Java execution flow(in loop) freezes after no text in Scanner

Question

I have scanner(on client) that is getting information from(server), when server sends all required strings, all the code after that is just not being executed(like it paused execution of the program). Example(it loops and prints good, until server is sending all the data, but, when its finished, it does not execute print, or any other command, even in the loop itself!):

while(scanner1.hasNextLine()){
     System.out.print("-- " + scanner1.nextLine());
}
 System.out.print("Something bla bla");

RESULT: -- data 1 -- data 2

Btw, i am new in Java, so if I made any stupid mistakes, I apologize :)

Sure: Scanner scanner1 = new Scanner(client.getInputStream()); @pathfinderelite — Luka, Nov 11 '16 at 16:22
Try using following code snippet while(true){ String input = scanner1.nextLine(); if (input == null || input.isEmpty()) { break; } System.out.print("-- " + input); } — dammina, Nov 11 '16 at 16:24
See [this](http://stackoverflow.com/questions/16206813/how-to-terminate-scanner-when-input-is-complete) answer. Your server needs to send something that says it's done. — pathfinderelite, Nov 11 '16 at 16:26
That is really complex for my program, but thank you @pathfinderelite — Luka, Nov 11 '16 at 16:45

score 1 · Accepted Answer · answered Nov 11 '16 at 16:59

1

The program is waiting for the remote to either send an end of line marker (e.g. '\n'), or close its socket output stream. However it seems like the server doesn't send any of them. So instead of using Scanner here you should try using something like client.getInputStream().read()

answered Nov 11 '16 at 16:59

dammina

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If on server we can close the socket by doing socket.close(); , how should we start it again? I am useing printwriter: PrintWriter out = new PrintWriter(clientConnection.getOutputStream(), true); – Luka Nov 11 '16 at 20:52

Java execution flow(in loop) freezes after no text in Scanner

1 Answers1