Java: time to think

Question

Java

Welcome all.
I have never written in Java before, and then I needed to write a testing system. Actually, the only problem that has arisen is that
1) you need to display a question
2) give the user five seconds to answer
3) if the user has entered a number during this time, immediately go to the next question
4) if he has not entered, the program should understand that no answer was given was and move on to the next question.
I read the responses with Scanner, and I can't figure out how to get around the fact that it blocks the stream on commands like next*() and hasNext*() until a newline character is received. I ask java professionals to help :)

Answer 1

Have you tried putting it in a separate thread?
I don’t write in Java, I passed by

Answer 2

Try using a timer. It runs on a background thread by default.
download.oracle.com/javase/6/docs/api/java/util/Timer.html

Answer 3

Java has nothing to do with it, these are the features of console I / O.
You will run into the same problem if you start using scanf, fread, etc. in C++, PHP and many other languages.
If you want to get a normal user interface, go straight to the GUI toolkits: AWT, Swing or SWT.