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Counting inputs and scanner class

James Farber

Joined: Feb 01, 2007
Posts: 6
How do you count the amount of inputs using the Scanner class?
Say for instance I want the user to enter an even, and only an even amount of numbers

"Enter an even amount of numbers :"

5 12 7 2

after hitting return, how can I store these into one variable?
Jim Yingst

Joined: Jan 30, 2000
Posts: 18671
For a problem like this, I recommend you start with a smaller problem and then build on your solution For example:

1. Write a program that reads just one number from the list using a Scanner and prints it out.

2. Add a loop to make the Scanner read repeatedly. Is there a way to make the Scanner stop once there are no more numbers to read?

3. Add an int variable "count". Every time you go through the loop, add one to the count. After you're done with the loop, print the count.

If you get stuck on one part, show us what you've done so far and we can offer more suggestions.

"I'm not back." - Bill Harding, Twister
K. Tsang

Joined: Sep 13, 2007
Posts: 3130

This looks harder than it sounds!! Yet I see there are many ways to do it.

K. Tsang JavaRanch SCJP5 SCJD OCPJP7 OCPWCD5 OCPBCD5 OCPWSD5 OCMJEA5 part 1 part 2/3
I agree. Here's the link:
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