Java console readline null

If no console device is available then an invocation of that method will return null. Read and write operations are synchronized to guarantee the atomic completion of critical operations; therefore invoking methods readLine , readPassword , format , printf as well as the read, format and write operations on the objects returned by reader and writer may block in multithreaded scenarios.

Invoking close on the objects returned by the reader and the writer will not close the underlying stream of those objects. The console-read methods return null when the end of the console input stream is reached, for example by typing control-D on Unix or control-Z on Windows.

Subsequent read operations will succeed if additional characters are later entered on the console's input device. Unless otherwise specified, passing a null argument to any method in this class will cause a NullPointerException to be thrown. Security note: If an application needs to read a password or other secure data, it should use readPassword or readPassword String, Object Interestingly, java.

I was getting this error: java. NoSuchElementException: No line found. The solution was run the main class instead of a gradle task — Maurici Abad. Muhammed Ozdogan Muhammed Ozdogan 3, 6 6 gold badges 27 27 silver badges 45 45 bronze badges.

You could use an Jframe. Kerwin Sneijders 10 10 silver badges 30 30 bronze badges. How would one handle the input that's been given?

Scanner API is what you are looking for. Kick Buttowski 6, 12 12 gold badges 34 34 silver badges 57 57 bronze badges. Nagakishore Sidde Nagakishore Sidde 2, 1 1 gold badge 14 14 silver badges 9 9 bronze badges. Any explanations about why Scanner is what OP should use?

What about other alternatives like BufferedReader? It is very easy to get a hang of it, esp for the beginners. It takes some time to get a hang of it and appreciate it. At least, that is what happened to me when there was no Scanner API, before java There's another answer here explaining scanner in detail with example: stackoverflow.

Sign up or log in Sign up using Google. Sign up using Facebook. Sign up using Email and Password. Create a free Team What is Teams? Collectives on Stack Overflow. Learn more. Asked 6 years ago. Active 10 months ago. Viewed 11k times. Peter Mortensen Keval Pithva Keval Pithva 2 2 gold badges 5 5 silver badges 20 20 bronze badges. The means line 13, in the future it helps if you tell us which line this is : — user Add a comment.

Active Oldest Votes. From the Javadoc: Returns the unique Console object associated with the current Java virtual machine, if any.

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