Sending string through socket is getting null error in catch statement

Question

im writing a simple RSA encryption program that will send the coded message across a socket, but im getting an error on the output stream. I dont know if the class is getting passed the string correctly or if the output stream is just not working.

import java.util.*;
import java.lang.*;
import java.io.*;
import java.net.*;

public class connect{

    public static Socket socket;

    public connect(Socket t)
    {
        t = socket;
    }


    public void send(String msg)
    {
        try
        {
            OutputStream os = socket.getOutputStream();
            PrintStream out = new PrintStream(os);
            out.print(msg);
            out.flush();


        }catch(Exception e){System.out.println("Error on send : " + e.getMessage());}
    }
}

One observation: be careful with socket variable as static here. As soon as you will have more than one connection this might lead to nasty bugs... — Dario
– Dario, Commented Feb 23, 2015 at 12:55
Side note: RSA is more usually used to encrypt a key for another algorithm (e.g. AES) or for signing, not for encrypting a large amount of data — m0skit0
– m0skit0, Commented Feb 23, 2015 at 12:56
By large amount I mean bigger than RSA key size (more details here). — m0skit0
– m0skit0, Commented Feb 23, 2015 at 13:02

user902383 · Accepted Answer · 2015-02-23 12:55:13Z

1

Your socket is null,

in your constructor

public connect(Socket t)
{
    t = socket;
}

you are setting passed value t to be equal socket, you need to do this other way around

answered Feb 23, 2015 at 12:55

user902383

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MJ01 · Accepted Answer · 2015-02-23 12:55:10Z

0

Shouldn't it be socket = t in the connect method?

answered Feb 23, 2015 at 12:55

MJ01

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