asked on

Problem when reading from stdin - Command Line

Hey experts,

I have the following lines of code:

try
{
BufferedReader stdin = new BufferedReader(new InputStreamReader(System.in));
System.out.println("Enter userid: ");
LoginUser = stdin.readLine();
System.out.println("Enter password: ");
LoginPass = stdin.readLine();
System.out.println("end try");
}
catch(IOException ex)
{
ex.printStackTrace();
}

I am running them on the command line, I am successfully entering the userid and password, but the program is never reaching the "end try" statement....any help on solving the problem??

ASKER CERTIFIED SOLUTION

zzynx

membership

This solution is only available to members.

To access this solution, you must be a member of Experts Exchange.

Start Free Trial

SOLUTION

Nick_72

membership

This solution is only available to members.

To access this solution, you must be a member of Experts Exchange.

Start Free Trial

CEHJ

Areyou 100% sure that's the code you're running?

CEHJ

Please delete the duplicate you just posted before anyone posts to it

zzynx

>> Please delete the duplicate you just posted before anyone posts to it
It's no duplicate. Here he tries to run on the command prompt.
In the other Q he tries to run it in netBeans.

zzynx

mte01,
...and since it runs fine in netBeans it will run fine on the command prompt too.

mte01

ASKER

ok..now I realized that I am doing a method before it...when I am removing this method, it's printing the end try successfully, but with it it's having this problem...this is the method:

public void performConnection()
{
try
{
socket = new Socket(host, port);
}
catch (UnknownHostException e)
{
System.out.println("ERROR: Can't find host: " + host);
return;
}
catch (IOException e)
{
System.out.println("ERROR: Can't open socket on rendezvous port "
+ port + " (on host " + host + ").");
return;
}

//Try to open streams to read and write from the socket.
try
{
os = socket.getOutputStream();
is = socket.getInputStream();
}
catch (IOException e)
{
System.out.println("ERROR: Created data socket but can't "
+ "open stream on it.");
System.out.println("...Disconnecting.");
return;
}

//Try to open a socket to the port.

if ((os != null) && (is != null))
{
//Let the main applet thread know we've successfully rendezvoused.
commandAvailable = false;
new LoginThread(this).start();
}
else
{
System.out.println("ERROR: Port is valid but communication failed. "
+ "Please TRY AGAIN.");
}
}

performConnection is being called before the beginning of the try block in the question.....

zzynx

If you run it in debug mode in netBeans you'll immediately see where it gets stuck

mte01

ASKER

>>zzynx

In netbeans, it's not getting stuck anywhere....it's ignoring the prompts, and continuing through the program.......while on the command line, as I said the end of try is not reached when I am using the above method....

zzynx

Add some System.out.println() in your performConnection() so that you know what call is blocking

mte01

ASKER

Something new...now it's printing the end try, but it's never exiting the program!....very weird!!

zzynx

>> now it's printing the end try, but it's never exiting the program!.
1) What did you change in your code?
2) How do you know it doesn't exit?

mte01

ASKER

>>zzynx

No, wait, this is normal because there is a thread that is still running (new LoginThread(this).start() in performConnection())....now after using your program I don't have a problem in the command prompt with the above, I need to see a problem in the method that follows the block in the question.....I'll see if I'll close this question in a few minutes.....

zzynx

>> now after using your program I don't have a problem in the command prompt with the above
Aha!!!

>> I'll see if I'll close this question in a few minutes.....
OK

zzynx

Thanks

CEHJ

>> ok..now I realized that I am doing a method before it

IOW the comment i posted was correct?:

>> Areyou 100% sure that's the code you're running?