Could you explain me please how to mock System.in correctly? I have a simple test and I assign values to @Test public void testBarCorrect() { System.setIn(new ByteArrayInputStream("7\n2\n...

In our application, we expect user input within a Thread as follows : BufferedReader br = new BufferedReader(new InputStreamReader(System.in)); I want to pass that part in my unit test so that I...

If I start reading from System.in, it will block the thread until it gets data. There is no way to stop it. Here are all the ways that I've tried: Interrupting the thread Stopping the thread Clos...

I am just a newbie in Java. I was wondering the way System.out.println() is used. Out is a static field inside System class. The type of out is PrintStream. But when I saw the constructor of PrintS...

I know that the System.in of the System class is an instance of a concrete subclass of InputStream because the read() method of InputStream is abstract and System.in must override this method. Acco...

I'm designing a console application for a server running RedHat. The end users should be able to run this app with any terminal of their choosing. (For example; Gnome Terminal, Putty SSH/ Telnet, M...

Is it possible to use NIO with System.in? I would like to somehow treat 'stdin' as a selectable channel. Has anyone found a way to do this?

Is it possible for Eclipse to read stdin from a file?

Reader rdr = new InputStreamReader(System.in); BufferedReader br = new BufferedReader(rdr); String s; s = br.readLine(); br.close(); Scanner sc = new Scanner(System.in); s = sc.nextLine(); System.o...

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I am not sure how you are supposed to read in from system input from a Java file. I want to be able to call java myProg < file Where file is what I want to be read in as a string and giv...

I am trying to create a docker image for my java application. At startup this application needs to be given a password (currently via console). I tried several methods of obtaining input however t...

I'm trying to re-factor a large and frequently used part of my application into separate methods to make it easier to maintain. Some of these methods asks the user for input and does input validat...

I’m working on the UVa Online Judge problem set archive as a way to practice Java, and as a way to practice data structures and algorithms in general. They give an example input file to submit to ...