How to quit from a catch exception

Question

I'm using java to connect to http server. All is fine. Of course I catch exceptions ( SocketTimeoutException , ConnectException , IOException ). But my problem is when (for example) an ConnectException occurs, the app stay stucked. I can't anymore continue in an other part of program... I tried "return ..", System.exit (but I don't want to exit from application). Any idea ?

The skeleton prog looks like this:

boolean metod_to_check_http_server(){

try{
Create_connection(URL);
Set_Time_Out(3000);
open_HTTP_Connection();
Close_Connection();
return true; // All this part is fine...
}


catch (EXCEPTIONS)
{ // Here I know I have connection problem
// how could I return to main prog from here ?
// return false ? not work...
// System.exit(..); // too violent !
// so ?
}

Answer 1

尝试在捕获到一个代码之后将finally块放入您的代码中。

Answer 2

If you add finally block to your try - catch statement you can continue your flow

try
{

}
catch{

}
finally{

}

Answer 3

Your question cannot be answered without knowing more about your program and environment, but it might be a good idea to inform the user about the connection failure, for example in a dialog saying "Connection failed". And don't forget to close any open connections in a finally block.

Answer 4

You should do exception handling yourself, and return a false if connection fails or is invalid....

boolean method_to_check_http_server(){

    try{
        Create_connection(URL);
        Set_Time_Out(3000);
        open_HTTP_Connection();
        return true; // All this part is fine...
    } catch (EXCEPTIONS) {
        displayError();
        return false;
    } finally {
        Close_Connection();
    }
}

As you can see, I made sure that my connection is closed (in the finally block) so that I don't leave opened sockets running in some OS thread somewhere.