
}

// Write data to the socket
if (clientSocket != null && os != null && is != null)
{


try
{
request = 0;
os.writeInt(request);
in = clientSocket.getInputStream();
recievedFrom = new ObjectInputStream(in);

while(request != 1)
{
responseLine = is.read();
b = responseLine;
System.out.println("Client b " + b + "\n");
request++;
recieved = recieveFrom.readObject();
recievedB = recieveFrom.readObject();
System.out.println(recieved);
System.out.println(recievedB);
A[n][n] = recieved;

}//end while

// Close the input/output streams and socket

os.flush();
is.close();
clientSocket.close();
}//end try
catch (UnknownHostException e)
{
System.err.println("Trying to connect to unknown host: " + e);
}
catch (IOException e)
{
System.err.println("IOException: " + e);
}
catch(ClassNotFoundException e)
{
System.out.println(e);
}
}//end if

}
}

The variable recieved holds the contents of readObject(), this recieves the Object from the Server. I have created the variable A[n][n] which is to store the result of recieved. I have implemented A[n][n] = recieved inside of the while() loop, but get the following exception message
[[Ljava.lang.Object;@14318bb
Exception in thread "main" java.lang.ArrayIndexOutOfBoundsException: 0
at TCPclient.main(TCPclient.java:83)

therefore I know that the Object is being recieved, but the A[n][n] = recieved; is not liked, it will compile, but the Exception is thrown. I am trying to get the value of A[n][n] for use outside of the loop for further calculations. An advice on how I could do this would be apprciated.

theLinuxGuy

[OrangeDog]

int n = 0;
Object A[][] = new Object[n][n];

The array is declared as having no dimensions. I think you want

A = recieved;

instead.

[thelinuxguy]

Hi
OrangeDog

That did not work, I entered A = recieved; and got

TCPclient.java:83: incompatible types
found : java.lang.Object
required: java.lang.Object[][]
A = recieved;
The Object being recieved does have dimensions.

[OrangeDog]

Try a cast

A = (Object[][])recieved;

If that doesn't work, using a Collection or some kind of plaintext format to transport the data might be easier.

[thelinuxguy]

Hi OrangeDog

Thanks,
A = (Object[][])recieved;
compiles and runs fine


Thanks again

theLinuxGuy