Question

What’s wrong with this code

import java.io.IOException;
import java.net.ServerSocket;
import java.net.Socket;

/**
 *
 * @author Master
 */
public class Server {
    try
    {
    ServerSocket S = new ServerSocket(3333);
    Socket So = S.accept();
    }
    catch(IOException e)
    {
        System.out.println("IOError");
    }

}

Firstly I wrote the code without try catch and I got an unreported exception java.io.IOException; must be caught or declared to be thrown Error but Netbeans didn’t suggest that I add a try-catch block . Now I added the try-catch block manually but It still shows an error and suggests that I must add another try-catch block !

Answer 1

You’re trying to add a try block at the top level of the class – you can’t do that. Try blocks have to be in methods or initializer blocks.

If you really want to create the server socket on construction, put the code in a constructor:

public class Server {

    private ServerSocket serverSocket;
    private Socket firstConnection;

    public Server {
        try
        {
            serverSocket = new ServerSocket(3333);
            firstConnection = serverSocket.accept();
        }
        catch(IOException e)
        {
            System.out.println("IOError");
        }
    }
}

I assume you’ll have real exception handling (or rethrowing) rather than just catching the IOException and continuing, of course?