What method inScanner class can be used to accept negative numbers?

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Java

Can scanner class take negative numbers?

Posted 26-Dec-14 13:03pm

CristianCruz503

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Sergey Alexandrovich Kryukov 26-Dec-14 19:21pm

Negative of what types? What's wrong with reading original Java documentation?
—SA

2 solutions

Solution 2

You can take negative number as input by all methods above mentioned but I would recommended not to use Scanner because it is damn slow. Always use BufferedReader to take input & PrintWriter for output.

Posted 28-Dec-14 4:20am

28shivamsharma

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Sergey Alexandrovich Kryukov · Accepted Answer · 2014-12-26T13:21:00

Solution 1

Apparently, these are the methods nextBigInteger, nextDouble, nextFloat, nextInt, etc., depending on the type you want to parse:
http://docs.oracle.com/javase/7/docs/api/java/util/Scanner.html[^].

—SA

Posted 26-Dec-14 13:21pm

Sergey Alexandrovich Kryukov

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CristianCruz503 26-Dec-14 21:12pm

so it don't matter what method I use? Thank You very much.

Sergey Alexandrovich Kryukov 26-Dec-14 21:40pm

You are welcome.
It depends on what do you expect to have in the file and what numeric types do you want to use. For example, of you have something like -127 to 127, it could be the smallest integer type; of decimal point is involved, it could be floating-point type, and so on...
—SA